From the Manufacturer:
Support Bone Health**
100% pure powder
Highly bioavailable calcium
Calcium Citrate is an optimal calcium supplement formulated to exacting specifications. Our calcium is complexed with citric acid for enhanced solubility and contains no other ingredients.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.Produced in a GMP facility that processes other ingredients containing these allergens