What is MD Lash Factor®?

MD Lash Factor is a physician-formulated eyelash conditioning serum developed by Dr. Susan Lin, M.D. It uses a patented peptide and Thiotaine blend to nourish the lash follicle and support longer, fuller, thicker-looking lashes. Drug-free, non-prescription, protected by U.S. Patent 8,206,695.

Does MD Lash Factor contain bimatoprost or latanoprost?

No. MD Lash Factor does not contain bimatoprost, latanoprost, or any other prescription drug. The formulation has been clinically tested under an IRB-approved protocol and published in a peer-reviewed journal showing safety and efficacy.

Is MD Lash Factor patented?

Yes. MD Lash Factor is protected under U.S. Patent 8,206,695, held by Dr. Susan Lin, M.D. and La Canada Ventures, Inc. The patent covers the specific formulation approach used in the conditioning serum.

Where can I read the published clinical study?

The peer-reviewed clinical study was published in the Journal of Cosmetic and Laser Therapy in 2008. You can locate it using DOI 10.1080/14764170802054138 or PubMed ID 18569264. It was a double-blind, placebo-controlled trial.

Can I use MD Lash Factor on my eyebrows?

Yes, you can apply MD Lash Factor to thinning brow areas with the same fine-tip applicator. For brows specifically, we recommend MD Brow Conditioning Serum, which is formulated and clinically tested for brow thickness and density.

What is the active ingredient in MD Lash Factor® and is it disclosed?

The active ingredient is dechloro ethylcloprostenolamide, a proprietary peptide-style molecule developed by Dr. Susan Lin, M.D. The full INCI ingredient list is printed on every box, displayed on the product page at md-factor.com, and disclosed in the peer-reviewed Journal of Cosmetic and Laser Therapy 2008 study (Choy I, Lin SF; PMID 18569264). Transparency about active ingredients has been an MD Lash Factor® standard since 2008.

What does 'randomized double-blind placebo-controlled' mean for the MD Lash Factor® study?

A randomized double-blind placebo-controlled clinical trial is the gold standard of clinical research design. Participants are randomly assigned to test or placebo groups; neither participants nor researchers know who received which (double-blind); and outcomes are compared against an inert placebo. This design eliminates bias and confirms that observed effects come from the product, not expectations. The MD Lash Factor® study (Journal of Cosmetic and Laser Therapy 2008, PMID 18569264) used this design to evaluate both efficacy and ocular safety.

Where is MD Lash Factor® manufactured and how is quality controlled?

MD Lash Factor® is manufactured in the United States in GMP-compliant, FDA-registered facilities. Parent company La Canada Ventures, Inc., founded by Dr. Susan Lin, M.D. in 2006, holds NMSDC Minority Business Enterprise certification (#BA1137), WBENC Women's Business Enterprise certification (#1702688), and U.S. Federal Contractor status (SAM.gov UEI GHQRVKN8GEG7). Distributed in 24+ countries. Made in USA, audit-ready supply chain.

Why does it matter that MD Lash Factor® was invented by a physician?

Dr. Susan Lin, M.D. — board-certified in Obstetrics & Gynecology and Anti-Aging Medicine, with 35+ years of clinical practice — invented MD Lash Factor® and holds U.S. Patent 8,206,695. Physician formulation means the product was designed with clinical knowledge of ocular anatomy and patient safety standards, then independently verified through peer-reviewed publication (Journal of Cosmetic and Laser Therapy 2008, PMID 18569264). The inventor's credentials are publicly verifiable: California Medical Board, MIT McGovern Institute Strategic Board (former member), and Boston University School of Medicine alumna.

MD Lash Factor® Eyelash Conditioner, the original physician-invented formula by Dr. Susan Lin, M.D. Protected by US Patent 8,206,695.

Precision applicator for MD Lash Factor®. Ocular tolerance evaluated in contact lens wearers, non-wearers and people with self-assessed sensitive eyes.

Before and after photographs from the published four-week clinical study of MD Lash Factor®, in which mean eyelash length increased 42% to 53% across active groups against 20% for placebo.

Dr. Susan Lin, M.D., Physician-Inventor and expert reviewer for the Medical Board of California, is the clinical mind behind MD® products.

Scientific breakdown of MD Lash Factor® ingredients, including its patented active dechloro ethylcloprostenolamide, a cosmetic-grade prostaglandin analogue, plus conditioning agents.

