(Source: PMC6073405 ) 2
If you want to use both, its best to alternate them on different days to avoid over-exfoliation or sensitivity
Glycine and N-acetylcysteine (GlyNAC) supplementation in older adults improves glutathione deficiency, oxidative stress, mitochondrial dysfunction, inflammation, insulin resistance, endothelial dysfunction, genotoxicity, muscle strength, and cognition: Results of a pilot clinical trial
Jusuf is with the Division of Cosmetic Dermatology, Department of Dermatology and Venereology, Faculty of Medicine, Universitas Sumatera Utara-Universitas Sumatera Utara Hospital in Medan, Indonesia
Some studies show that combining vitamin C with microneedling or sonophoresis enhances absorption and improves elasticity in sensitive skin
What a COA Should Include Identity confirmation Mass spectrometry confirming the correct molecular weight (~504 Da for Dihexa) Confirmation that the tested compound matches CAS 1401708-83-5 / PNB-0408 Purity testing HPLC purity reputable listings claim ~98% or higher An HPLC chromatogram showing a single dominant peak, not a cluster of unresolved peaks Contamination testing Residual solvent analysis (especially relevant given DMSO-based transdermal forms) Heavy metals screening where the supplier provides it How to Verify a COA Is Legitimate Match the batch
