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What is biotin and low level laser therapy (LLLT), and how can it help thinning hair?

ANSWER

Biotin is a B vitamin that's essential for your health. No scientific studies have shown biotin prevent or treats hair loss. Low level laser therapy is the theory is that when hair follicles absorb laser light at a certain level, it stimulates hair growth. But there’s not enough evidence that any of these devices restore hair or prevent balding.

SOURCES:

American Academy of Dermatology: "Hair Loss: Diagnosis, treatment and outcome," "Hair loss: Who gets and causes."

Avram, M. Journal of Cosmetic and Laser Therapy, March 2007.

FDA: "Questions and Answers: Finasteride Label Changes."

International Society of Hair Restoration Surgery: "Low Level Laser Therapy."

Linus Pauling Institute: "Biotin."

MedLine Plus: "Minoxidil Topical."

Messenger, A. British Journal of Dermatology, 2004.

Adam Penstein, MD, chief of dermatology, North Shore-LIJ Health System, Lake Success, NY.

Trueb, R. Journal of Clinical Interventions in Aging, June 2006.

Reviewed by Debra Jaliman on September 5, 2019

SOURCES:

American Academy of Dermatology: "Hair Loss: Diagnosis, treatment and outcome," "Hair loss: Who gets and causes."

Avram, M. Journal of Cosmetic and Laser Therapy, March 2007.

FDA: "Questions and Answers: Finasteride Label Changes."

International Society of Hair Restoration Surgery: "Low Level Laser Therapy."

Linus Pauling Institute: "Biotin."

MedLine Plus: "Minoxidil Topical."

Messenger, A. British Journal of Dermatology, 2004.

Adam Penstein, MD, chief of dermatology, North Shore-LIJ Health System, Lake Success, NY.

Trueb, R. Journal of Clinical Interventions in Aging, June 2006.

Reviewed by Debra Jaliman on September 5, 2019

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