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.

PepsiCo said Monday it would buy prebiotic soda brand Poppi for $1.95 billion, expanding in the “healthier soda” category at a time when the company is battling falling demand for its traditional beverages and snacks. Shares of PepsiCo were up 1.5% in morning trading.

PepsiCo is buying Dallas-founded prebiotic soda brand Poppi for $1.95 billion, a homegrown beverage that went from farmers markets to Shark Tank on its way