Are the marketing claims about probiotics helping with IBS, leaky gut, diarrhea, brain fog, fat loss, and even cancer true?

Protein is well-known for its benefits in terms of body composition and strength.

Caffeine is a widely used stimulant that has been studied extensively and recommended for its ergogenic effects.

Creatine, specifically and most commonly creatine monohydrate, is a popular ergogenic aid that has been studied extensively aside from caffeine.