PubMed record Khavinson VK, et al
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For those under severe chronic stress, or who are engaged in strenuous work/athletic training that promotes intense sweating even higher levels might be required, up to 10 milligrams per kilogram of body weight, or 4.5 milligrams per pound." For a 165-pound athlete, that translates into a daily total of approximately 446 mg to 743 mg of magnesium
[3] Examples of stimulants are: amphetamine (Adderall), caffeine (guarana), cocaine, ephedrine, fenfluramine (Fen), methamphetamine, methylphenidate (Ritalin), phentermine (Phen), synephrine (bitter orange)