[Misc] What is the most valuable thing you've learned about skincare so far?

Beauty Tips For Body Care
I've learned a lot about skincare in the last year, and I was recently thinking about what information has been the most valuable and impactful. Here's my list:Tretinoin can reverse signs of aging.Some of the skin concerns I attributed to aging were due to insufficient moisturizing.... AKA bring on the Vaseline.Skin is slightly acidic, and skincare products should be slightly acidic too.Mild chemical exfoliation works wonders at improving skin texture.http://incidecoder.com tells you the purpose (and some mechanisms of action) for every ingredient in many skincare products.What are the most valuable things you learned? Did you have any "Aha! moments" as you learned more about skincare?
Girls Blog 2015
Submitted by datcortextho