Ok girls, so my FI is trying to lose weight and has been hitting the workouts hard core. He has been working out since Jan and has lost about 20 lbs. I know he uses protein powder/shakes, which I don't have a problem with, but he told he also got some pre and post workout supplements. I'm not sure which supplements he got, but many of the products on bodybuilding look concerning to me with hormones and other chemicals that can be harmful.
Should I be concerned about him taking these or am I being too paranoid (I tend to do that sometimes...

)?