3am. You know the one. Awake, calm enough, not going back under. Magnesium is involved in over 300 enzymatic reactions, but the one you notice happens at night. It regulates GABA, the neurotransmitter that decides whether you drift off again or lie there listening for the birds. Which form you take matters more than the number on the front of the bottle. Most supermarket magnesium is oxide — cheap, poorly absorbed, hard on the stomach. Ours is three forms, each chosen for where it goes. Bisglycinate, the gentlest, and the one most associated with sleep and relaxation. Citrate, the form used in muscle-function research. Malate, tied to cellular energy. 375mg of elemental magnesium across two capsules. Magnesium contributes to normal muscle function, normal nervous system function, normal psychological function, and the reduction of tiredness and fatigue.* Two capsules, an hour before bed. Bottle, or a refill pouch when you'd rather not buy the plastic again. *EFSA-authorised health claims for magnesium.