Hey Op, I can see where your parents are coming from.
I mean think about it. First it's innocient Whey, then before you know it you're injecting anabolic steroids!
You need to slap some sense into your parents. That's just ridiculous. What's their argument against it?
Whey is nothing but good. Tell them that they ( or you, depending on who buys the grocerys) could be spending their money on worse things; pop, candy, etc.
If you're going to attempt to convince them that Whey is a good thing, and not the devil, then compar yourself to other kids your age. You're probably way more healthy, and are learning about nutrition.
Hell here's an idea. Have your health teacher write you a note saying how good Whey is. HA! That'd be a first.
Well dude, Good Luck with the parent situation. Hopefully you are able to show them the light.