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.
October 2022 in “Research, Society and Development” Vitamins and minerals don't significantly affect hair loss treatment in patients with telogen effluvium.
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.
March 2013 in “International Society of Hair Restoration Surgery” Biotin may not effectively promote hair growth.
The conclusion is that hair supplement ingredients may be unsafe and should be disclosed and proven safe before use.
65 citations
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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.
10 citations
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July 2018 in “Our Dermatology Online” Some vitamins and minerals are important for preventing hair loss, but treating hair loss with them without a known deficiency is not proven effective.
1 citations
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January 2010 in “Springer eBooks” Certain micronutrients may improve hair and nail health, but more research is needed to confirm their benefits.
9 citations
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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.
2 citations
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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.
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.
7 citations
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October 2020 in “Dermatology practical & conceptual” Some skin, hair, and nail supplements can be toxic, interact with medications, affect lab tests, and may increase cancer risk.
July 2025 in “Cosmoderma” The plant-based supplement improved hair, skin, and nail health and boosted well-being without side effects.
December 2010 in “Bariatric Nursing and Surgical Patient Care” Hair loss after bariatric surgery can be reduced by staying hydrated, eating enough protein, taking vitamins, managing stress, and possibly using biotin.
79 citations
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January 2017 in “Dermatology practical & conceptual” Correcting nutrient deficiencies may help with hair loss, but the benefits of supplements without a deficiency are uncertain and could be harmful.
7 citations
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January 2010 in “Animal” Angora goat hair grows faster and produces more protein than cashmere goat hair, and certain hormones and nutrients positively affect hair growth and protein synthesis.
1 citations
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June 2017 in “Journal of The American Academy of Dermatology” PRP treatment for hair loss shows promise, with 58% of patients satisfied and most noticing improvement within 6 months.
July 2018 in “International journal of clinical & experimental dermatology” Eat a balanced diet for healthy hair; only use supplements if you have a proven nutrient deficiency.
40 citations
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August 2018 in “Skin appendage disorders” Some alternative treatments for hair loss might work, but more research is needed.
19 citations
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November 1937 in “Experimental biology and medicine” Nutritional deficiencies in rats cause skin problems that can be treated with the right vitamins.
14 citations
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April 2000 in “Animal Science/Animal science” Nutrients like vitamins, copper, zinc, and amino acids are crucial for healthy hair and wool growth.