Tri-Magnesium Citrate 900 mg is specially formulated for the prevention and treatment of Magnesium deficiencies. It supports bone health by regulating the absorption of Calcium and is an important mineral required to support muscle function. Tri-Magnesium Citrate can improve PMS symptoms such as mood changes and helps reduce the duration and symptoms of mild migraines. It also helps to relieve muscle cramps and mild muscle spasms when dietary intake is inadequate.