miameow said:
These ingredients have been popular in DIY skincare communities for a very long time, so I would look at established cosmetic ingredient resellers rather than grey-market peptide sources.
A lot of reputable cosmetic raw material suppliers/resellers provide the exact INCI name, concentration, solvent/base, usage range, and up-to-date spec sheets.
The only tricky part is that these are often sold under various trade names, so you’ll usually need to identify the INCI name for each ingredient and then use Google to match it accurately.
For example:
Disclaimer: I have not ordered these specific ingredients myself, but I have purchased other ingredients from this reseller over many years. You’ll still need to test your own formulas to make sure the final product is stable. Otherwise, I’d stick to making small batches and using them up within a week.
Click to expand...