Here is a list of common ingredients that could be harmful in your beauty products:
BHA and BHT
Coal tar dyes: p-phenylenediamine and colours listed as “CI” followed by a five-digit number
Parfum (a.k.a. fragrance)
Sodium Laureth Sulfate
More information on which products are certified natural can be found online at Eco-Cert and Cosmos
Tammy-Lynn McNabb and chemist/formulator Anjali Hardikar discuss what the word "natural" actually means when it comes to skincare.