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