A fizzing magnesium drink powder from MAG365, an award-winning formula that turns into ionic magnesium citrate when you add hot water. It suits anyone who finds tablets hard to swallow or simply prefers a warm, relaxing drink in the evening, and magnesium contributes to the reduction of tiredness and fatigue as well as to normal muscle function.

The recipe is refreshingly short: magnesium carbonate and citric acid, nothing else. Stir a teaspoon into a splash of hot water, let it fizz and dissolve, then top up with warm or cold water. Each full 4g serving provides 375mg of elemental magnesium, and this 150g pot holds around 37 servings. It is vegan, unflavoured with a naturally light citrus tang, and free from gluten, soy, added sugar and preservatives. Start with half the dose and build up gradually.