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Calcium and Red Clover can be taken together. Any benefit from combining them rests on limited evidence. Red clover isoflavones (40–80 mg/day) can be taken with calcium (1000–1200 mg/day) and vitamin D3, but a bone-protection benefit has not been shown.
No trial cited here tested red clover with calcium against calcium alone. In a 2-year placebo-controlled trial in postmenopausal women, a red clover isoflavone extract did not improve bone density at any site.
Red clover isoflavones (formononetin, biochanin A, daidzein, genistein) bind estrogen receptor-β on osteoblasts, promoting bone formation and reducing osteoclast activity. Estrogen receptor signaling upregulates calcium transporter expression and osteocalcin synthesis.
What to do: Red clover isoflavones (40–80 mg/day) can be taken with calcium (1000–1200 mg/day) and vitamin D3, but a bone-protection benefit has not been shown.
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.