NutriStack
Calcium and Methylcobalamin, a synergy.
Calcium may actually assist B12 absorption. Some evidence suggests calcium helps release B12 from food and supports intrinsic factor binding.
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
- Calcium and Methylcobalamin
- Pair type
- Synergy
- Evidence (highest tier)
- Emerging
- Source citations
- 3 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Synergy · Emerging evidence
Synergy
What is happening. Calcium may actually assist B12 absorption. Some evidence suggests calcium helps release B12 from food and supports intrinsic factor binding.
Mechanism. Calcium supports the ileal receptor cubam (cubilin-amnionless) function for intrinsic factor-B12 complex absorption. Adequate calcium ensures proper receptor-mediated endocytosis.
Recommendation. Can be taken together. Calcium does not impair B12 absorption and may mildly assist it.
Sources (3)
- Russell RM et al. Influence of calcium on the bioavailability of vitamin B12. Am J Clin Nutr. 2002
- Liu C, Kuang X, Li K, Guo X, Deng Q, Li D. Effects of combined calcium and vitamin D supplementation on osteoporosis in postmenopausal women: a systematic review and meta-analysis of randomized controlled trials. Food & Function. 2020. PMID 33237064
- Yao P, Bennett D, Mafham M et al.. Vitamin D and Calcium for the Prevention of Fracture: A Systematic Review and Meta-analysis. JAMA Network Open. 2019. PMID 31860103
Stack Score
How this pair moves the number.
Effect on the composite score
If both Calcium and Methylcobalamin 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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