Core Insights - Calcium is essential for maintaining bone health, yet insufficient dietary intake and low absorption efficiency are common issues. Proper calcium supplementation involves selecting the right type of calcium, accompanying nutrients, and dosage forms to enhance effectiveness [1] Product Summaries Calcium Tablets - **Caltrate Calcium D3 Tablets**: Contains 600mg of calcium carbonate and 125 IU of vitamin D3. It utilizes micro-pulverization technology to enhance dissolution speed and absorption rate. The addition of imported vitamin D helps in preventing osteoporosis [4] - **Swisse Calcium Citrate Tablets**: Comprises 333mg of calcium citrate, 665 IU of vitamin D, and 60μg of vitamin K. It is gentle on the gastrointestinal tract, dissolves quickly in water, and helps avoid gastrointestinal discomfort while promoting calcium deposition in bones [8] Calcium Capsules - **By-Health DK Calcium Capsules**: Contains 500mg of calcium carbonate, 360 IU of vitamin D, and 24μg of vitamin K. It features a three-in-one formula that aids in calcium absorption and deposition in bones [11] - **Schiff Vitamin D and K Softgels**: Composed of 500mg of calcium (both carbonate and citrate), 360 IU of vitamin D, and 24μg of vitamin K. It promotes calcium absorption in the intestines and its deposition in bones [15] Liquid Calcium - **Mom's Garden Liquid Calcium**: Contains 500mg of patented organic calcium (salmon bone calcium and calcium citrate), 400 IU of vitamin D, and 30μg of vitamin K. It boasts a six-fold absorption rate compared to other calcium types and includes collagen for joint repair [18] - **Caltrate Liquid Calcium**: Comprises 300mg of calcium citrate, 30mg of casein phosphopeptide (CPP), 2.3mg of zinc, 5μg of vitamin D, and 22.5μg of vitamin K. It enhances calcium absorption and prevents sedimentation [21] Recommendations - For individuals with sensitive stomachs, calcium citrate or organic calcium options are recommended, particularly liquid forms [22] - For optimal absorption and comprehensive bone nutrition, products containing vitamin D3, K2, collagen, or CPP are advisable [22] - For those without constipation issues seeking cost-effectiveness, traditional calcium carbonate products are a reliable choice [22]