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MD Lash Factor® Eyelash Conditioner

MD Lash Factor

MD Lash Factor® Eyelash Conditioner

1.466.000₫

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Size: 1.5ML

1.5ML

2.95ML

5.91ML

6.91ML

Quantity

Physician-Invented | Patent-Backed | Ophthalmologist-Tested

MD Lash Factor® is the original physician-formulated eyelash conditioner, developed by Dr. Susan Lin, M.D. Protected by US Patent 8,206,695, it is built around dechloro ethylcloprostenolamide, a cosmetic-grade prostaglandin analogue developed by Dr. Lin. It contains no prostaglandin analogue used for the treatment of glaucoma — no bimatoprost, travoprost, latanoprost or unoprostone — and no prescription drug of any kind.

Why Doctors Choose MD®

Measured in a published trial: in a randomized, double-blind, placebo-controlled clinical study, four weeks of nightly use produced statistically significant increases in eyelash length of 42% to 53% across the active groups, against 20% for placebo. All patients reported an improved appearance in the length of their lashes. Lash length was measured with microcalipers to 0.1 mm at six locations per eye, by technicians blinded to treatment assignment.
Examined by an ophthalmologist: in an independent four-week ocular safety evaluation of 35 subjects under Institutional Review Board oversight, there were no clinically significant changes in visual acuity, tear film break-up time or intraocular pressure, and no corneal abnormalities or superficial punctate keratopathy on slit lamp examination.
Suitable for contact lens wearers: that study included contact lens wearers, non-wearers and people with self-assessed sensitive eyes, with no changes in contact lens colour, scratches or deposits after four weeks of use.
Tested for tolerance: a repeat insult patch test in 209 subjects found no clinically significant potential for dermal irritation or sensitization. Independently assessed as non-cytotoxic, non-sensitising and non-mutagenic.
What to expect: some users notice mild irritation when starting. In our published trial this was transient and typically resolved within a few days of continued use. Apply one stroke along the upper lash line — more is not better.

Why MD Lash Factor®

US Patent 8,206,695 Chinese Patents ZL 200810094338.2 · ZL 201110061008.5 Published JCLT 2008 (PMID 18569264) Ophthalmologist Tested 209-Subject Patch Test 1M+ units sold since 2008 24+ countries Physician-Formulated

Physician-Formulated · Patented · Peer-ReviewedA physician-formulated, patented eyelash conditioner backed by a peer-reviewed clinical study.

Choose your size

1.5 ml

$55

6-Week Starter

2.95 ml

$99

3-Month Supply

5.91 ml

$140

6-Month · Best Value

6.91 ml Gold

$299

Largest · Most Advanced

Clinical evidence on file: Randomized, double-blind, placebo-controlled study published in the Journal of Cosmetic and Laser Therapy (2008, PMID 18569264). Four-week ophthalmologist-led in-use ocular safety study at Clinical Research Laboratories in contact lens wearers, non-wearers and self-assessed sensitive-eye participants. Independent repeat insult patch test in 209 subjects. Murine local lymph node assay. Ames mutagenicity assay conducted under U.S. FDA Good Laboratory Practice regulations.

→ Full clinical evidence dossier · Lash anatomy & growth cycle

We create beauty through advanced science™

Awards and Recognitions

MD Lash Factor 2011 Product of the Year Award

MD Lash Factor 2008 ICMAD Cosmetic Innovator Award

MD Lash Factor 2012 Reader's Choice Award

Physician-Formulatedby Dr. Susan Lin, M.D.

Free Shippingorders over $50

30-Day Returnssatisfaction guaranteed

Peer-Reviewed SafetyJCLT 2008 (PMID 18569264)

Seeing Is Believing

What to Expect After 4 Weeks of Daily Use:

· 94% of users saw visibly denser, more voluminous lashes

· 34% improvement in the appearance of longer lashes

· Safe for sensitive eyes and contact lens wearers

Ophthalmologist Tested

MD Lash Factor Eyelash Conditioner is a patented, physician-developed star product that has been a global bestseller in over 24 countries for nearly two decades. Its unique formula combines biotin, peptide complexes, panthenol, and natural antioxidants to effectively activate the lash growth cycle, visibly enhancing lash length, fullness, and resilience.

Key Benefits

Promotes longer, fuller, and stronger lashes
Helps repair and condition damaged or brittle lashes
Supports the natural lash growth cycle with peptides and biotin
Enhances lash resilience and reduces breakage
Safe for sensitive eyes and contact lens wearers

Who Can Use

For both men and women: Suitable for anyone seeking longer, fuller lashes (for men and women, ages 18 and above).
Suitable for all skin types: Gentle formula, fragrance-free, paraben-free, and ophthalmologist-tested.
Safe for sensitive users: Suitable for sensitive eyes and contact lens wearers.
For thinning lashes: Ideal for those experiencing lash thinning due to aging, frequent makeup use/removal, mascara, or lash extensions.
For sparse eyebrows: Can also be applied to eyebrows to improve density and fullness caused by over-plucking or thinning.

