Dr. Susan Lin is a board-certified physician in OB/GYN and Anti-Aging Medicine who founded MD®. She trained at Boston University School of Medicine as an NIH Scholar in a six-year accelerated BA/MD program (1985–1991), with clinical fellowship at Memorial Sloan Kettering and MD Anderson, residency and clinical work at Kaiser Permanente, and academic appointment as Assistant Clinical Professor at UCSF School of Medicine. She has practiced medicine for over 35 years.

MD is a physician-formulated beauty and wellness brand created by Dr. Susan Lin, M.D., a board-certified physician with over 35 years of clinical experience. The brand develops patented, clinically tested products for lash conditioning, hair density, skin rejuvenation, and wellness, all manufactured in the United States in GMP-certified facilities under board-certified physician oversight.

MD is owned by La Canada Ventures, Inc., a California corporation founded and led by Dr. Susan Lin, M.D. as CEO. La Canada Ventures holds the patents, trademarks, and intellectual property behind the MD product line.

MD's flagship product, MD Lash Factor®, has been on the market since 2008, when the founding peer-reviewed clinical study was published. The brand has grown over nearly 20 years into a full physician-formulated lash, hair, skin, and wellness line, with patents and trademarks dating back to the late 2000s.

Yes. MD was founded by Dr. Susan Lin, a board-certified physician in OB/GYN and Anti-Aging Medicine with more than 35 years of clinical experience. She personally formulates the products, holds the underlying patents, and serves as Chief Medical Officer of MD Laser & Cosmetics Center in addition to leading La Canada Ventures, Inc.

La Canada Ventures, Inc. owns five verified USPTO trademark registrations: MD (#4,471,494), MD Factor (#6,309,386), MD Lash Factor® (#3,432,309), MD 101 (#3,459,245), and MD by Susan F. Lin M.D. (#5,860,508). International trademarks are also registered through WIPO Madrid Protocol and in Brazil, Korea, and Hong Kong.

Yes. Dr. Lin authored two chapters in Harry's Cosmeticology, 9th Edition (Chemical Publishing Co., ISBN 978-0-8206-0179-3): "Eyelash and Hair Growth Science" and "Skin Rejuvenation." Harry's Cosmeticology is one of the most widely cited reference texts in the cosmetic science industry.

Dr. Lin has served as a Strategic Board member of the MIT McGovern Institute, as an Expert Reviewer for the Medical Board of California, and as an appointee to the U.S. Department of Commerce District Export Council for Northern California. She is also the Founder and Chief Medical Officer of MD Laser & Cosmetics Center.

Dr. Lin trained at Boston University School of Medicine as an NIH Scholar in a six-year accelerated BA/MD program from 1985 to 1991. She completed residency and clinical work at Kaiser Permanente Oakland (1991–1996) and San Francisco (2004–2006), NEMS San Francisco (1995–1999), Memorial Sloan Kettering, MD Anderson, and UCSF School of Medicine.

Yes. Dr. Lin maintains active clinical practice as the Founder and Chief Medical Officer of MD Laser & Cosmetics Center, where she sees patients in addition to her work formulating MD products. She has been in continuous medical practice since 1991.

MD Lash Factor is a physician-formulated eyelash conditioning serum developed by Dr. Susan Lin, M.D. It uses a patented blend of peptides, botanical extracts, and conditioning agents to support the appearance of longer, thicker, healthier-looking lashes. It is drug-free, non-prescription, and protected under U.S. Patent 8,206,695.

MD Lash Factor conditions the lash line with a patented blend of peptides and botanical extracts that support the appearance and health of natural lashes. Unlike prescription lash drugs that act on hormonal pathways, MD Lash Factor is a cosmetic conditioning serum designed by Dr. Susan Lin, M.D. to nourish lashes.

Yes. MD Lash Factor is supported by a peer-reviewed, double-blind, placebo-controlled clinical study published in the Journal of Cosmetic and Laser Therapy in 2008 (DOI 10.1080/14764170802054138; PMID 18569264). The study followed standard clinical-trial protocols and reported on measurable lash improvement compared to placebo.

MD Lash Factor is a cosmetic conditioning serum, not a drug, so it does not require FDA approval. It is manufactured in the United States in a GMP-certified facility registered with the US FDA for cosmetic, food, and drug manufacturing, under board-certified physician oversight.

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

Yes. MD Lash Factor is applied at night using a precise fine-brush applicator along the base of the upper lash line — not in the eye. It was clinically tested under an IRB-approved protocol with an independent ophthalmologist, who confirmed it is safe for contact lens wearers.

Most users begin to see visible improvement in lash appearance within 4 to 8 weeks of consistent nightly use, with fuller results typically observed by 12 to 16 weeks.

Apply MD Lash Factor once nightly to clean, dry skin along the upper lash line using the supplied fine-tip applicator, much like a liquid eyeliner. One stroke per eye is enough. Avoid applying directly into the eye.

Yes, MD Lash Factor can be applied to thinning brow areas. For brows specifically, we recommend MD Brow Conditioner — it is formulated and clinically tested for brow thickness and density.

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.

Yes. MD Lash Factor and the MD brand have received recognition including the ICMAD Award, Cosmopolitan Best of the Best 2024, and the U.S. Department of Commerce Export Excellence award.

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.

MD Hair is a physician-formulated hair density and scalp wellness system developed by Dr. Susan Lin, M.D. It uses a patented combination of lilac stem cell extract, marine collagen, biotin, flaxseed, and vitamin E to support fuller-looking hair and a healthier scalp.

