Magnesium plays many vital roles in the body, from the reduction of tiredness and fatigue, the conversion of food into energy and the health of bones and teeth, to the support of psychological function, the nervous system and muscle health, including the neurotransmission and contraction of the heart muscle. Healthspan make their Opti-Magnesium tablets with magnesium citrate and malate, which are two highly absorbable sources, so it is easier for your body to assimilate this nutrient. They also add vitamin D3, which contributes to the absorption of calcium in the body, playing a key role in the health of bones and teeth. It also supports muscle function and the immune system. Finally, they’ve included inulin - a type of soluble fibre that’s also a prebiotic, which naturally promotes friendly bacteria in your gut.