With 'functional' beverages, brands rush to quench a thirst for drinks that do more than taste good

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The global market has exploded for drinks that promise to do more than just taste good

Supermarket beverage aisles are starting to look a lot more like a pharmacy.

There are sodas made with mushrooms that supposedly improve mental clarity and juices packed with bacteria that claim to enhance digestive health. Water infused with collagen carries the promise of better skin, and energy drinks offer to help burn body fat.

Welcome to the frenzy of functional beverages – drinks designed to do more than just taste good or hydrate. What started in the late 1980s with caffeine- and vitamin-laced energy drinks like Red Bull has grown into a multi-billion-dollar industry. Hundreds of brands are vying for consumers’ attention with increasingly exotic ingredients and wellness-focused marketing.

Feeling stressed? Try a drink with ashwagandha, a shrub long used in herbal medicine. Want to enhance your workout? There are drinks containing chromium, a mineral that may boost metabolism. Want to get in a party mood without alcohol? Multiple companies are making non-alcoholic spirits and beers infused with ingredients like guayusa, a leaf containing caffeine and antioxidants.

Consumer intelligence company NielsenIQ counted 53,000 UPC symbols in the U.S. functional beverage category last year, including all of the different flavors of energy drinks, sports drinks, sodas, waters, shakes and teas that are sold on the premise of enhancing mental or physical health.

Nutritionists say the general trend of consumers seeking out healthier beverages is a good one. But experts also say people should be cautious and read ingredient labels, especially if they are pregnant, taking medication or have other health issues. And they should avoid empty