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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® highlighting the ophthalmologist-tested formula safe for contact lens wearers and sensitive eyes.
Real 30-day clinical results showing increased lash fullness and length using MD Lash Factor®; safe for sensitive eyes and visual acuity.
Dr. Susan Lin, M.D., Physician-Inventor and expert reviewer for the Medical Board of California, is the clinical mind behind MD® products.
Clinical chart comparing MD Lash Factor® safety profile to competitors, proving no change in intraocular pressure or visual acuity.
Scientific breakdown of MD Lash Factor® ingredients, including Thiotaine, peptides, and growth factor, available for maximum ocular safety.
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® highlighting the ophthalmologist-tested formula safe for contact lens wearers and sensitive eyes.
Real 30-day clinical results showing increased lash fullness and length using MD Lash Factor®; safe for sensitive eyes and visual acuity.
Dr. Susan Lin, M.D., Physician-Inventor and expert reviewer for the Medical Board of California, is the clinical mind behind MD® products.
Clinical chart comparing MD Lash Factor® safety profile to competitors, proving no change in intraocular pressure or visual acuity.
Scientific breakdown of MD Lash Factor® ingredients, including Thiotaine, peptides, and growth factor, available for maximum ocular safety.
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® highlighting the ophthalmologist-tested formula safe for contact lens wearers and sensitive eyes.
Real 30-day clinical results showing increased lash fullness and length using MD Lash Factor®; safe for sensitive eyes and visual acuity.
Dr. Susan Lin, M.D., Physician-Inventor and expert reviewer for the Medical Board of California, is the clinical mind behind MD® products.
Clinical chart comparing MD Lash Factor® safety profile to competitors, proving no change in intraocular pressure or visual acuity.
Scientific breakdown of MD Lash Factor® ingredients, including Thiotaine, peptides, and growth factor, available for maximum ocular safety.
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MD Lash Factor

MD Lash Factor® Eyelash Conditioner | Physician-Invented by Dr. Susan Lin

$99.00

Physician-Invented | Patent-Backed | Ophthalmologist-Tested

MD Lash Factor® is the original physician-formulated eyelash conditioner, developed by Dr. Susan Lin, M.D., to provide a medical-grade alternative to harsh, chemical-heavy serums. Protected by US Patent 8,206,695, our clinical formula utilizes a bio-active blend of peptides and Thiotaine to nourish the lash follicle naturally, promoting the appearance of longer, fuller, and thicker lashes.

Why Doctors Choose MD®:

  • Safety Without Compromise: Independently tested and clinically validated to have zero impact on visual acuity or intraocular pressure.
  • Sensitive Eye Approved: A gentle, non-irritating formula safe for contact lens wearers and those with chronic eye sensitivity.
  • Clinically Proven Results: 95% of participants in independent clinical trials reported visible improvements in lash volume and vitality within 4-6 weeks.
  • Clean Medical Science: Free from parabens, hormones, and harsh drugs. Our formula is pH-balanced to mimic the natural environment of the eye.

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.

 

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

Reveal Longer, Healthier Lashes—No Extensions Needed

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.

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Transform Your Lash Routine with MD Lash Factor

Transform Your Lash Routine with MD Lash Factor

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Transform your lash routine with MD Lash Factor Eyelash Conditioner! Clinically tested and ophthalmologist-approved, this award-winning formula promotes longer, thicker, and fuller lashes in just 6 weeks. Packed with biotin, peptides, and botanicals, it nourishes lashes, reduces breakage, and hydrates with Vitamin B5. Simply apply a thin line to your upper lash line before bed—safe for sensitive eyes and contact lens wearers. Say goodbye to falsies and hello to naturally beautiful lashes!
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Unlock the Power of MD Lash Factor: The Science Behind Gorgeous Lashes MD Lash Factor is not your average lash serum. Powered by a patented formula featuring botanical extracts, peptides, and vitamins, this clinically tested solution promotes healthier, thicker, and longer lashes. Designed by physicians, it strengthens from the root, nourishes with essential nutrients, and protects against environmental stress. Say goodbye to falsies and extensions—experience real lash transformation in just 6 weeks. Discover the secret to natural, resilient lashes with MD Lash Factor today!
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Frequently Asked Questions

Yes. MD Lash Factor is suitable for adult men and women (18+) and is safe for all skin types.

It depends on the cause. If thinning is due to age, stress, lash extensions, or cosmetic damage, eyelash conditioners like MD Lash Factor can support the appearance of fuller-looking lashes over time.

No. For optimal results, apply just once daily to the upper lash line using the included precision applicator

Yes, once your lashes become naturally stronger and longer, many users find they rely less on curlers or extensions. Always apply MD Lash Factor® on clean lashes before other products.

Use within 6 months of opening, as with any eye-area cosmetic product.

LEARN MORE
MD®: Advanced Clinical Science. The official home of MD Lash Factor® and MD Hair™.

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© 2026 La Canada Ventures, Inc. All rights reserved. MD®, MD Lash Factor®, and MD Factor® are registered trademarks of La Canada Ventures, Inc. MD Hair™, MD Lash™, MD Skin™, and MD Wellness™ are trademarks of La Canada Ventures, Inc.
® denotes a trademark registered in the U.S.

Physician‑formulated by Dr. Susan Lin, M.D.
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