Magnesium phosphate is a tissue salt that may help relieve spasmodic pains, neuralgic pains, cramps, abdominal colic and menstrual cramps. Magnesium is an important mineral in the human body required by the nervous system and for healthy muscles, especially during times of stress, after exertion or during menses. A deficiency of Magnesium can lead to cramping, as it is required for muscle fibres to relax. Therefore, Mag phos may be helpful whenever there is cramping, colic and spasm, such as menstrual pain or abdominal colic in babies. It may also ease neuralgic pain, such as sciatica or headache.