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Definition Page for DrumLib's Health Research Review:
Tyrosine (TIE-roe-seen)
An essential amino acid that is
the precursor for catecholamines
and thyroid hormone. People who take ECA especially need this supplement because, unfortunately, caffeine can lower tyrosine levels. This is an extremely
important supplement for obese people who should take it on an empty stomach since a
number of amino acids compete with tyrosine for entry into the brain.
Tyrosine can give some people a headache. If tyrosine is not well
tolerated, most (maybe all) of the benefits of tyrosine supplementation can be obtained by
taking the amino acid phenylalanine.