By dosage, the mean changes were: 500 mcg: 127% 750 mcg: 176% (single study) 1,000 mcg: 280% 1,500 mcg: 310% 2000 mcg: 260% 5,000 mcg: 62% While 1,500 mcg of vitamin B12 showed the highest average increase, the effect plateaued or declined at higher doses, suggesting a possible saturation of absorption pathways
Collagen and Elastin Synthesis: GHK-Cu and BPC-157 both upregulate collagen and elastin production, improving tissue elasticity, structural strength, and aesthetic recovery following injury or stress 1,3
More practically, if you are taking vitamin C supplements with capsules on an empty stomach, the gastric pH reduction is not the concern (stomach is already acidic)
"Vitamin B-12 and cognition in the elderly"