26 citations
,
May 1984 in “Journal of Parenteral and Enteral Nutrition” Biotin supplements restored hair and resolved symptoms in a woman with biotin deficiency.
24 citations
,
May 2017 in “PubMed” Biotin supplements for hair improvement are popular without scientific proof of effectiveness.
6 citations
,
October 1980 in “Archives of Dermatology” Vitamin deficiencies, especially biotin and vitamin D, can cause hair loss.
5 citations
,
March 2021 in “International Journal of Dermatology” Biotin supplementation during isotretinoin treatment for acne may help maintain skin hydration and improve hair growth.
5 citations
,
October 2019 in “Giornale italiano di dermatologia e venereologia” Biotin supplements can improve certain skin disorders and hair loss when a deficiency is present.
1 citations
,
July 2022 in “Dermatologic Therapy” Both brands of biotin and dexpanthenol injections improved hair loss, with Bayer also increasing the ratio of thick to thin hairs.
1 citations
,
July 2012 in “EFSA Journal” The combination of certain vitamins and pumpkin seed oil has not been proven to maintain normal hair.
1 citations
,
November 2011 in “Dermatologica Sinica” Women using hair relaxers with alopecia had lower zinc levels, suggesting zinc deficiency might contribute to hair loss.
1 citations
,
January 1999 in “Proceedings of the British Society of Animal Science” Biotin helps maintain hair follicle growth by affecting cell death and survival signals.
The supplement may reduce hair shedding but needs more research for skin benefits.
September 2024 in “Cosmoderma” Biotin doesn't help hair growth in healthy people and can cause health risks if overused.
Biotin does not significantly help with hair growth.
January 2024 in “Biomedical journal of scientific & technical research” Vitamins A, B7, C, D, and E are essential for healthy hair growth and preventing damage.
Older people tend to have higher biotin levels, which are weakly linked to certain blood components and negatively linked to triglycerides; biotin should be checked in patients with high triglycerides or medication-related skin issues, and only supplemented if deficient. Vitamin D and folate deficiencies are linked to specific skin conditions.
February 2023 in “JEADV Clinical Practice” Biotin supplements significantly improved a young girl's uncombable hair.
November 2022 in “Journal of the Endocrine Society” Taking biotin can lead to incorrect low results in free testosterone tests.
June 2022 in “International Journal of Advanced Research in Science, Communication and Technology” The polyherbal hair oil with Vitamin B7 may increase hair growth, reduce hair loss, and protect against dandruff.
May 2022 in “Endocrine practice” High-dose biotin can cause false thyroid test results; stop taking biotin two days before testing to avoid errors.
August 2021 in “Benha Journal of Applied Sciences” Biotin supplements significantly improve hair loss in people with telegon effluvium who lack biotin.
Taking too much biotin can mess up blood test results, which might lead to wrong diagnoses and treatments.
April 2019 in “Journal of the Endocrine Society” An over-the-counter vitamin/mineral supplement improved hair loss and blood sugar control in a woman with non-classic 11-hydroxylase deficiency.
65 citations
,
October 2018 in “Frontiers in cellular and infection microbiology” Certain bacteria and fungi are linked to healthy scalps and dandruff, suggesting that the scalp's microbial balance affects its health.
9 citations
,
February 1981 in “Australian journal of biological sciences” Lambs fed a liquid diet showed abnormal wool and skin, which improved with more B-vitamins, suggesting a link to B-vitamin deficiency.
The conclusion is that hair supplement ingredients may be unsafe and should be disclosed and proven safe before use.
December 2025 in “International Journal of Innovative Technologies in Social Science” Oral supplements like Vitamin E and Omega-3 can help reduce isotretinoin side effects.
August 2021 in “Indian dermatology online journal” A young boy with a rare skin and nail condition improved significantly with simple topical treatments.
May 2015 in “Cancer research” After chemotherapy for early breast cancer, 33.4% of patients had long-term significant hair loss, with some hair regrowth over time, but treatments for hair loss were largely ineffective.
2 citations
,
June 2023 in “Journal of the American Academy of Dermatology” Hair, skin, and nails supplement use nearly doubled from 2011 to 2020, with higher usage among young adults, females, and certain ethnic groups.
239 citations
,
July 2002 in “Clinical and Experimental Dermatology” Low iron and L-lysine levels can cause hair loss in women, and increasing these nutrients can reduce hair shedding.
72 citations
,
October 1988 in “Archives of Disease in Childhood” Biotin treatment improves symptoms of biotinidase deficiency, but some neurological damage may be permanent.