The immediate magnesium source for post-sweating activities such as triathlon, marathon, trail running, mountaineering, cycling and swimming. Also useful for replenishment during physical exertion. Recommended for general maintenance, pre-race conditioning, and daily sports supplementation. Contains 70% magnesium phosphates for bone health and 30% in muscle form, plus 1% in blood. Commonly used for recovery after exercise and for magnesium supplementation. Nutrition Facts: Serving size 3.7 g, 11.1 kcal, 0.409 g protein, 0 g fat, 2.9 g carbs, 0.1-1 mg sodium, 200 mg magnesium.