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Level 1: identification by retention times (compared against in-house authentic standards), accurate mass (with an accepted deviation of 3 ppm), and MS/MS spectra, Level 2a: identification by retention times (compared against in-house authentic standards), accurate mass (with an accepted deviation of 3ppm)
Singh, V
Peptides sprayed into the nose bypass the digestive system entirely, avoiding the enzymatic degradation that destroys oral peptides
Most customers feel completely fine once taken with food
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