ghk-cu peptide nebenwirkungen Peptide: What It Does for Body Composition and Metabolic Health Kupferpeptide (GHK-Cu): Anwendung, Wirkung &

With an innate inability to activate collateral pathways, direct vessel occlusion (the inferior caval vein syndrome [11], Pringle maneuver ischemia, reperfusion syndrome [12], Budd-Chiari syndrome [13], superior sagittal sinus occlusion syndrome [20], occluded superior mesenteric artery syndrome [15], occluded superior mesenteric vein syndrome [14], occluded superior mesenteric artery and vein syndrome [16], and episcleral veins cauterization-glaucoma syndrome [19]) was encountered

So you need not be worried about drinking treated pool water

Nat Cell Biol 19 , 589591 (2017)

However, as genotyping is not currently routinely available and serum vitamin B 12 measurement is cheap, our results reinforce the causal association of metformin treatment with vitamin B 12 deficiency and guideline recommendations for routine screening for vitamin B 12 deficiency in people treated with metformin