Hi, Can you use Super GHK Cream and Retin A at the same time of day? Thank you

See: https://healthyskin.infopop.cc/...361060006#4361060006 for answers...

I have to question why you cannot use GHK at the same time of day as Retin A. From my knowledge, it seems that GHK breaks down from exposure to the low pH of acids, like those found in alpha-hydroxy, beta-hydroxy, and vitamin C serums. Those products typically have a pH in the 2.0-3.5 range.

But, many tretinoin creams typically do NOT have a low pH, with their pH's being closer to the neutral range of around 7.0. RetinA Micro and Tazorac are two that I know of that have a relatively high pH.

Is the pH the reason the advice is always given to not use an acid at the same time of day as GHK?