July 2005 in “HortScience” This study found that adding sheep wool-waste or human hair-waste to soil increased yields and secondary metabolites in various crops and supported up to five harvests without additional fertilizers, though it decreased mycorrhizae colonization.
38 citations
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May 2000 in “Livestock production science” This study found that good quality protein supplements or rumen-protected methionine increased fiber yield in Angora goats and, to a lesser extent, in Cashmere goats.
35 citations
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April 2014 in “Journal of proteomics” In this study, experimentally induced weight loss in merino sheep led to a decrease in wool fiber diameter and increased expression of certain high sulfur and glycine-tyrosine proteins, potentially impacting wool quality and industry preferences.
7 citations
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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.
1 citations
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February 2021 in “Animal feed science and technology” This study found that puppies fed organic selenium had better retention of selenium compared to those fed inorganic selenium, with no significant difference in coat quality or hair growth.