Selenium can be toxic to animals, causing serious health issues, especially in horses.
13 citations,
January 2012 in “International Journal of Trichology” Eating too many paradise nuts for cancer prevention caused a woman to lose all her hair due to selenium poisoning.
78 citations,
December 2011 in “Clinical toxicology” Excessive selenium from a supplement caused toxicity but patients recovered with care.
12 citations,
June 2023 in “Journal of trace elements in medicine and biology” Eating too much selenium can cause bad breath, hair loss, and nail changes, with harmful effects starting at low daily doses.
1 citations,
December 2019 Selenium is essential for health, but too much or too little can cause problems; blood selenium levels are a good measure of intake.
30 citations,
January 2023 in “EFSA journal” Adults should not consume more than 255 micrograms of selenium per day to avoid risk of hair loss and other 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.
134 citations,
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.
The conclusion is that hair supplement ingredients may be unsafe and should be disclosed and proven safe before use.
26 citations,
January 2018 in “Skin appendage disorders” Thallium, mercury, selenium, and colchicine strongly cause hair loss.
18 citations,
May 2016 in “Annals of Medicine” The article concludes that correctly diagnosing systemic causes of hair loss requires a detailed clinical evaluation and a systematic diagnostic approach.
July 2024 in “Annals of Phytomedicine An International Journal” Herbal ingredients like aloe vera and hibiscus can help with hair problems like hair loss and dandruff.
2 citations,
January 2023 in “Pharmaceuticals” Natural products and phytochemicals may help with hair regrowth, but more research is needed.
December 2022 in “Journal of Education, Health and Sport” COVID-19 can cause hair loss, often treated effectively with a combination of supplements and topical treatments.
36 citations,
January 2010 in “Human & experimental toxicology” Eating paradise nuts led to selenium poisoning, causing nausea, hair loss, and other symptoms in two women.
September 2023 in “Food and chemical toxicology” High doses of some selenium supplements caused liver and reproductive harm in rats.
1 citations,
January 2018 in “Molecular and integrative toxicology” Getting the right amount of selenium is important for health; too little can cause disease, and too much can lead to toxicity.
79 citations,
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.
April 2024 in “Skin appendage disorders” Environmental pollutants can damage hair health and cause hair loss.
3 citations,
June 2004 in “Alternative and Complementary Therapies” The document concludes that hair loss is influenced by genetics and other factors, and while treatments like finasteride can help, they have limitations and side effects.
10 citations,
April 2019 in “Environmental Science and Pollution Research” Eating selenium-rich rice improved antioxidant activity and signs of aging in mice.
127 citations,
March 2004 in “Gynecologic oncology” Taking selenium supplements during chemotherapy may help reduce side effects and improve health markers in ovarian cancer patients.
67 citations,
April 2007 in “Journal der Deutschen Dermatologischen Gesellschaft” Shampoos are designed to clean and improve hair and scalp health, with specific ingredients for different hair types and conditions.
13 citations,
January 2015 in “International Journal of Trichology” Higher lead and cadmium, and lower zinc and iron levels in the blood might be linked to chronic hair loss in women.
70 citations,
June 2010 in “Clinics in Dermatology” Certain groups may need vitamin supplements to improve hair health and prevent other health problems.
Some supplements may help reduce side effects of cancer treatments in pets.
66 citations,
November 1997 in “Nutrition” One-third of patients on home nutrition had micronutrient deficiencies, with iron deficiency being most common, but serious issues were rare.
April 2022 in “Anti-cancer agents in medicinal chemistry” Some existing medicines show promise as safe treatments to protect against the side effects of radiation therapy.
16 citations,
May 2019 in “Hormone and Metabolic Research” Selenium might help with insulin resistance and cholesterol in PCOS, but more research is needed to confirm its benefits.
6 citations,
March 2011 in “Experimental Dermatology” Too much or too little selenium in the diet can cause hair loss and graying in mice.