Is it OK to use vitamin c serum after you use a set of rejuvenating soap toner and creams?

Yes it is okay however it is typically recommended to cleanse, apply any vitamin serums used, and then add in your moisturizer as a final skin care step! Consult with a board certified dermatologist for a customized skin care regimen. Best, Dr. Emer. 

Thank you for your question. It is fine to use vitamin C in conjuction with a toner and creams, but you want to use the thinner products first and move to the thicker products. So you would cleanse your skin, tone, then use your vitamin c serum, and finally use your creams. Wait a minute or 2 in between steps so that the products have some time to dry. I hope this helps. Best of luck to you!

You would want to apply the vitamin C to the skin directly after washing. Vitamin C is best used in the morning.