Top Nutritionals Natural Calm Ionic Magnesium Citrate Powder - Organic Lemon Flavour - A better-tasting, better-absorbing, best-loved magnesium drink. The proprietary magnesium citrate formula is fast-acting, to relieve stress, improve sleep, reduce pain, promote heart health and more. The 100% water-soluble magnesium citrate becomes ionic when dissolved in very hot water and can relieve many symptoms associated with magnesium deficiency quickly and effectively. Magnesium helps the body to metabolize carbohydrates, fats and proteins. It also aids in the development and maintenance of bones and teeth.