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Microneedling for Hair Loss: The Landmark 2013 Study That Changed Everything
Posted by Dr. Rachita Dhurat, MS Sukesh et al. on March 05, 2026
Key Findings at a Glance
4× more hair growth: Microneedling + minoxidil produced +91.4 hairs/cm² versus +22.2 hairs/cm² with minoxidil alone — a fourfold improvement (p = 0.039)
82% saw major improvement: 41 out of 50 microneedling patients reported over 50% improvement, compared to just 4.5% of the minoxidil-only group
Faster results: New hair growth visible by week 6 (microneedling) versus week 10 (minoxidil alone)
Helped treatment-resistant cases: 12 men who had previously failed finasteride/minoxidil showed positive response with microneedling added
Safe and well-tolerated: No significant adverse effects reported in either group across the entire 12-week trial
Evidence Summary
Study Design
Randomised, evaluator-blinded, comparative pilot study
Sample Size
100 men enrolled; 94 completed (50 microneedling, 44 minoxidil-only)
Key Result
+91.4 hairs/cm² (microneedling + minoxidil) vs +22.2 hairs/cm² (minoxidil alone)
Medical Disclaimer: This article summarises published clinical research for educational purposes only. It is not medical advice. Always consult a qualified healthcare professional before starting any hair loss treatment. Individual results may vary from those reported in clinical trials.
Reviewed by: Esther Bodde, MD — Physician and medical content reviewer at Hairgenetix. Dr. Bodde ensures all clinical research summaries accurately represent the original study data, methodology, and conclusions.
Why This Research Matters
Before this 2013 study, minoxidil was the standard topical treatment for male pattern hair loss — but many men found it only moderately effective, and those who had already tried it without success had few options left. Dr. Rachita Dhurat's team at Lokmanya Tilak Municipal Medical College in Mumbai asked a simple question: what if you could dramatically boost minoxidil's effectiveness by adding a physical treatment?
This study became the first randomised trial to demonstrate that microneedling could multiply the effects of minoxidil — not by a small margin, but by approximately four times. The results were so striking that they triggered a wave of follow-up research, including Gupta et al.'s 2022 meta-analysis and Pei et al.'s 2024 systematic review, both confirming the original findings. Today, microneedling for hair loss is one of the most researched combination therapies in dermatology — and this study is where it started.
Perhaps most importantly, the study showed that microneedling helped patients who had already failed conventional treatment — offering hope to a group that had previously been told nothing more could be done topically.
What The Researchers Did
The researchers recruited 100 men with mild to moderate androgenetic alopecia (Norwood-Hamilton grade III vertex or IV) at their dermatology department in Mumbai. The men were randomly assigned to one of two treatment groups:
Parameter
Microneedling Group (n = 50)
Minoxidil-Only Group (n = 44)
Treatment
Weekly dermaroller + 5% minoxidil twice daily
5% minoxidil twice daily only
Minoxidil dose
1 mL per application, twice daily
1 mL per application, twice daily
Microneedling
1.5 mm needles, rolled in longitudinal, vertical, and diagonal directions until mild erythema
None
Frequency
Microneedling weekly; minoxidil daily (skipped on procedure day)
Importantly, the evaluator who assessed results was blinded — they did not know which group each patient belonged to, reducing assessment bias. Six patients dropped out during the trial (lost to follow-up), leaving 94 men who completed all 12 weeks.
What Is a Randomised Evaluator-Blinded Comparative Study?
In this design, patients are randomly assigned to treatment groups (like flipping a coin), and the person measuring the results doesn't know which treatment each patient received. This prevents the evaluator from unconsciously favouring one group. It ranks among the strongest types of clinical evidence. While patients knew their own treatment (they could feel the microneedling), the blinded evaluation of photos and hair counts adds significant credibility. Having 100 men enrolled and 94 complete the study provides a solid evidence base for a pilot trial.
What They Found
1. Hair count: fourfold improvement
Finding: Microneedling + minoxidil produced a mean increase of +91.4 hairs/cm² at 12 weeks, compared to +22.2 hairs/cm² for minoxidil alone — a 4.1× greater improvement (p = 0.039).
