When I was younger, I was very reckless about using skincare products. I thought, "What's the worst that can happen?" Indeed, what? I found out the hard way after allergic reactions and several breakouts later. Thus, I've taken to reading (or at the very least, scanning) the label of each product I use. You'll also notice that in most of my skincare and makeup reviews, I provide a snap of the ingredients (when applicable).
I usually Google the ingredients I'm concerned about. Now if you've tried doing that before, you'll notice that getting the results you want can be a challenge. The EWG Skin Deep Cosmetics Database is very helpful, but you'll have to wade through a lot of data to get the info you need. I also like Cosdna since it's more straightforward, but it's not as comprehensive as EWG.
So where else can we go? Fortunately, Human Heart Nature decided to develop an app that functions as an ingredients database.