Direct research vendors like Koi, Limitless Life Nootropics, and Swiss Chems are easy for an individual to order from, and the good ones publish batch COAs or independent test results
Chronic GI conditions often require 4-12 weeks of consistent oral use
Anti-inflammatory research: GHK-Cu suppresses pro-inflammatory cytokines including TNF-, IL-6, and TGF-, making it directly relevant to inflammation and skin barrier dysfunction studies
You don't need to wait until completely dry, just until the wet, slippery feel has transitioned to tacky or mostly absorbed
Here's how to give yourself a b12 injection
Without enough B12, you may experience fatigue, brain fog, low mood, or even anemia