What's in the MD® Lash + Brow Duo?

The MD® Lash + Brow Duo is a two-product bundle: MD Lash Factor® Eyelash Conditioner in the 1.5 ml size, and MD® Brow Conditioning Serum in the 3 ml size. Both are cosmetic conditioning serums physician-formulated by Dr. Susan Lin, M.D. The lash conditioner is applied along the upper lash line; the brow serum is applied through the brows. The Duo is $107.

How much do I save vs buying separately?

Bought separately, MD Lash Factor® Eyelash Conditioner 1.5 ml is $55 and MD® Brow Conditioning Serum 3 ml is $69, a total of $124. The MD® Lash + Brow Duo is $107, so you save $17 — about 14% off the separate prices. Prices shown are the current U.S. site prices and may change.

Does the MD® Lash + Brow Duo contain bimatoprost or any prescription drug?

No. Neither product is a drug. The active in MD Lash Factor® is dechloro ethylcloprostenolamide, a cosmetic-grade prostaglandin analogue developed by Dr. Susan Lin, M.D. and protected by U.S. Patent 8,206,695 — it is not bimatoprost and not latanoprost. MD® Brow Conditioning Serum is prostaglandin-free and drug-free, using peptide and botanical actives.

How do I apply the Duo?

Once daily at night, on clean dry skin. Remove eye makeup and contact lenses. Draw one thin line of MD Lash Factor® along the base of the upper lash line with the precision applicator — not on the tips, not on the lower lashes. Sweep one light stroke of MD® Brow through each brow, focusing on sparse-looking areas. Allow 2–3 minutes to absorb before any other product.

What happens if I stop using the Duo?

These are cosmetic conditioners for the lashes and brows you already have, so continued use is what maintains the look. Once you stop applying them, lashes and brows gradually return to their original appearance as they cycle. Individual results vary.

Who formulated the MD® Lash + Brow Duo?

Both products were formulated by Dr. Susan Lin, M.D., founder of the MD® brand and inventor on U.S. Patent 8,206,695 (Eyelash Enhancement Composition and Method of Treatment). MD Lash Factor® is ophthalmologist-tested and was the subject of a peer-reviewed 2008 study in the Journal of Cosmetic and Laser Therapy (PMID 18569264); MD® Brow Conditioning Serum is dermatologist-tested and was evaluated in a 56-day independent consumer-use study at Spincontrol North America Inc.

MD® Lash + Brow Duo

A woman applying MD® Eyebrow Conditioner using the precision applicator to clean, dry brows for nightly nourishment.

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.

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MD® Lash + Brow Duo

MD® Lash + Brow Duo

$107.00

$119.00

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Why MD® Lash + Brow Duo

Physician-Formulated by Dr. Susan Lin, M.D. Published 2008 Clinical Study (JCLT) US Patent 8,206,695 56-Day Clinical Evaluation Save $17 vs. Buying Separately Award-Winning Cosmo BOTB 2023+2024

The complete eye-frame protocol — physician-formulated for fuller-looking lashes and more defined brows.

What's Included

MD Lash Factor® Eyelash Conditioner — 1.5 ml — The original physician-formulated lash conditioner, protected by US Patent 8,206,695 and the subject of a peer-reviewed 2008 clinical study published in the Journal of Cosmetic and Laser Therapy (PMID 18569264). Ophthalmologist-tested. Supports the appearance of longer, fuller lashes.
MD® Brow Conditioning Serum — 3 ml — Evaluated in a 56-day independent consumer-use study at Spincontrol North America Inc. (Patrick Beau, Ph.D., Lead Investigator): 78% of participants agreed their eyebrows seemed thicker and more conditioned and 87% agreed the product did not irritate their eyes or skin (participant self-assessment). Prostaglandin-free. For brows that look fuller and more defined.

$124$107
Save $17 on the complete eye-frame protocol — $124 if bought separately

How to use the Duo: Apply MD Lash Factor® to clean, dry lash lines once daily before bed. Apply MD® Brow Conditioning Serum to clean, dry brows once daily. Allow 2–3 minutes to absorb. Be consistent — allow 8–12 weeks of nightly use before judging the look. Individual results vary.

