hello
1. Can I buy Protec™ OX and Protec™ UV to add to vitamin C for Vitamin CE Ferulic form? Will it affect the formula? Because I have bought both vitamin C and have used it. Oxidize the yellow face.
2. Is Vitamin CE Ferulic still available? I can't find it
3. If it's a stabilized vitamin c , can I buy Protec™ OX and Protec™ UV to add?
thank you