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It is responsible for metabolism, alertness and focus When amino acids are deficient, your neurotransmitters can get out of balance, wreaking havoc with your physical and mental health

That makes them adjuncts, not replacements
Mass spec shows whether it is the right compound

Although some studies show that it does help improve performance during short periods of athletic activity, there is no evidence that creatine helps with endurance sports like running longer distances

Vigorous Shaking: Weve mentioned it before, but it bears repeating
It is widely used as a research probe for adipose-tissue lipolysis and metabolic regulation