Clinical Evidence:

→ Full MD® Lash Factor clinical evidence dossier

→ Full MD® Brow clinical evidence dossier

We create beauty and wellness through advanced science™

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

Free ShippingU.S. orders $99+ · International $140+

30-Day Returnssatisfaction guaranteed

Peer-Reviewed SafetyJCLT 2008 (PMID 18569264)

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MD® Lash + Brow Duo

The complete eye-frame protocol — physician-formulated by Dr. Susan Lin, M.D.

Lashes and brows frame the eye together, so the Duo pairs the two conditioners built for them. MD Lash Factor® Eyelash Conditioner (1.5 ml) conditions the upper lash line for the appearance of longer, fuller lashes. MD® Brow Conditioning Serum (3 ml) is formulated for the thicker, coarser hairs of the brow, for a fuller-looking, more defined shape. Bought separately the two are $124; the Duo is $107 — a $17 saving.

Key Benefits

One nightly ritual: one stroke along each upper lash line, one light stroke through each brow. About sixty seconds.
Two formulas, not one serum used twice: each is built for its own anatomy.
Prostaglandin-free brow formula: MD® Brow contains no bimatoprost, latanoprost or minoxidil.
Tested: MD Lash Factor® is ophthalmologist-tested; MD® Brow is dermatologist-tested and was evaluated in a 56-day independent consumer-use study.
Physician-formulated by Dr. Susan Lin, M.D. Fragrance-free and paraben-free.

Cosmetic conditioners for the lashes and brows you have. Individual results vary.

Two Formulas, One Eye-Frame Protocol

Why lashes and brows are conditioned with two different formulas, not one serum used twice.

MD Lash Factor® Eyelash Conditioner — 1.5 ml

· The active ingredient is dechloro ethylcloprostenolamide, a cosmetic-grade prostaglandin analogue developed by Dr. Susan Lin, M.D., supported by biotin, peptides, panthenol and thiotaine.

· Applied along the upper lash line with a precision applicator to condition the lash line for the appearance of longer, fuller lashes.

· Protected by U.S. Patent 8,206,695 and the subject of a peer-reviewed 2008 clinical study published in the Journal of Cosmetic and Laser Therapy (Choy I, Lin SF; PMID 18569264).

MD® Brow Conditioning Serum — 3 ml

· A peptide- and vitamin-based concentrate formulated for the thicker, coarser hairs of the brow, to condition brow hairs for a fuller-looking, more defined shape.

· Prostaglandin-free and drug-free: no bimatoprost, latanoprost or minoxidil.

· Dermatologist-tested and evaluated in a 56-day independent consumer-use study at Spincontrol North America Inc. (Patrick Beau, Ph.D., Lead Investigator).

Safety & Tolerance

· MD Lash Factor® is ophthalmologist-tested. In an independent four-week ocular safety evaluation of 35 subjects under Institutional Review Board oversight with board-certified ophthalmologist supervision, no clinically significant change in visual acuity, tear film break-up time or intraocular pressure was observed under study conditions.

· In the 56-day brow study, 87% of participants agreed the product did not irritate their eyes or skin (participant self-assessment).

· Both formulas are fragrance-free and paraben-free.

What to Expect

DIVE INTO THE EVIDENCE

Lashes and brows renew on their own cycles, so the Duo is a slow, steady routine rather than an overnight change. An honest timeline:

Weeks 1–4: Little visible change. Your lashes and brows are still in their existing cycle. Focus on applying both every night.
Weeks 4–8: Lashes and brows usually look better conditioned — smoother, less brittle and easier to shape.
Weeks 8–12: In the 56-day (8-week) independent consumer-use study of MD® Brow, 78% of participants agreed their eyebrows seemed thicker and more conditioned and 87% agreed their brows seemed healthier and better hydrated. These are participant self-assessments.
Ongoing: These are cosmetic conditioners for the lashes and brows you have. When you stop applying them, the look gradually returns to where it started.

Individual results vary with your own lash and brow cycles and with how consistently you apply. Give the Duo 8–12 weeks of nightly use before judging it.

Key Ingredients

Two Physician-Selected Formulas, One Eye Frame
The Duo pairs the actives in MD Lash Factor® with the peptide-based concentrate in MD® Brow Conditioning Serum. Every ingredient was chosen to condition the hairs you already have — for lashes that look longer and fuller and brows that look fuller and more defined.

