vitamin b12 oral vs injection vs. B12 Injections: What Is the Difference? Frontiers | Efficacy of sublingual

While these findings remain encouraging, much of the published evidence has been generated through laboratory and animal models, and additional research is needed to further define its biological effects

The "right" dose sits in a narrow window that depends on: Delivery method - injectable GHK-Cu vs topical GHK-Cu vs oral/sublingual GHK-Cu Goal - skin rejuvenation , hair and scalp support, wound healing , general anti-ageing Individual factors - age , skin type , baseline GHK levels , other peptides being stacked Natural plasma GHK falls from roughly 200 ng/ml at age 20 to around 80 ng/ml by age 60

Current lab values, medication list, kidney function, and hydration status all factor in

The study also recommended that vegans and vegetarians take B12 supplements to make sure that their bodies get enough of this vitamin to support essential bodily functions

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