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Calcium and Vitamin D3 are generally complementary — many people take them together. Can be taken together. In older people the pair slightly lowered fracture risk in trials.
Vitamin D raises intestinal calcium absorption. In a Cochrane review of older people, vitamin D plus calcium slightly lowered hip and other fractures, while vitamin D alone did not.
Vitamin D upregulates calcium-binding protein and active calcium transport
What to do: Can be taken together. In older people the pair slightly lowered fracture risk in trials.
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.