Please allow me to ask if using serum
perfect c or
Natural-C Glycol ™ can be used with shampoos or soaps containing
BioSulphur™ or sulfur in range Is it close to the same time? because usually use shampoo with
Sulphur 2-weeks 3 times (due to oily scalp) and then use serum
perfect c every day or some days will use
Natural-C Glycol ™ Seen in the information suggesting that they should not be used together. I don't know how to use it in such close time that it will cause
vit c or does sulfur deteriorate? Thank you in advance for your answer.