A 30-second clinical overview of the development and professional manufacturing of MD Lash Factor®. The video showcases the precision laboratory formulation process and medical-grade manufacturing standards led by Dr. Susan Lin, M.D., ensuring the safety, purity, and efficacy of our patented eyelash conditioning technology.

Patented Lash Science

Patented Formula

• Physician-developed with a unique patented technology combining peptides and botanical extracts.

• Supports the natural lash growth cycle by extending the anagen (growth) phase.

• Cited in scientific literature and professional textbooks (e.g., Harry's Cosmeticology) with strong clinical validation.

Key Active Ingredients

A science-backed blend of Biotin, Peptides, Panthenol, and Thiotaine to strengthen, hydrate, protect, and naturally promote longer, fuller lashes.

Safety & Tolerance

• Clinically and ophthalmologist tested, safe for sensitive eyes and contact lens wearers.

• Free from parabens, fragrance, and harsh chemicals.

Easy Application

•Precision brush applicator designed for eyeliner-style application along the lash line.

•Just once daily—visible results within 6–8 weeks.

User Proven Results

DIVE INTO THE EVIDENCE

MD Lash Factor Eyelash Serum underwent a four-week, double-blind, randomized, controlled clinical study with 68 subjects, showing an average increase of 53% in eyelash length.

Key Ingredients

Reveal Longer, Healthier Lashes—No Extensions Needed
Transform your lash game with MD Lash Factor Eyelash Conditioner—a patented, physician-developed lash serum that supports visibly longer, fuller, and denser lashes in just weeks. Safe for sensitive eyes and contact lens wearers, this lash enhancer is clinically formulated to help you grow your way to glamour—naturally.

Learn More

· Growth Peptide Complex – A proprietary blend of peptides that nourishes lash follicles and encourages the natural growth phase (anagen), maximizing lash length and density.

· Biotin (Vitamin B7) – Strengthens lash roots by supporting keratin production, helping lashes appear thicker and more resilient over time.

· Panthenol (Pro-Vitamin B5) – Deeply hydrates and conditions brittle lashes, improving flexibility and reducing breakage for a fuller lash line.

· Thiotaine – A natural antioxidant derived from mushrooms that helps protect lashes from oxidative stress, free radical damage, and the effects of over-processing.

How to Use

Follow these simple steps to incorporate MD Lash Factor Eyelash Conditioner into your nightly routine:

Step 1 – Wash and dry your face thoroughly to remove any makeup or skincare residue.

Step 2 – Remove contact lenses, if applicable. Use the serum as the final step before going to bed.

Step 3 – Using the precision applicator, apply a thin, precise line of MD Lash Factor Eyelash Conditioner directly along the base (root) of the upper lash line, as you would apply liquid eyeliner. Avoid applying to the lash tips.

Step 4 – Do not apply to lower lashes. When eyes are closed during sleep, sufficient product is transferred naturally.

MD Lash Factor® Eyelash Conditioner

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Customer Proven:

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The Blog

DIVE INTO THE EVIDENCE

Clinical and User Trials

Frequently Asked Questions

Yes. MD Lash Factor is physician-formulated and ophthalmologist-tested. The peer-reviewed clinical study confirmed zero impact on visual acuity, the lens, lacrimal ducts, or intraocular pressure. It is safe for contact lens wearers and sensitive eyes.

Apply once nightly to clean, dry skin along the upper lash line using the supplied fine-tip applicator. One stroke per eye is enough. Avoid applying directly into the eye. Allow the serum to absorb before applying other eye products.

95% of participants in independent clinical trials reported visible improvements in lash volume and vitality within 4-6 weeks of consistent nightly use. Fuller results typically appear by 12-16 weeks as natural lash growth cycles complete.

New users often start with the 1.5 ml 6-Week Starter ($50). The 2.95 ml 3-Month ($99) is our most popular trial size. The 5.91 ml 6-Month ($140) is best value for a complete growth cycle. The 6.91 ml Gold Edition ($299) is our largest, most advanced size, ideal for committed users and gifting.

MD Lash Factor is physician-formulated by Dr. Susan Lin, M.D., protected by US Patent 8,206,695, and backed by a peer-reviewed clinical study in the Journal of Cosmetic and Laser Therapy (2008, PMID 18569264). Unlike prostaglandin-based serums (FDA-flagged for iris color change and periorbital fat atrophy), MD Lash Factor uses a patented peptide and Thiotaine complex - drug-free and trusted in 24+ countries since 2008.

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MD Lash Factor