Yes. MD Hair is protected by an international patent portfolio: U.S. Patent Publication 20100249043, PCT/US2010/000843, WIPO Publication WO-2010110863-A2, Korean Publication KR 20120012965-A, Hong Kong Patent HK 1157672, and Chinese Patent CN 101283957.

Minoxidil and finasteride are FDA-approved drugs with required ongoing use and possible side effects. MD Hair is a drug-free, physician-formulated cosmetic and nutraceutical system using a patented blend of plant stem cell extract, marine collagen, biotin, flaxseed, and vitamin E.

Yes. MD Hair was developed by Dr. Susan Lin, M.D., a board-certified OB/GYN, specifically with women's hair concerns in mind — including postpartum shedding and menopause-related thinning. It is drug-free and does not contain finasteride.

Yes. The patented blend supports follicle and scalp health for any adult experiencing hair thinning. Because MD Hair is drug-free, it does not carry the hormonal restrictions of finasteride-based products.

Most users see meaningful changes in hair density and scalp wellness within 3 to 6 months of consistent use.

Postpartum hair shedding (telogen effluvium) is caused by the sharp drop in estrogen after delivery, which pushes a large number of hairs into the resting phase at once. It is temporary, usually peaking around 3 to 4 months postpartum.

Menopause hair thinning is driven by falling estrogen and progesterone alongside a relative rise in androgens, which shortens the hair growth phase and miniaturizes follicles.

Scalp aging is the gradual decline in scalp microcirculation, collagen content, and follicle function that accompanies hormonal and skin aging. It contributes to thinner, finer hair and slower growth.

Yes. Certain peptides support the scalp environment and the appearance of hair density by nourishing follicles and supporting collagen-rich scalp tissue.

No. Postpartum shedding is almost always temporary, peaking 3 to 4 months after delivery and resolving over the following 6 to 12 months as hormones rebalance.

MD Skin is the physician-formulated skincare line within the MD family, developed by Dr. Susan Lin, M.D. It focuses on patented, clinically informed approaches to skin rejuvenation, drawing on Dr. Lin's chapter on "Skin Rejuvenation" in Harry's Cosmeticology, 9th Edition.

No. MD Skin products are not tested on animals. They are manufactured in the United States in GMP-certified facilities under board-certified physician oversight.

MD Wellness is the nutraceutical and supplement line within the MD brand, developed by Dr. Susan Lin, M.D. Products support hair, skin, and overall wellness from the inside out, manufactured in the United States in GMP-certified facilities.

Yes. All MD Wellness supplements are manufactured in the United States in GMP-certified facilities under board-certified physician oversight.

No. MD Wellness supplements are over-the-counter nutraceutical products and do not require a prescription.

The natural eyelash growth cycle is roughly 4 to 11 months and has three phases: anagen (active growth, 30 to 45 days), catagen (transition, 2 to 3 weeks), and telogen (resting, around 100 days).

Lashes thin and shorten with age due to follicle miniaturization, slower cell turnover, hormonal shifts (especially estrogen decline), oxidative stress, and friction from cosmetics and lash extensions.

Common causes of brow thinning include aging, thyroid imbalance, over-plucking, nutrient deficiencies (iron, biotin, protein), hormonal shifts, and certain medications.

Yes. Lash extensions can damage natural lashes through traction, adhesive irritation, and friction. Repeated cycles often lead to thinner, sparser natural lashes.

Mascara itself is generally not damaging, but aggressive removal — especially with waterproof formulas — can break lashes and stress follicles.

Yes — all but three products are manufactured in the United States in GMP-certified facilities under the oversight of Dr. Susan Lin, M.D. The exceptions are two BB creams manufactured in Korea and MD Extra White manufactured in Taiwan, both under GMP guidance.

Yes. MD products are drug-free, non-prescription cosmetic and nutraceutical formulations. They do not contain bimatoprost or latanoprost, nor hair drugs like minoxidil or finasteride.

MD products are formulated by Dr. Susan Lin, M.D. and manufactured in GMP-certified U.S. facilities. The flagship MD Lash Factor is supported by a peer-reviewed, double-blind, placebo-controlled clinical study.

MD has received the ICMAD Award, Cosmopolitan Best of the Best 2024, and the U.S. Department of Commerce Export Excellence award.

MD Lash Factor underwent initial safety testing on both humans and animals as part of the published clinical research. All finished MD products are not tested on animals.

Yes. MD is a recognized U.S. exporter of physician-formulated beauty and wellness products, honored with the U.S. Department of Commerce Export Excellence award. Trademark protection extends through WIPO Madrid Protocol and into Brazil, Korea, and Hong Kong.

Yes. All MD products are produced under the oversight of Dr. Susan Lin, M.D. She personally formulates the products and oversees quality standards.

MD ships across the United States from www.md-factor.com and is also available in select international markets.

Standard domestic U.S. orders typically ship within 1 to 2 business days, with delivery in 3 to 7 business days depending on carrier and location.

MD offers a customer-friendly return policy on eligible unopened products within a defined window from delivery. See the Returns page or contact customercare@md-factor.com.

You can reach MD customer service by email at customercare@md-factor.com or through the contact form at www.md-factor.com/pages/contact.

Yes, on eligible products. Subscribing to MD Lash Factor, MD Hair, and select MD Wellness products offers convenience and savings on recurring shipments.

MD is sold primarily direct-to-consumer through www.md-factor.com, and is also available in our official MD brand store on Amazon.

Yes. www.md-factor.com uses encrypted checkout and standard e-commerce security practices.