Sentinel Magnesium Tablets (500mg) - Supports Muscle and Nerve Function. ‣ 500mg of Magnesium per tablet. ‣ Essential for muscle and nerve function. ‣ Supports bone health and energy production. SUGGESTED USE: Take 1 tablet daily, preferably with a meal, or as directed by your healthcare provider. INGREDIENTS: Magnesium Oxide, Tablet Excipients.