Brow Evidence — 56-Day Consumer-Use Study & Safety Data on MD Brow Conditioning Serum

Brow Evidence

56-Day Independent Consumer-Use Study at Spincontrol North America Inc. · Author: Dr. Susan Lin, M.D. · Reviewed: May 2026

Summary of Evidence

MD Brow Conditioning Serum is supported by:

A 56-day independent consumer-use study conducted at Spincontrol North America Inc. with Patrick Beau, Ph.D. as Lead Investigator
Dermatologist-tested; 87% of participants reported no irritation of the eyes or skin under study conditions
Formulated by the same physician, Dr. Susan Lin, M.D. The brow formulation is distinct from MD Lash Factor® and does not contain a prostaglandin analogue.

MD Brow Conditioning Serum does not contain bimatoprost or latanoprost.

Study: MD Brow Conditioning Serum 56-Day Consumer-Use Study

Test material: MD Brow Conditioning Serum
Clinical site: Spincontrol North America Inc.
Lead Investigator: Patrick Beau, Ph.D.
Study type: Independent in-use consumer study; self-assessment questionnaire only, no control group
Duration: 56 days (8 weeks) of daily use
Application: Once daily to clean brows using supplied applicator
Safety designation: Dermatologist-tested; no irritation reported by 87% of participants under study conditions

Self-assessment questionnaire responses after 56 days of daily use

Outcome	% of subjects
Agreed their eyebrows seemed thicker and more conditioned	78%
Agreed their brows seemed healthier and better hydrated	87%
Agreed the product did not irritate their eyes or skin	87%

"In a 56-day independent consumer-use study at Spincontrol North America Inc. (Lead Investigator: Patrick Beau, Ph.D.), 78% of participants agreed their brows seemed thicker and better conditioned; 87% agreed their brows seemed healthier and better hydrated; and 87% agreed the product did not irritate their eyes or skin. These are self-assessment questionnaire responses under study conditions."

What this study supports and doesn't claim

Supports: User-reported improvements in the appearance and condition of the brows after 56 days of consistent daily use, and a high tolerability profile. Density was not measured — the study collected self-assessment questionnaire responses only.
Does not claim: Medical treatment of disease, guaranteed outcomes for every user, or regrowth of brow hair where the follicle is no longer active.
Study limits: Self-assessment responses are subjective; there was no placebo or control group and no instrumental measurement of density; outcomes beyond 56 days are not characterized.

Full study report availability: Independent study report on file. Available to qualified industry partners, healthcare professionals, journalists, and regulatory inquiries on request.

Brow Growth Cycle Context

Brow hair cycles through three phases:

Anagen (growth) — about 4–5 months
Catagen (regression) — about 2–3 weeks
Telogen (rest then shed) — several months

Because the brow growth cycle is short relative to scalp hair, changes in the appearance of conditioned brows are often noticed within weeks. Individual results vary.

Common Questions

Has MD Brow Conditioning Serum been evaluated in a study?The brow formula was evaluated in a 56-day independent consumer-use study at Spincontrol North America Inc. (Lead Investigator: Patrick Beau, Ph.D.). 78% of participants agreed their brows seemed thicker and better conditioned; 87% agreed their brows seemed healthier and better hydrated; 87% reported no irritation. These are self-assessment questionnaire responses under study conditions, not instrumental measurements.

Who conducted the MD Brow study?Spincontrol North America Inc., an independent clinical research organization. Lead Investigator: Patrick Beau, Ph.D.

Is MD Brow suitable for sensitive skin?The product is dermatologist-tested, and 87% of study participants reported no irritation under study conditions. It contains neither bimatoprost nor latanoprost. As with any product used near the eyes, patch test first and discontinue use if irritation occurs.

How long until I see brow results?The study ran for 56 days and characterised nothing beyond it. Many users assess the appearance of their brows at around 8 weeks of consistent daily use. Individual results vary.

Can I use MD Brow after microblading?Generally yes, after the initial 7–14 day healing phase. Follow your technician's specific aftercare timeline.

Can MD Brow help brows thinned by years of over-tweezing?MD Brow is a cosmetic conditioner for existing brow hairs. It will not create new hairs where the follicle is no longer active, and it is not a treatment for hair loss.

Related Clinical Evidence

Explore the clinical evidence behind other MD product categories:

Lash Clinical Evidence →
CRL93007 IRB-reviewed ocular safety evaluation (n=35), 2008 peer-reviewed Journal of Cosmetic and Laser Therapy publication, US Patent 8,206,695, Ames/LLNA/Agarose toxicology, EU Cosmetic Product Safety Report under Regulation (EC) No. 1223/2009
Hair Clinical Evidence →
17-week Spincontrol independent clinical study (hair density assessed by photographic analysis; 71% of subjects reported an improvement in the appearance of their hair and 75% would recommend the product), MD Nutri Hair bioavailability testing, MD Scalp Essential 50-subject repeat insult patch test