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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. , March 2007. Journal of Cosmetic and Laser Therapy

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. , 2004. British Journal of Dermatology

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

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

Reviewed by Debra Jaliman on October 10, 2017

SOURCES:

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

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

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. , 2004. British Journal of Dermatology

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

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

Reviewed by Debra Jaliman on October 10, 2017

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When should you see a doctor about hair loss?

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