ghk-cu effects on insulin Peptide GHK-Cu vs NAD+: Which Longevity
Description
PMID: 184 ReddiSSenyshynLEbadiMPodlesnyDMinotSSGooleyTet al

Meat, fish, eggs, and dairy products are rich sources

Paracellular and transcellular pathways facilitate insulin permeability in rat gut

Low levels of vitamin B12 can lead to fatigue and anemia in milder cases

Such local side effects are usually transient and self-limited
