NutriStack
Risedronate and Vitamin D3, a synergy.
Risedronate, like other bisphosphonates, depends on adequate vitamin D status for full bone benefit and for protection against hypocalcemia. Vitamin D deficiency is a recognized predictor of poor BMD response and of post-dose calcium drops.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Risedronate and Vitamin D3
- Pair type
- Synergy
- Evidence (highest tier)
- Strong
- Source citations
- 2 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Synergy · Strong evidence
Synergy
What is happening. Risedronate, like other bisphosphonates, depends on adequate vitamin D status for full bone benefit and for protection against hypocalcemia. Vitamin D deficiency is a recognized predictor of poor BMD response and of post-dose calcium drops.
Mechanism. Vitamin D maintains intestinal calcium absorption and suppresses PTH. When risedronate halts bone resorption, replete vitamin D ensures that calcium supply matches the reduced flux out of bone, keeping serum calcium and remodeling normal.
Recommendation. Take vitamin D3 800-2000 IU daily (or as your clinician directs) while on risedronate, aiming for serum 25(OH)D above 30 ng/mL. Vitamin D can be taken with food at a separate time from your morning risedronate dose.
Sources (2)
- Catalano A, Bellone F, Morabito N, et al. Vitamin D Boosts Alendronate Tail Effect on Bone Mineral Density in Postmenopausal Women with Osteoporosis. Nutrients. 2021;13(6):1878. PMID 34072655
- Wiesner A, Szuta M, Galanty A, Paśko P. Optimal Dosing Regimen of Osteoporosis Drugs in Relation to Food Intake as the Key for the Enhancement of the Treatment Effectiveness-A Concise Literature Review. Foods. 2021;10(4):720. PMID 33805435
Stack Score
How this pair moves the number.
Effect on the composite score
If both Risedronate and Vitamin D3 are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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