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Glutathione supplements are generally safe with mild gastrointestinal side effects

10.1016/j.bbagen.2013.04.006 Biochim

Protease activity The quantitative extracellular protease activity in the solution was investigated in Renuspore by employing a commercial EnzChek Protease Assay Kit (Molecular Probes, Eugene, OR, USA), which contains a casein derivative labeled with green-fluorescent BODIPY FL dye

The peptide's four-residue structure makes it one of the smallest bioactive peptides studied in longevity research, and its compact size contributes to favorable pharmacokinetic properties including rapid absorption from subcutaneous injection sites