January 2022 in “Bio web of conferences/BIO web of conferences” The conclusion is that normal trace element levels in newborn calves' hair are between the 25th and 75th percentiles, and levels outside this may indicate diselementosis.
February 2019 in “Americanae (AECID Library)” Selenium and zinc deficiency in sheep leads to thyroid and skin problems.
Some supplements may help reduce side effects of cancer treatments in pets.
February 2024 in “Research Square (Research Square)” People today have lower levels of arsenic, lead, cadmium, and iron in their hair than people did 100 years ago.
48 citations
,
March 2003 in “BJOG: An International Journal of Obstetrics and Gynaecology” Mothers and newborns with dental fillings had higher mercury in their hair, but getting fillings during pregnancy didn't raise mercury levels further.
March 2003 in “BJOG: An International Journal of Obstetrics and Gynaecology” Mothers and newborns with dental fillings have higher mercury in their hair, but adding fillings during pregnancy doesn't raise mercury levels further.
6 citations
,
March 2011 in “Experimental Dermatology” Too much or too little selenium in the diet can cause hair loss and graying in mice.
15 citations
,
March 1997 in “International Journal of Dermatology” Selenium sulfide in anti-dandruff shampoos can turn hair green.
15 citations
,
July 2012 in “Biological trace element research” Higher hair calcium to magnesium ratios and lower chromium levels in hair may indicate insulin resistance in Korean men.
July 2025 in “International Journal of Pharmaceutical Sciences Review and Research” Balanced selenium intake from wheat is crucial for preventing hair loss.
7 citations
,
January 1995 in “Journal American Society of Mining and Reclamation” Excess selenium and sulfur in plants can harm animals, causing symptoms like hair loss and poor reproduction.
1 citations
,
February 2021 in “Animal feed science and technology” Organic selenium may offer better retention and less waste in puppies.
June 2021 in “Current Biochemistry” Stingless bee propolis at a 6.25% concentration effectively stops dandruff-causing bacteria growth, performing better than ketoconazole.
Selenium can be toxic to animals, causing serious health issues, especially in horses.
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.
February 2024 in “Animals” Giving selenium yeast to pregnant goats leads to better hair growth and cashmere quality in their babies.
15 citations
,
January 2016 in “Przeglad Menopauzalny” Eating a balanced diet with specific nutrients is important for menopausal women to manage hair loss.
February 2021 in “Austin journal of nutrition & metabolism” Appropriate zinc levels may help prevent hair loss in university students.
4 citations
,
July 2012 in “Dermatologic Clinics” New biopsy techniques and tools improve alopecia diagnosis, and both too much and too little selenium can cause hair loss.
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.
5 citations
,
May 1983 in “Australian journal of biological sciences” Certain amino acid analogues can inhibit wool and hair growth and affect fiber strength.
27 citations
,
September 2017 in “Journal of Medicinal Food” Annurca apple supplement safely increases hair growth and keratin in humans.
March 2014 in “CRC Press eBooks” Some nutrients and antioxidants may improve skin and hair health, but more research is needed to confirm these benefits.
22 citations
,
August 2019 in “Environmental research” Pseudomonas sp. T5-6-I bacteria increase selenium uptake in Brassica oleracea plants by 130%.
February 2024 in “Journal of Geochemical Exploration” Selenium levels in soil, crops, and human hair in Northwest China are within safe limits.
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.
January 2026 in “Journal of Trace Elements in Medicine and Biology” Dogs have more iron and copper in their hair than cats, and outdoor animals have higher iron levels.
7 citations
,
January 2002 in “Biological Trace Element Research” Children with pituitary dwarfism have higher zinc and copper, lower manganese, and similar iron levels in hair compared to normal children.
December 2025 in “SHILAP Revista de lepidopterología” Correcting selenium and zinc levels may help manage hair loss in autoimmune thyroiditis.
Adding zinc to papaya extract speeds up wound healing.