Tri-Magnesium - 90 Tablets (NF Formulas) Supports cellular metabolism. Magnesium is needed for bone formation and making new cells. Magnesium supplementation may also support the maintenance of healthy cholesterol levels already within normal limits, and is well-known for supporting the immune system. May also support the maintenance of healthy cholesterol levels already within normal limits, and is well-known for supporting the immune system. Recommendations Take 1 tablet once or twice daily.