Cosmetics Formulation Development

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.

Hello, normally if members wash shampoo or conditioner out of their hair clean enough, there will be a substance Sulphur remains in the hair. or on the scalp in very low quantities which does not affect Vitamin C Sulphur does not qualify for hair binding. or scalp when washed off by water So it will come off from the hair and scalp immediately.