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Research published in the Journal of Pharmaceutical Sciences demonstrates that peptide degradation follows first-order kinetics, with reaction rates doubling for every 10C increase in temperature
A peptide is a chain of amino acids held together by peptide bonds, and those bonds are precisely what digestive enzymes (pepsin, trypsin) are built to cut, with the acidic stomach environment finishing the job so an oral peptide is largely destroyed before it can be absorbed, which is why injection is the default
Glutathione injection helps lighten skin by reducing melanin production, and it also supports detoxification, immune function, and anti-aging efforts
Taking an oral capsule with food may be easier on the stomach, but food could also change absorption
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