pepsi

Drinking coke and pepsi

Q: My question is about consuming coke and pepsi as both of them are not certified by any certifying body like MJC, sanha as they also don't reveal their recipe of the drink which they claim a trade secret. They are right, they have to protect their business. But as Muslims where we remain cautious of consuming halaal food only, is it permissible to drink coke and pepsi?