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November 2021 in “British Journal of Clinical Pharmacology” Saw palmetto may cause erectile dysfunction and needs better safety monitoring.
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July 1980 in “British Journal of Dermatology” Topical putrescine and spermine increased DNA synthesis in hairless mouse skin.
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July 1984 in “Journal of Animal Science” Adding biotin to sows' diets increased the number of pigs weaned per litter.
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November 2022 in “Molecules/Molecules online/Molecules annual” Some calcium supplements have more calcium than their labels say, and a few have less.
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April 2016 in “Más dermatología” The supplement with Serenoa repens and Pygeum africanum significantly increased active hair growth and decreased rest phase hair in post-menopausal women with hair loss, with only mild digestive side effects.
April 2026 in “International Journal of Advanced Biochemistry Research” Aegle marmelos fruit extract can protect against arsenic toxicity in mice.
January 2025 in “MEDS Public Health and Preventive Medicine” Spermidine supplements can help extend the hair growth phase and may be useful for treating hair loss.
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January 1982 in “Acta agriculturae Scandinavica” Mink use L-methionine and L-cystine slightly better than natural amino acids for hair growth, but D-methionine is not effective.
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January 2012 in “Journal of nutrition & food sciences” The supplement improved hair, skin, and nails appearance and had long-term benefits.
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May 2025 in “Analytical Science Advances” A new method accurately measures iron in small samples with high sensitivity and low cost.
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March 2007 in “Journal of dermatological science” Taking L-cystine and vitamin B6 can prevent hair loss caused by smoke in mice.
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December 1992 in “The journal of pediatrics/The Journal of pediatrics” Zinc supplements improved hair and skin conditions in two patients.
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April 2023 in “Pharmacognosy Magazine” Cerasus serrulata flower extracts can help turn grey hair black again.
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January 2006 in “Cutaneous and ocular toxicology” L-cystine, D-pantothenat, and miliacin together significantly boost keratinocyte growth and metabolism.
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October 2023 in “Life science alliance” Pantethine may boost the immune system's ability to fight sarcoma.
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February 1999 in “Biochemical Journal” Overexpression of SSAT in mice causes hair loss, liver damage, and sensitivity to polyamine analogues.
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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.
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December 2011 in “EFSA Journal” Spermidine may help extend the growth phase of hair.
February 2026 in “Animals” Methionine supplementation in low-protein diets improves growth, fur quality, and gut health in blue foxes.
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June 2011 in “EFSA Journal” Spermidine's effect on hair growth is not proven.
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March 2023 in “Frontiers in Nutrition” Hair analysis can detect small changes in dietary zinc intake.
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July 2021 in “Uro” Saw palmetto extract is generally safe and can effectively treat Lower Urinary Tract Symptoms, but its evaluation is affected by varying quality and a need for long-term studies.
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October 2007 in “Proceedings of the National Academy of Sciences of the United States of America” Sulforaphane from broccoli can help protect skin from sun damage.