Beet juice is the big endurance-boosting sensation of the past few years. But how much, exactly, do you need? How much does it help? When should you take it? And how long does it last? We’ve got questions, and a new paper in the Journal of Applied Physiology from Andy Jones (the man known on Twitter as @AndyBeetroot)’s group at the University of Exeter has answers. The new paper looks at the dose-response effect of three different amounts of beet juice on several health and exercise outcomes. It’s a great study with tons of good detail, of which I’ll just offer a few highlights.