does ghk-cu lose effectiveness over time topical for Skin: What the Evidence Shows GHK-Cu Peptides Benefits for Anti-Aging
Description
Nature 416: 535539 [DOI] [PubMed] [Google Scholar] Wang XB, Yang Y, Zhou Q 2007
x30 Exel U-100 Insulin Syringes (your choice of gauge and length)
Science 339:708711
clinical data is thin
They work by spraying a liquid B12 into your nose, which then goes into your bloodstream
The frequency depends on individual needs, deficiency levels, and medical advice
