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[ 1 , 2 ] The peptide consisted of nine amino acids and was named delta sleep-inducing peptide because of its apparent ability to enhance delta-wave activity, a characteristic feature of deep non-rapid eye movement (NREM) sleep

Others note that because research shows that collagen supplementation may help people with joint pain become more mobile and thus exercise more it could be a useful component of a weight loss plan

Possibilities include: fecal SCFA levels (as an indicator of beneficial fermentation), serum TMAO (marker of detrimental microbial metabolism), gut permeability assays (like urinary sugar tests or blood zonulin) to gauge gut barrier integrity, and even gut microbial gene profiles that might predict rapid vs slow disease progression

Another consideration is their shelf life after opening