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UCLA Health notes there isnt robust proof that adding more via supplements provides super-benefits for the average healthy individual (UCLA Health)

Peer review Peer review information Nature Communications thanks Matteo Villa, and the other, anonymous, reviewer(s) for their contribution to the peer review of this work

For example, (1) Glucagon-like peptide 1 (GLP1) is an intestinal hormone that can enhance insulin secretion in a glucose-dependent manner by activating the GLP-1 receptor (GLP-1R) that is highly expressed on islet cells

10.1371/journal.pone.0124265 106 XuanW

By now most of us know someone who has tested positive for COVID-19