This is the headline result. Both groups used the same minoxidil regimen (5%, twice daily, 1 mL per application). The only difference was the weekly microneedling session — and it quadrupled the hair count increase.
2. Investigator assessment: dramatic separation
Finding: On a 7-point scale (−3 to +3), 40 out of 50 microneedling patients scored +2 to +3 (moderate to greatly increased). Zero minoxidil-only patients reached the same scores.
The evaluator — who did not know which treatment each patient received — consistently rated the microneedling group as having substantially better results. This blinded assessment rules out expectation bias and confirms the hair count data with an independent measure.
3. Patient satisfaction: overwhelming difference
Finding:82% of microneedling patients (41/50) reported over 50% improvement in their hair loss, compared to just 4.5% of minoxidil-only patients (2/44).
4. Faster onset of results
Finding: New hair growth was visible by week 6 in the microneedling group, versus week 10 in the minoxidil-only group. Rapid growth of existing hairs was observed as early as week 1 in the microneedling group.
This faster response is clinically significant. Standard minoxidil treatment typically requires 3–6 months before results become noticeable. Microneedling cut that waiting period substantially.
5. Helped treatment-resistant patients
Finding: Of 12 men who had previously been unsatisfied with finasteride and/or minoxidil treatment, those in the microneedling group showed +1 to +2 improvement (4 patients scored +1, 8 patients scored +2). The 8 treatment-resistant patients in the minoxidil-only group showed no change.
This is perhaps the most important finding for patients who feel they have "tried everything." Adding microneedling to their existing treatment rescued their response.
Figure 1. Key outcomes from Dhurat et al. (2013) — microneedling + minoxidil vs minoxidil alone over 12 weeks. Data source: International Journal of Trichology, Vol. 5(1), pp. 6–11 (PMID: 23960389).
How Microneedling Boosts Hair Growth: The Biological Mechanisms
1. Enhanced drug absorption
Microneedling creates thousands of tiny channels in the scalp, temporarily bypassing the skin's barrier layer (stratum corneum). This allows minoxidil to penetrate much deeper into the follicle than surface application alone. The researchers proposed this as the primary mechanism: the same dose of minoxidil reaches more follicle stem cells when the delivery pathway is opened.
2. Growth factor release through wound healing
The controlled micro-injuries trigger the body's wound healing cascade, releasing platelet-derived growth factor (PDGF), epidermal growth factor (EGF), and fibroblast growth factor (FGF). These growth factors activate dermal papilla cells — the specialised cells at the base of each follicle that control the hair growth cycle. This creates a double benefit: the minoxidil stimulates follicles from one pathway while the body's own growth factors stimulate them from another.
3. Stem cell activation via Wnt pathway
The researchers referenced evidence that microneedling activates the Wnt/β-catenin signalling pathway — a key molecular switch that determines whether hair follicle stem cells enter the growth phase (anagen). This may explain why microneedling helped patients who had already failed standard treatment: it recruited dormant stem cells that minoxidil alone could not reach.
4. Increased blood supply
The micro-injuries stimulate angiogenesis (new blood vessel formation) around hair follicles, improving nutrient delivery to the dermal papilla. This complements minoxidil's known vasodilatory effect, creating more robust blood flow to the follicular unit. Research on GHK-Cu copper peptides shows similar angiogenic effects, which is why many clinicians now explore combinations of microneedling with growth-factor-rich serums.
Putting the Numbers in Context
A gain of 91.4 hairs per cm² is substantial. To put this in perspective:
The result from this study is notably higher than what later meta-analyses found when pooling multiple trials. This may reflect the specific study population (treatment-responsive Indian males), the aggressive 1.5 mm needle depth, or the weekly treatment frequency. Subsequent studies have generally confirmed the direction of the effect (microneedling significantly improves outcomes) while showing more moderate absolute numbers — typically an additional 30–40 hairs/cm² beyond minoxidil alone across diverse populations.
