August 2023 in “International journal of research in medical sciences” The serum is safe and helps treat premature greying of hair.
49 citations,
July 2004 in “Anesthesiology” The document concludes that more research is needed to understand how to treat muscle pain with drugs.
20 citations,
February 1991 in “Archives of dermatology” High doses of tryptophan may cause eosinophilic fasciitis.