Creatine for 17.5 year old?

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DS goes to the gym almost every day, and has bought a big tub of Creatine. A few quick googles say it's safe, but I don't like the idea. We are vegetarians, and DS is happy with that. I'd rather he got any supplements from real food. He is 17.5. Am I worrying unnecessarily?

This is all new to me, not in the UK so it's not really a thing here... can anyone advise?

I used to take it and although it didn't cause me any harm I thought it was unnecessary to be honest. Also I'm pretty sure it's not recommended for under 18s.

It’s very harmless, and not something I would worry about. I imagine he won’t see any results and it’s expensive so will stop buying it. Ive taken it and it just made me bloated. The worst that will happen is that he wastes his money.