May 2022 in “Endocrine practice” High-dose biotin can cause false thyroid test results; stop taking biotin two days before testing to avoid errors.
research Iron
January 2014 in “Reactions Weekly” A woman had nausea and constipation from iron pills taken for hair loss due to low iron.
96 citations
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August 1995 in “Bone” Vitamin D3 is important for bone health and may help treat various diseases beyond bone-related conditions.
1 citations
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August 2017 in “Journal of food and nutrition research” The herbal supplement increased hair thickness and reduced scalp oiliness in women.
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.
77 citations
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August 1986 in “Archives of Dermatology” Vitamin B12 deficiency can cause skin and hair color changes, which are reversible with treatment.
45 citations
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December 2006 in “Baillière's best practice and research in clinical endocrinology and metabolism/Baillière's best practice & research. Clinical endocrinology & metabolism” Vitamin D and its receptor are essential for hair growth, cell regulation, immune function, and heart health.
2 citations
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November 1995 in “American Journal of Obstetrics and Gynecology” Taking vitamin B6 corrected a pregnant woman's metabolic disorder, which changed her hair color.
March 2023 in “Mağallaẗ wāsit li-l-ʿulūm wa-al-ṭibb” A rare biotin deficiency in an Iraqi family caused severe symptoms but was successfully treated with lifelong biotin.
3 citations
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September 2025 in “ChemMedChem” Multitarget drugs are needed to better treat complex diseases.
May 2026 in “Journal of Cosmetic Dermatology” The supplement improved hair growth and reduced hair loss effectively.
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.
November 2024 in “Journal of Medical and Life Science” Vitamin D and Zinc deficiencies can cause various symptoms, but supplements and lifestyle changes can improve them.
May 2023 in “Elsevier eBooks” Some nutritional supplements may help thicken hair in people with hair loss, but taking too much can cause side effects.
4 citations
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March 2023 in “Journal of medical case reports” Taking too much vitamin E caused a young man's blood clotting problems, which improved after he stopped the vitamin E and got treatment.
May 2026 in “Materials Today Bio” The nanocomplex protects hair from UV damage and strengthens it.
1 citations
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January 2013 in “Nasza Dermatologia Online” Vitamin B12 deficiency can cause reversible hair color loss in children.
The vitamin D receptor has many roles in the body beyond managing calcium, affecting the immune system, hair growth, muscles, fat, bone marrow, and cancer cells.
The new delivery system makes retinol and niacinamide more stable and effective for anti-aging and skin-brightening.
2 citations
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June 1972 in “PubMed”
January 2025 in “JAAD International” Bicalutamide added no extra benefit over minoxidil alone for female-pattern hair loss.
Biotin and silica from plants improve hair, skin, and nail health.
August 2021 in “Journal of the American Academy of Dermatology” The shampoo's ingredients' effect on a hair growth pathway in cells was tested, but the results are not given.
March 2013 in “International Society of Hair Restoration Surgery” Biotin may not effectively promote hair growth.
Vitamin D is crucial for skin health and managing skin diseases.
September 2006 in “Baghdad Science Journal” Pregnant and breastfeeding women may experience hair loss if they don't get enough essential vitamins and minerals.
3 citations
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April 2015 in “Cleveland Clinic Journal of Medicine” The woman has scurvy and needs more vitamin C.
1 citations
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September 2007 in “Neuromuscular disorders” The treatment with valproate, acetylcarnitine, folic acid, and vitamin B12 may improve muscle strength in children with SMA without significant side effects.
10 citations
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January 1992 in “Screening” Newborn screening for biotinidase deficiency is effective in preventing severe complications.