I startet working out 5 months ago. Until now i havent used anything that didnt come from my kitchen table. Yesterday i ordered from bodybuilding.com a 5 lbs gold protein and 15 quest protein bars. Im a little hasty so this is after the decision question. Are they unhealthy for a growing teen. Btw im 18. Could they couse problems. My dad seems they will but still...?
No, protein supplements are made of whey protein, which is the liquid remaining after milk has been curdled and strained. It's not a synthetic product of any kind.
I haven't tried the Gold brand in particular, but I can see that it's being sold by some of the most reputable sites (including here in Norway), so I see no reason doubt its quality.
Your father is right to be concerned, because you hear stories about people abusing supplements all the time. But just to be clear, it's not protein powder that causes this. All of the scary stories are mostly surrounding those who abuse illegal or controlled substances.
Whey is as natural as milk itself, because... well, that's what it is.