Pepsi enters the "healthy" soda wars and buys prebitotic soda brand Poppi for nearly $2 billion, and fans of the beverage are concerned the formula will change.

The snacks and soda maker seeks a stronger foothold in the gut-health soft-drink market.

PepsiCo said Monday it’s acquiring the prebiotic soda brand Poppi for $1.95 billion. The acquisition gives PepsiCo a fast-growing brand in the popular functional beverage category.