Whey Protein: What It Actually Is, And Who Actually Needs It
The most popular supplement in every gym bag. Here's what it does, and whether you're actually one of the people who needs it.
Catechins, particularly EGCG, are the primary active compounds credited with green tea's health effects — antioxidant properties and a modest metabolic-boosting effect that's the basis for its inclusion in many fat-burning products.
A more concentrated, standardized dose of catechins than what's practical to consume through drinking tea alone — useful for research consistency, though drinking several cups of green tea daily provides a meaningful dose too.
The thermogenic (calorie-burning) effect is real but modest — worth roughly an extra 60-100 calories burned per day in some studies, a genuinely small contribution relative to overall diet and exercise.
Concentrated green tea extract supplements, particularly at high doses on an empty stomach, have been associated with rare cases of liver stress in sensitive individuals — taking with food and staying within recommended doses reduces this risk.