The 82% patient satisfaction rate stands out. Even if absolute hair counts vary between studies, the consistency of patient-reported improvement suggests the treatment produces cosmetically meaningful results that patients notice in the mirror — not just under a microscope.
Microneedling + copper peptides: 26.5% improvement in resistant alopecia
The Dhurat 2013 study ignited the field. Every subsequent meta-analysis — pooling hundreds to thousands of patients — has confirmed the core finding: adding microneedling to topical treatment produces significantly better results than topical treatment alone. The debate now focuses on optimal needle depth, frequency, and which topical agents work best in combination.
Treatment Protocol Used in This Study
Parameter
Specification
Device
Dermaroller
Needle length
1.5 mm
Technique
Rolled in longitudinal, vertical, and diagonal directions
Endpoint
Until mild erythema (redness) noted on the scalp
Frequency
Weekly (once per week)
Topical pairing
5% minoxidil lotion, 1 mL, twice daily
Post-procedure rule
No minoxidil on treatment day; resume 24 hours after microneedling
Duration
12 weeks
Setting
Clinical (performed by dermatology staff)
Important: This protocol was performed in a clinical setting by trained dermatology professionals. At-home microneedling devices typically use shorter needles (0.25–0.5 mm) and carry different risk profiles. Always consult a healthcare professional before attempting any microneedling protocol.
Research Limitations
Pilot study scale: While 100 enrolled patients is reasonable for a pilot, larger multicentre trials are needed to confirm the exact magnitude of benefit across diverse populations
12-week duration: The study lasted only 3 months. Longer follow-up is needed to confirm whether results are sustained (though the researchers noted that on retrospective questioning 8 months later, all microneedling patients reported a sustainable response)
Male-only population: All participants were men with androgenetic alopecia. The results cannot be directly extrapolated to female pattern hair loss, which has different hormonal mechanisms
Indian population: All participants were from a single centre in Mumbai. Hair characteristics and treatment response can vary across ethnic groups
No sham control: The minoxidil-only group did not receive sham (fake) microneedling, meaning some of the benefit could theoretically come from the ritual of weekly clinical visits. However, the blinded evaluator assessment mitigates this concern
Standard deviations not reported: The paper reports mean hair count changes but does not include standard deviations, making it harder to assess the spread of individual responses
Self-reported satisfaction: Patient satisfaction scores are subjective and may be influenced by the awareness of receiving an additional treatment
What This Means for Your Hair
This study established a principle that has since been confirmed by multiple large meta-analyses: microneedling combined with topical treatment is significantly more effective than topical treatment alone.
If you are currently using minoxidil and finding the results underwhelming, this research suggests that adding microneedling could substantially improve your outcome. The 82% satisfaction rate in the microneedling group — compared to 4.5% with minoxidil alone — indicates that the additional improvement is not just measurable under a microscope, but visible in the mirror.
The finding that microneedling helped previously treatment-resistant patients is particularly encouraging. If you have tried minoxidil or finasteride without success, this study suggests that adding microneedling may reactivate follicles that did not respond to medication alone.
For the best evidence-based approach, consider combining microneedling with science-backed topical formulations. Research on copper peptides like AHK-Cu and GHK-Cu shows these ingredients work through complementary biological pathways to minoxidil — activating dermal papilla cells and protecting follicles from premature cell death. The Kuceki et al. 2025 study specifically demonstrated that combining microneedling with copper peptide serums produced significant improvement in treatment-resistant alopecia.
Key Terms Explained
Microneedling (Dermaroller therapy)
A treatment that uses a device covered in tiny needles to create controlled micro-injuries in the skin, triggering the body's wound healing response and improving absorption of topical treatments.
Androgenetic Alopecia (AGA)
The most common form of hair loss in men, caused by a combination of genetic predisposition and the hormone DHT (dihydrotestosterone). Characterised by a receding hairline and thinning at the crown.
Norwood-Hamilton Scale
A classification system (grades I to VII) used to measure the severity of male pattern baldness. This study included grades III vertex and IV (moderate hair loss).
