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According to the brand's published documentation, the arginate salt offers greater stability in the gastrointestinal environment compared to acetate, and this was the deliberate formulation choice made to support consistency and potency in capsule delivery.* That rationale is stated by the brand and reflected on the product page

OPSS addresses this concern directly, warning supplement contamination can contribute to adverse health events and potential drug-testing consequences

[73] [74] [75] It is synthesized by some bacteria in the gut microbiota in humans and other animals, but it has long been thought that humans cannot absorb this as it is made in the colon, downstream from the small intestine, where the absorption of most nutrients occurs

RRID:Addgene_112864), was modified by incorporation of peptide TGCDCRGDCFCG between amino acid 584 and 585 of VP1