3 STEP GUIDE FOR EVALUATING THE QUALITY OF COSMETIC PRODUCTS. Shampoo, hand soap, tooth paste and deodorant, are just a few of the skin care products that we all use in our everyday life. Unfortunately, behind the shiny attractive label often is hidden a product containing potentially undesired substances, ethically not approved ingredients or even harmful chemicals, many of which have been accused of causing hormonal disorder, degenerative diseases and carcinogenesis.