Dermal Papilla Cells (DPCs)
Specialised cells at the base of each hair follicle that act as the "control centre" for hair growth, sending signals that determine whether a follicle produces hair or remains dormant.
Minoxidil
An FDA-approved topical medication for hair loss. Originally developed as a blood pressure drug, it works primarily by increasing blood flow to hair follicles and extending the growth phase of the hair cycle.
Phototrichogram
A photographic technique used to count individual hairs in a defined scalp area (typically 1 cm²). Used in clinical trials to objectively measure changes in hair density over time.
Wnt/β-catenin Pathway
A molecular signalling system that controls hair follicle stem cell activation. When this pathway is switched on, dormant follicles re-enter the growth phase and begin producing new hair.
Evaluator-Blinded
A study design where the person assessing results does not know which treatment each patient received, preventing unconscious bias in measurements and scoring.
Frequently Asked Questions
How much more effective is microneedling + minoxidil compared to minoxidil alone?
In this study, the combination produced approximately 4 times more hair growth than minoxidil alone: +91.4 hairs/cm² vs +22.2 hairs/cm². Later meta-analyses pooling multiple studies show a more conservative but still significant advantage of approximately 1.5–2× improvement. The specific benefit depends on individual factors like hair loss severity, needle depth, and treatment consistency.
What needle length was used, and does depth matter?
This study used 1.5 mm needles, which penetrate into the dermis where hair follicle stem cells reside. The Gupta 2022 meta-analysis identified 1.5 mm as potentially optimal, though the Faghihi 2021 study found that 0.6 mm performed equally well as 1.2 mm, suggesting deeper is not necessarily better. For home use, most at-home devices use 0.25–0.5 mm, which may be sufficient for enhanced product absorption but may not provide the full wound-healing benefits of clinical-depth needling.
How often should microneedling be done for hair growth?
This study used weekly sessions. Most subsequent studies have also used weekly or biweekly protocols. It is important to allow enough time between sessions for the scalp to heal — the wound healing response itself is part of the mechanism. Most dermatologists recommend every 1–2 weeks for 1.0–1.5 mm depths, and more frequently (every few days) for shallower depths (0.25–0.5 mm).
Can I do microneedling at home, or does it need to be done professionally?
The study was performed in a clinical setting with professional-grade 1.5 mm dermarollers. At-home devices typically use shorter needles (0.25–1.0 mm) and are generally considered safe when used correctly with proper sterilisation. However, the clinical results may not be fully replicable at home with shorter needles. Always consult a healthcare professional before starting microneedling, especially at deeper depths.
Does microneedling for hair loss hurt?
At the 1.5 mm depth used in this study, patients typically experience mild discomfort and the scalp turns mildly red (erythema) — which was actually the treatment endpoint. In the clinical setting, topical anaesthesia may be applied beforehand. At-home use with shorter needles (0.25–0.5 mm) produces a tingling or prickling sensation that most users describe as tolerable. No significant adverse effects were reported in this 100-patient trial.
Can I apply minoxidil immediately after microneedling?
In this study, patients were specifically instructed to skip minoxidil on the day of microneedling and resume it 24 hours later. This is a precaution because the micro-channels created by needling increase absorption significantly, which could increase the risk of systemic side effects from minoxidil. Most dermatologists recommend waiting 12–24 hours after microneedling before applying minoxidil or other topical treatments.
Does microneedling work for female pattern hair loss?
This study only included men. However, the Pei et al. 2024 meta-analysis included studies with female participants and found that microneedling + topical treatment was superior to topical alone across both sexes. Emerging research, including the Moftah et al. 2013 mesotherapy study on female hair loss, suggests that scalp stimulation therapies generally help in female pattern hair loss as well, though dedicated large-scale trials are needed.
How long before I see results from microneedling for hair loss?
