Products & Health

What good apps and/or sites do you ladies use to compare products such as lotion, shampoo, cream, ect.? I know there's lots of debate (and lawsuits) on what's actually in some of these products and what's best for babies in this time & Era. I understand some (including my own family) have used the same product for years however companies do change what they do (most to save money) over time.