June 1937 in “Science news-letter/Science news letter” Vitamin B can prevent hair from turning gray in rats.
3 citations
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August 2020 in “Nutrition Journal” Spinach-derived thylakoid supplements plus a low-calorie diet helped obese women with polycystic ovary syndrome lose weight and improve their metabolism.
109 citations
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October 2007 in “American Journal of Human Genetics” Giving a special protein to dogs with a certain genetic disease improved their symptoms but didn't help with hair growth.
43 citations
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October 1955 in “The journal of nutrition/The Journal of nutrition” Germ-free rats need biotin for growth and have different vitamin metabolism compared to regular rats.
29 citations
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March 2011 in “The Journal of Nutritional Biochemistry” Eating isoflavone can help mice grow hair by increasing a growth factor.