In this study, new hair growth was visible by week 6 in the microneedling group, compared to week 10 for minoxidil alone. Rapid growth of existing hairs was observed as early as week 1. Most dermatologists recommend committing to at least 12 weeks (3 months) of consistent treatment before judging results, as this is the typical timeframe for one full hair growth cycle to complete.
Original Study Citation
Dhurat R, Sukesh M, Avhad G, Dandale A, Pal A, Pund P. A Randomized Evaluator Blinded Study of Effect of Microneedling in Androgenetic Alopecia: A Pilot Study. International Journal of Trichology. 2013;5(1):6-11. doi:10.4103/0974-7753.114700. PMID: 23960389. PMC: PMC3746236.
How to cite this summary:
Hairgenetix Research Hub. "Microneedling for Hair Loss: The Landmark 2013 Study That Changed Everything — A Plain-Language Summary of Dhurat et al. (2013)." Hairgenetix, 2025. Available at: https://hairgenetix.com/blogs/articles/microneedling-hair-loss-landmark-study-dhurat-2013
Last updated: March 2026 — Reviewed for accuracy against the original publication. Cross-references updated to include 2024 and 2025 meta-analyses and studies.
About Hairgenetix Research Hub — Hairgenetix translates peer-reviewed hair science into plain-language summaries so you can make informed decisions about your hair care. Every article is based on published clinical research, reviewed by a physician (Dr. Esther Bodde, MD), and includes direct links to the original studies. Our copper peptide formulations are grounded in the same science we summarise here — including the microneedling synergy research documented across multiple clinical trials.
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Microneedling for Hair Loss: The Landmark 2013 Study That Changed Everything
Why This Research Matters
Before this 2013 study, minoxidil was the standard topical treatment for male pattern hair loss — but many men found it only moderately effective, and those who had already tried it without success had few options left. Dr. Rachita Dhurat's team at Lokmanya Tilak Municipal Medical College in Mumbai asked a simple question: what if you could dramatically boost minoxidil's effectiveness by adding a physical treatment?
This study became the first randomised trial to demonstrate that microneedling could multiply the effects of minoxidil — not by a small margin, but by approximately four times. The results were so striking that they triggered a wave of follow-up research, including Gupta et al.'s 2022 meta-analysis and Pei et al.'s 2024 systematic review, both confirming the original findings. Today, microneedling for hair loss is one of the most researched combination therapies in dermatology — and this study is where it started.
Perhaps most importantly, the study showed that microneedling helped patients who had already failed conventional treatment — offering hope to a group that had previously been told nothing more could be done topically.
What The Researchers Did
The researchers recruited 100 men with mild to moderate androgenetic alopecia (Norwood-Hamilton grade III vertex or IV) at their dermatology department in Mumbai. The men were randomly assigned to one of two treatment groups:
Importantly, the evaluator who assessed results was blinded — they did not know which group each patient belonged to, reducing assessment bias. Six patients dropped out during the trial (lost to follow-up), leaving 94 men who completed all 12 weeks.
In this design, patients are randomly assigned to treatment groups (like flipping a coin), and the person measuring the results doesn't know which treatment each patient received. This prevents the evaluator from unconsciously favouring one group. It ranks among the strongest types of clinical evidence. While patients knew their own treatment (they could feel the microneedling), the blinded evaluation of photos and hair counts adds significant credibility. Having 100 men enrolled and 94 complete the study provides a solid evidence base for a pilot trial.
What They Found
1. Hair count: fourfold improvement
This is the headline result. Both groups used the same minoxidil regimen (5%, twice daily, 1 mL per application). The only difference was the weekly microneedling session — and it quadrupled the hair count increase.
2. Investigator assessment: dramatic separation
The evaluator — who did not know which treatment each patient received — consistently rated the microneedling group as having substantially better results. This blinded assessment rules out expectation bias and confirms the hair count data with an independent measure.
3. Patient satisfaction: overwhelming difference
4. Faster onset of results
This faster response is clinically significant. Standard minoxidil treatment typically requires 3–6 months before results become noticeable. Microneedling cut that waiting period substantially.
