18 citations
,
October 2014 in “Experimental Biology and Medicine” Eating vitamin A affects hair growth and health by changing cell signals in mice.
September 2022 in “Zenodo (CERN European Organization for Nuclear Research)” 2 citations
,
November 1961 in “American Journal of Clinical Nutrition”
16 citations
,
January 2008 in “Acta dermato-venereologica” Vitamin B12 deficiency can cause skin darkening and increased blood vessels, but treatment can improve symptoms.
1 citations
,
August 2021 Instagram ads for skin, hair, and nail supplements often make broad health claims without clear ingredient information, and are not FDA-regulated.
February 2025 in “Animals” Amino acid-complexed trace minerals improve hair quality and activity in senior dogs.
15 citations
,
May 2011 in “Veterinary Dermatology” Vitamin A might be a safe extra treatment for dogs with sebaceous adenitis, but more research is needed to prove its effectiveness.
May 2011 in “Utrecht University Repository (Utrecht University)” The nicotinamide supplement did not reduce symptoms in horses with insect bite hypersensitivity.
June 2012 in “한국생활과학회지 = Korean journal of human ecology” The supplement reduced hair loss and increased hair thickness without side effects.
1 citations
,
July 2023 in “Plastic and Aesthetic Nursing” Biotin and collagen may improve hair health.
134 citations
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December 2018 in “Dermatology and Therapy” Some vitamins and minerals like vitamin D and iron can help with certain types of hair loss, but more research is needed for others.
February 2024 in “Cosmoderma” Micronutrient supplements for hair loss may not help and could be harmful without proven deficiencies.
January 2025 in “Journal of Cosmetic Dermatology” The supplement improved hair growth and quality in men with thinning hair and was safe to use.
August 2022 in “Indonesian Journal of Medical Chemistry and Bioinformatics” Certain herbal compounds might help prevent hair loss in menopausal women by activating Vitamin D receptors.
January 1993 in “Inpharma Weekly” A new food supplement was highly effective in curing hair loss in young men.
57 citations
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February 2018 in “Journal of the American Academy of Dermatology” Biotin supplements are not proven to improve hair or nails and may interfere with medical tests.
February 2025 in “Pharmaceuticals” Myo-inositol with magnesium effectively reduces acne and hirsutism in PCOS patients without side effects.
February 1994 in “Neuroscience letters” People need different amounts of biotin based on age and it's important for health, with many foods providing enough.
June 2024 in “British Journal of Dermatology” Vitamin B supplements may reverse grey hair.
Some supplements may help reduce side effects of cancer treatments in pets.
November 2022 in “Journal of the Endocrine Society” Taking biotin can lead to incorrect low results in free testosterone tests.
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.
September 2022 in “Journal of the American Academy of Dermatology” Taking specific vitamins and minerals did not significantly improve hair growth in people with hair loss.
1 citations
,
May 2023 in “Elsevier eBooks” September 2025 in “Cosmetics” NMN supplements may improve hair quality and appearance in middle-aged women.
September 2024 in “Journal of Family Medicine and Primary Care” Primary health physicians in Saudi Arabia need better guidelines for treating hair loss with vitamins and minerals.
Vitamin D is crucial for skin health and managing skin diseases.
5 citations
,
March 2012 in “Journal of Investigative Dermatology” Vitamin D receptor and mediator 1 are crucial for healthy skin and hair growth.
12 citations
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September 1997 in “PubMed” Vitamin D could be important for many skin functions and synthetic versions may treat various skin diseases.