Learn More

· Dechloro Ethylcloprostenolamide – In MD Lash Factor®. The patented active (U.S. Patent 8,206,695), a cosmetic-grade prostaglandin analogue developed by Dr. Susan Lin, M.D. and the compound evaluated in the published 2008 clinical study.

· Bioactive Peptides – In MD® Brow. Short chains of amino acids that help condition and protect brow hairs and help prevent breakage, for a more defined, natural-looking brow.

· Biotin (Vitamin B7) – In both formulas. Supports keratin production in the hairs you have, helping lashes and brows look thicker and more resilient over time.

· Panthenol (Pro-Vitamin B5) – In both formulas. Hydrates and conditions brittle lashes and brow hairs, improving flexibility and reducing breakage for a fuller-looking lash line and brow.

· Thiotaine – In MD Lash Factor®. 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 the Duo

Two products, one nightly routine — about sixty seconds before bed.

MD® Lash + Brow Duo is used once daily, at night, on clean dry skin. Apply the lash conditioner first, then the brow serum.

Prep: Cleanse and dry your face completely. Remove all eye makeup and skincare residue, and take out contact lenses.
Lashes: With the MD Lash Factor® precision applicator, draw one thin line along the base of the upper lash line, as you would liquid eyeliner. Do not apply to the lash tips and do not apply to the lower lashes.
Brows: With the MD® Brow applicator, sweep one light stroke through each brow, concentrating on sparse-looking areas.
Set: Allow 2–3 minutes to absorb before any other product. One stroke per eye and one per brow is enough — more product does not do more.
Consistency: Use both every night. Participants in the 56-day brow study assessed their brows at 8 weeks; allow 8–12 weeks before judging the full look. Individual results vary.

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

MD Lash Factor® Eyelash Conditioner

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From$55.00

MD® Eyebrow Conditioner by Susan F. Lin, M.D. with its precision applicator, shown with ICMAD City Awards and 2012 Launchpad Readers' Choice award badges

MD® Brow

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$69.00

MD® Lash & Brow Brush

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$20.00

MD® Eyelash Curler – Precision lash curler for lifted, curled lashes, ideal for use with MD Lash Factor®

MD® Lash Curler

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$30.00

Customer Proven:

Real Results from MD Lash,MD Hair,MD Wellness

The Blog

WRITTEN BY OUR PHYSICIAN

Guides from Dr. Susan Lin, M.D.

Frequently Asked Questions

The Duo contains MD Lash Factor® Eyelash Conditioner in the 1.5 ml size and MD® Brow Conditioning Serum in the 3 ml size. Both are physician-formulated by Dr. Susan Lin, M.D. Bought separately they are $55 and $69, $124 in total; the Duo is $107.

Allow 8–12 weeks of nightly use. In the 56-day independent consumer-use study of MD® Brow, 78% of participants agreed their eyebrows seemed thicker and more conditioned and 87% agreed their brows seemed healthier and better hydrated (participant self-assessment). Lashes and brows renew on their own cycles, so consistency matters more than quantity. Individual results vary.

Yes — that is how the Duo is designed to be used. Apply MD Lash Factor® along the upper lash line and MD® Brow through each brow, once daily at night on clean, dry skin, and allow 2–3 minutes for each to absorb. One stroke per eye and one light stroke per brow is enough; more product does not do more.

MD Lash Factor® is physician-formulated and ophthalmologist-tested. In an independent four-week ocular safety evaluation of 35 subjects under Institutional Review Board oversight with board-certified ophthalmologist supervision, no clinically significant change in visual acuity, tear film break-up time or intraocular pressure was observed under study conditions. MD® Brow is dermatologist-tested; in the 56-day study 87% of participants agreed it did not irritate their eyes or skin. Remove contact lenses before applying. If you wear contact lenses, have an eye condition or are under an eye care professional's care, check with them before use.

Bought separately, MD Lash Factor® 1.5 ml is $55 and MD® Brow Conditioning Serum 3 ml is $69 — $124 in total. The MD® Lash + Brow Duo is $107, so you save $17. Prices shown are the current U.S. site prices and may change.

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