L-theanine is an amino acid. While more research is necessary, possible benefits include managing anxiety, relieving stress, and reducing insomnia. L-theanine is primarily found in green and black tea ...

Most pre-workout supplements are considered safe for many adults, but they are not essential for health or exercise performance. Their ingredient mixes vary widely by brand. Ingredients like caffeine, ...

Acesulfame potassium is an artificial sweetener (also known as Ace-K). Artificial sweeteners have been controversial because of possible health risks. But some of these sugar substitutes offer you a ...