Caffeine for Endurance Athletes: How Much, When, and Why Some People Don’t Respond

Caffeine is one of the most studied legal performance aids in sport. Most endurance athletes already consume it daily through coffee, tea, or energy drinks, yet questions remain about whether it tr...

The Independent Study That Set Extreme Endurance Apart: Why a True Third-Party Clinical Trial Still Matters in Sports Nutrition

The first Extreme Endurance clinical study stands as a reference point for what independent, full-formula evidence can look like. By keeping the testing facility unknown to the company in advance, ...

If You’re Fasting, Should You Still Take Supplements? What Athletes Get Wrong

Athletes who use intermittent fasting, time-restricted eating, or occasional longer fasts often ask a practical question: can I still take my usual supplements, or will capsules, pills, and calorie...

VO2 Max by Age: What It Is, Why It Falls, and How to Tell If Yours Is Rising

VO2 max is the most oxygen your body can use during hard exercise. It peaks in the late 20s or early 30s, then declines about 10 percent per decade in people who stop training hard. Adults who keep...