Anyone else overwhelmed trying to figure out if teen supplements are safe?

My 16 year old nephew asked me to buy him this protein and recovery stack he saw on TikTok. The label looked pro, but the ingredients list was 15+ long and full of stuff I’d never heard of. I spent over an hour Googling just three of them and still couldn’t figure out if they were safe for someone still growing. I’m not against supplements, but why is it so hard to get straight answers?