![John Minchillo A person drinks Poppi, a prebiotic soda, on Wednesday, April 10, 2024, in New York. A fitness instructor described functional drinks like Poppi as a "guilt free indulgence." (AP Photo/John Minchillo)](https://mapi.associatedpress.com/v2/items/c06a0fe99d1442a7b50b2ef44fae86e4/preview/preview.jpg?s=680x&wm=false)
A person drinks Poppi, a prebiotic soda, on Wednesday, April 10, 2024, in New York. A fitness instructor described functional drinks like Poppi as a "guilt free indulgence." (AP Photo/John Minchillo)
![Mike Stewart Cans of Olipop, a soda containing botanicals, plant fibers, and prebiotics, are shown at a Kroger supermarket, Friday, April 12, 2024, in Marietta, Ga. U.S. sales of prebiotic and probiotic drinks more than tripled last year. (AP Photo/Mike Stewart)](https://mapi.associatedpress.com/v2/items/14ee88876b934ce3b899b6343eeec38c/preview/preview.jpg?s=680x&wm=false)
Cans of Olipop, a soda containing botanicals, plant fibers, and prebiotics, are shown at a Kroger supermarket, Friday, April 12, 2024, in Marietta, Ga. U.S. sales of prebiotic and probiotic drinks more than tripled last year. (AP Photo/Mike Stewart)
![John Minchillo A can of Celsius, a fitness drink that is supposed to accelerate metabolism and burn body fat, is shown on Wednesday, April 10, 2024, in New York. The frenzy of functional beverages – drinks designed to do more than just taste good or hydrate - has grown into a multi-billion-dollar industry. (AP Photo/John Minchillo)](https://mapi.associatedpress.com/v2/items/740344cba53046ffa6ffe44142e06211/preview/preview.jpg?s=680x&wm=false)
A can of Celsius, a fitness drink that is supposed to accelerate metabolism and burn body fat, is shown on Wednesday, April 10, 2024, in New York. The frenzy of functional beverages – drinks designed to do more than just taste good or hydrate - has grown into a multi-billion-dollar industry. (AP Photo/John Minchillo)
![John Minchillo A Remedy Organics plant-based shake with prebiotics, lion's mane, and other ingredients, is shown on Wednesday, April 10, 2024, in New York. The frenzy of functional beverages – drinks designed to do more than just taste good or hydrate - has grown into a multi-billion-dollar industry. (AP Photo/John Minchillo)](https://mapi.associatedpress.com/v2/items/eb82559b39cb436ba84ce92a7d219bd6/preview/preview.jpg?s=680x&wm=false)
A Remedy Organics plant-based shake with prebiotics, lion's mane, and other ingredients, is shown on Wednesday, April 10, 2024, in New York. The frenzy of functional beverages – drinks designed to do more than just taste good or hydrate - has grown into a multi-billion-dollar industry. (AP Photo/John Minchillo)
![Mike Stewart Cans of Olipop, a drink containing botanicals, plant fibers, and prebiotics, displayed at a Kroger supermarket, Friday, April 12, 2024, in Marietta, Ga. The frenzy of functional beverages – drinks designed to do more than just taste good or hydrate - has grown into a multi-billion-dollar industry. (AP Photo/Mike Stewart)](https://mapi.associatedpress.com/v2/items/e4858eaed4464e078c4eda9e3b5f376f/preview/preview.jpg?s=680x&wm=false)
Cans of Olipop, a drink containing botanicals, plant fibers, and prebiotics, displayed at a Kroger supermarket, Friday, April 12, 2024, in Marietta, Ga. The frenzy of functional beverages – drinks designed to do more than just taste good or hydrate - has grown into a multi-billion-dollar industry. (AP Photo/Mike Stewart)
![John Minchillo A can of Odyssey mushroom elixir is shown, Wednesday, April 10, 2024, in New York. Hundreds of brands of functional beverages - drinks designed to do more than just taste good or hydrate - are vying for consumers’ attention. (AP Photo/John Minchillo)](https://mapi.associatedpress.com/v2/items/e5f84fc8f984463fa1abc1d54e667c3d/preview/preview.jpg?s=680x&wm=false)
A can of Odyssey mushroom elixir is shown, Wednesday, April 10, 2024, in New York. Hundreds of brands of functional beverages - drinks designed to do more than just taste good or hydrate - are vying for consumers’ attention. (AP Photo/John Minchillo)