| Calcium Carbonate |
Inorganic Salt |
❌ No |
~40% |
Moderate |
Low (Needs Acid) |
Most common form; best taken with meals |
| Calcium Citrate |
Organic Salt |
❌ No |
~21% |
High |
Excellent |
Good for elderly & those with low stomach acid |
| Calcium Gluconate |
Inorganic Salt |
❌ No |
~9% |
Low |
Good |
Often used in IV or emergency formulations |
| Calcium Lactate |
Organic Salt |
❌ No |
~13% |
Moderate |
Good |
Used in food fortification and supplements |
| Calcium Phosphate |
Inorganic Salt |
❌ No |
~39% |
Moderate |
Moderate |
Supports both calcium and phosphorus intake |
| Calcium Citrate Malate |
Chelated (Blended) |
✅ Yes |
~26% |
Very High |
Excellent |
Used in premium supplements & juices |
| Calcium Malate |
Chelated |
✅ Yes |
~15–25% |
High |
Very Good |
Supports bone and muscle metabolism |
| Calcium Orotate |
Chelated (Orotic Acid) |
✅ Yes |
~10–20% |
High |
Very Good |
Cell-level absorption; premium bone support |
| MCHA (Hydroxyapatite) |
Natural Bone Matrix |
⚠️ Complex |
~20–25% |
High |
Very Good |
Contains bone-building minerals & collagen |
| Coral Calcium |
Natural Mineral Source |
❌ No |
Varies |
Moderate |
Moderate |
Often marketed with trace minerals |
