Swisse Ultiboost Magnesium + Sleep Powder is a premium quality formula containing a unique blend of eight nutrients and herbs including choline, inositol, hops and passionflower. Magnesium & Calcium work together to enable the contraction and relaxation of the muscles-magnesium supplementation may also provide support for muscle cramps and spasms when dietary intake of magnesium is low. Free from added lactose or gluten and suitable for vegetarians.