Caffeine doesn’t give you energy. That sentence surprises most people, because it contradicts decades of marketing. But pharmacologically, it’s true. Caffeine doesn’t produce energy. It blocks the signal that you’re tired. Adenosine — a molecule that accumulates in your brain throughout the day and tells your body it’s time to wind down — gets crowded… Continue reading Beyond Caffeine: How the Body Actually Makes Energy (and What Mitochondrial Peptides Can Teach Us)