5. Helped treatment-resistant patients
This is perhaps the most important finding for patients who feel they have "tried everything." Adding microneedling to their existing treatment rescued their response.
How Microneedling Boosts Hair Growth: The Biological Mechanisms
1. Enhanced drug absorption
Microneedling creates thousands of tiny channels in the scalp, temporarily bypassing the skin's barrier layer (stratum corneum). This allows minoxidil to penetrate much deeper into the follicle than surface application alone. The researchers proposed this as the primary mechanism: the same dose of minoxidil reaches more follicle stem cells when the delivery pathway is opened.
2. Growth factor release through wound healing
The controlled micro-injuries trigger the body's wound healing cascade, releasing platelet-derived growth factor (PDGF), epidermal growth factor (EGF), and fibroblast growth factor (FGF). These growth factors activate dermal papilla cells — the specialised cells at the base of each follicle that control the hair growth cycle. This creates a double benefit: the minoxidil stimulates follicles from one pathway while the body's own growth factors stimulate them from another.
3. Stem cell activation via Wnt pathway
The researchers referenced evidence that microneedling activates the Wnt/β-catenin signalling pathway — a key molecular switch that determines whether hair follicle stem cells enter the growth phase (anagen). This may explain why microneedling helped patients who had already failed standard treatment: it recruited dormant stem cells that minoxidil alone could not reach.
4. Increased blood supply
The micro-injuries stimulate angiogenesis (new blood vessel formation) around hair follicles, improving nutrient delivery to the dermal papilla. This complements minoxidil's known vasodilatory effect, creating more robust blood flow to the follicular unit. Research on GHK-Cu copper peptides shows similar angiogenic effects, which is why many clinicians now explore combinations of microneedling with growth-factor-rich serums.
Putting the Numbers in Context
A gain of 91.4 hairs per cm² is substantial. To put this in perspective:
The result from this study is notably higher than what later meta-analyses found when pooling multiple trials. This may reflect the specific study population (treatment-responsive Indian males), the aggressive 1.5 mm needle depth, or the weekly treatment frequency. Subsequent studies have generally confirmed the direction of the effect (microneedling significantly improves outcomes) while showing more moderate absolute numbers — typically an additional 30–40 hairs/cm² beyond minoxidil alone across diverse populations.
The 82% patient satisfaction rate stands out. Even if absolute hair counts vary between studies, the consistency of patient-reported improvement suggests the treatment produces cosmetically meaningful results that patients notice in the mirror — not just under a microscope.
How This Study Compares to Other Research
The Dhurat 2013 study ignited the field. Every subsequent meta-analysis — pooling hundreds to thousands of patients — has confirmed the core finding: adding microneedling to topical treatment produces significantly better results than topical treatment alone. The debate now focuses on optimal needle depth, frequency, and which topical agents work best in combination.
Important: This protocol was performed in a clinical setting by trained dermatology professionals. At-home microneedling devices typically use shorter needles (0.25–0.5 mm) and carry different risk profiles. Always consult a healthcare professional before attempting any microneedling protocol.
Research Limitations
What This Means for Your Hair
This study established a principle that has since been confirmed by multiple large meta-analyses: microneedling combined with topical treatment is significantly more effective than topical treatment alone.
If you are currently using minoxidil and finding the results underwhelming, this research suggests that adding microneedling could substantially improve your outcome. The 82% satisfaction rate in the microneedling group — compared to 4.5% with minoxidil alone — indicates that the additional improvement is not just measurable under a microscope, but visible in the mirror.
The finding that microneedling helped previously treatment-resistant patients is particularly encouraging. If you have tried minoxidil or finasteride without success, this study suggests that adding microneedling may reactivate follicles that did not respond to medication alone.
For the best evidence-based approach, consider combining microneedling with science-backed topical formulations. Research on copper peptides like AHK-Cu and GHK-Cu shows these ingredients work through complementary biological pathways to minoxidil — activating dermal papilla cells and protecting follicles from premature cell death. The Kuceki et al. 2025 study specifically demonstrated that combining microneedling with copper peptide serums produced significant improvement in treatment-resistant alopecia.
