How to slow down or prevent tranexamic acid color change (yellow/brown)?
I have two tranexamic acid(TA) serums (3% TA), one from Paula’s Choice and the other from Regimen Lab. They have both yellowed/browned. I have read on this forum that TA oxidizes easily because of its amine group and I think it is responsible for the color change in both products.
I want to make my own TA serum, so is there a way to avoid this? (Like by adding antioxidants or chelators such as EDTA/Lactobionic Acid? Does ph impact stability of TA?)
Any advice about formulating with tranexamic acid would be much appreciated! Thank you