One study found men who took 600 milligrams (mg) of ashwagandha a day and participated in an ... Examples of supplements with this same side effect include hops, kava, L-tryptophan, and valerian. You ...
dihydrochloride (AAPH), trifluoroacetic acid (TFA), and l-tryptophan (Trp) were purchased from Sigma Chemical Co. Aldrich Canada Ltd (Oakville, Ontario). Methanol and acetonitrile HPLC grade and ...