Nutritional Supplementation
Coffee, Tea, or Synthetic? A Research-Based Guide to Choosing Your Caffeine Source
Not all caffeine is biochemically identical in its real-world effects, despite sharing the same molecular formula. From the polyphenol-rich environment of brewed coffee to the isolated anhydrous compounds in pre-workout supplements, the source of your caffeine meaningfully shapes how your body absorbs it, how long it lasts, and what secondary compounds arrive alongside it. Here is what the published research actually demonstrates.