You really stupid.
creatine = protein?
EVery human has creatine in muscles. Proteine is something else.
Milk, eggs, soia, red meat etc contains proteine. And its not fake, its like taking vitamins, go ask your doctor. They are SUPPLEMENTS not steroids. A man can't take all te substances it needs to grow its muscles fully just from food. If you don't take anything, you will grow like 25% of 100%. Thats why they are free to use and dont harm you if you read the prospect and use them how they say.