Hi. 

I was wondering if anyone had any thoughts on why in the book in the DSNT chapter Dr. Baumann has a list of problematic preservatives to avoid, but does not list these under the DSNW skin type. 

Is this because you cannot avoid them in products that are for wrinkles?
I am confused by this, because I feel like they should be in both types, but I don't understand why they wouldn't be.

-Vicki