Key Terms Explained
Frequently Asked Questions
How much more effective is microneedling + minoxidil compared to minoxidil alone?
In this study, the combination produced approximately 4 times more hair growth than minoxidil alone: +91.4 hairs/cm² vs +22.2 hairs/cm². Later meta-analyses pooling multiple studies show a more conservative but still significant advantage of approximately 1.5–2× improvement. The specific benefit depends on individual factors like hair loss severity, needle depth, and treatment consistency.
What needle length was used, and does depth matter?
This study used 1.5 mm needles, which penetrate into the dermis where hair follicle stem cells reside. The Gupta 2022 meta-analysis identified 1.5 mm as potentially optimal, though the Faghihi 2021 study found that 0.6 mm performed equally well as 1.2 mm, suggesting deeper is not necessarily better. For home use, most at-home devices use 0.25–0.5 mm, which may be sufficient for enhanced product absorption but may not provide the full wound-healing benefits of clinical-depth needling.
How often should microneedling be done for hair growth?
This study used weekly sessions. Most subsequent studies have also used weekly or biweekly protocols. It is important to allow enough time between sessions for the scalp to heal — the wound healing response itself is part of the mechanism. Most dermatologists recommend every 1–2 weeks for 1.0–1.5 mm depths, and more frequently (every few days) for shallower depths (0.25–0.5 mm).
Can I do microneedling at home, or does it need to be done professionally?
The study was performed in a clinical setting with professional-grade 1.5 mm dermarollers. At-home devices typically use shorter needles (0.25–1.0 mm) and are generally considered safe when used correctly with proper sterilisation. However, the clinical results may not be fully replicable at home with shorter needles. Always consult a healthcare professional before starting microneedling, especially at deeper depths.
Does microneedling for hair loss hurt?
At the 1.5 mm depth used in this study, patients typically experience mild discomfort and the scalp turns mildly red (erythema) — which was actually the treatment endpoint. In the clinical setting, topical anaesthesia may be applied beforehand. At-home use with shorter needles (0.25–0.5 mm) produces a tingling or prickling sensation that most users describe as tolerable. No significant adverse effects were reported in this 100-patient trial.
Can I apply minoxidil immediately after microneedling?
In this study, patients were specifically instructed to skip minoxidil on the day of microneedling and resume it 24 hours later. This is a precaution because the micro-channels created by needling increase absorption significantly, which could increase the risk of systemic side effects from minoxidil. Most dermatologists recommend waiting 12–24 hours after microneedling before applying minoxidil or other topical treatments.
Does microneedling work for female pattern hair loss?
This study only included men. However, the Pei et al. 2024 meta-analysis included studies with female participants and found that microneedling + topical treatment was superior to topical alone across both sexes. Emerging research, including the Moftah et al. 2013 mesotherapy study on female hair loss, suggests that scalp stimulation therapies generally help in female pattern hair loss as well, though dedicated large-scale trials are needed.
How long before I see results from microneedling for hair loss?
In this study, new hair growth was visible by week 6 in the microneedling group, compared to week 10 for minoxidil alone. Rapid growth of existing hairs was observed as early as week 1. Most dermatologists recommend committing to at least 12 weeks (3 months) of consistent treatment before judging results, as this is the typical timeframe for one full hair growth cycle to complete.
Dhurat R, Sukesh M, Avhad G, Dandale A, Pal A, Pund P. A Randomized Evaluator Blinded Study of Effect of Microneedling in Androgenetic Alopecia: A Pilot Study. International Journal of Trichology. 2013;5(1):6-11. doi:10.4103/0974-7753.114700. PMID: 23960389. PMC: PMC3746236.
Hairgenetix Research Hub. "Microneedling for Hair Loss: The Landmark 2013 Study That Changed Everything — A Plain-Language Summary of Dhurat et al. (2013)." Hairgenetix, 2025. Available at: https://hairgenetix.com/blogs/articles/microneedling-hair-loss-landmark-study-dhurat-2013