May 2021 in “Research journal of topical and cosmetic sciences” TrichovitalsTM improved skin, hair, and nail health in adults after 12 weeks.
11 citations
,
September 2007 in “Advances in therapy” INVERSION Femme supplement helped women lose weight, reduce hair loss, and improve skin and nail health.
1 citations
,
August 2023 in “Journal of cosmetic dermatology (Print)” Too much selenium can cause hair loss and nail problems.
1 citations
,
May 2021 in “Research journal of topical and cosmetic sciences” Muttaijow ComplexTM improved skin, hair, and nail health in middle-aged adults.
5 citations
,
January 2012 in “Journal of nutrition & food sciences” The supplement improved hair, skin, and nails appearance and had long-term benefits.
June 2021 in “Current developments in nutrition” The LustrivaTM BH-002 supplement and hair serum improved women's hair, skin, and nail health and appearance.
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.
July 2025 in “Cosmoderma” The plant-based supplement improved hair, skin, and nail health and boosted well-being without side effects.
7 citations
,
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.
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.
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.
3 citations
,
February 2020 in “International journal of women’s dermatology” Most women with hair loss take more supplements than average, but these often don't help and can be risky and costly.
11 citations
,
January 2014 in “The Scientific World Journal” Cynatine HNS improves hair and nail quality in 90 days.
1 citations
,
April 2016 in “Journal of Investigative Dermatology” Patients with Focal Dermal Hypoplasia often experience skin, nail, hair, and bone issues, and may benefit from calcium and vitamin D supplements.
Fad diets and supplements from social media can cause skin and hair problems.
27 citations
,
June 2010 in “Journal of the American Academy of Dermatology” Excessive selenium in supplements can cause hair loss and nail issues.
13 citations
,
January 2019 in “Journal of the American Academy of Dermatology” Most people using biotin don't see skin improvements, and it may affect lab tests, so doctors shouldn't suggest it without confirming a deficiency.
1 citations
,
February 2022 in “Journal of the American Academy of Dermatology” Taking biotin supplements can be risky and often lacks evidence of effectiveness for skin, hair, and nail issues.
79 citations
,
April 1996 in “JAMA” Taking too many selenium supplements can cause serious health problems like hair loss and fatigue.
78 citations
,
January 2017 in “Skin appendage disorders” Biotin supplements may improve hair and nail growth in people with certain deficiencies or conditions, but there's not enough evidence to recommend it for healthy individuals.
2 citations
,
June 2023 in “Journal of clinical medicine” Soy supplements improve various skin conditions and aging signs, with topical use boosting skin barrier function.
Iron supplements may reverse premature graying in iron-deficient individuals; ingrown nails are common in diabetics with certain risk factors; topical finasteride may reduce scalp DHT as effectively as oral finasteride; monilethrix treatment is challenging but some medications can help.
April 2024 in “Journal of the American Academy of Dermatology” Taking biotin supplements for hair and nails may not be helpful and could cause harm.
57 citations
,
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.
April 2024 in “Current research in nutrition and food science” Taking an amino acid supplement improved skin, hair, and nail health in women.
December 2025 in “International Journal of Clinical Medical Research” Diet and gut health can improve skin, hair, and nails.
2 citations
,
May 2018 in “PubMed” Pregnant women with isolated hypothyroxinemia face more health issues, so iodine and folic acid supplements are important before and during early pregnancy.
53 citations
,
October 1978 in “Archives of dermatology” Zinc supplements can resolve skin issues caused by zinc deficiency.
1 citations
,
June 2018 in “Ukrainian Journal of Dermatology Venerology Cosmetology” Oral collagen improves skin, nails, hair, and reduces cellulite.
July 2020 in “Farmacja Polska” People need more education on the safe and proper use of dietary supplements.