This Solgar product focuses on providing calcium and magnesium, primarily utilizing the well-absorbed calcium citrate. This is advantageous as calcium citrate can be taken with or without food and is generally gentler on the stomach. For magnesium, it combines magnesium citrate, known for its good bioavailability and laxative effect at higher doses, with magnesium oxide, which is poorly absorbed. While the oxide form contributes elemental magnesium, its systemic absorption is low, meaning much of it may not be utilized by the body for functions beyond bowel regularity. The 1:1 calcium to magnesium ratio (1000mg each) is balanced. A major limitation for a calcium supplement, particularly one aiming for 'Bone Health', is the complete omission of Vitamin D. Without sufficient Vitamin D, the body struggles to absorb calcium from the gut and integrate it into bones, making the product less effective for its primary structural goals. The price per serving is fair for a reputable brand like Solgar.