NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated August 1, 2026

Supplement × Supplement·Evidence index

Calcium and Vitamin C: what the published research says

PubMed indexes 4 records that name Calcium and Vitamin C together, either in the title or in an interaction, co-administration, or pharmacokinetic context. Each one is listed below with its study design and, where the abstract states one, the authors’ own conclusion, quoted and linked. This page reports that literature. It does not tell you whether to combine them.

Read this first

An evidence index, not guidance.

Every statement below is attributed to a named, dated, linked source.

This page lists published research relevant to Calcium and Vitamin C. It deliberately does not state whether the combination is safe, whether it interacts, in which direction, at what dose, or how far apart to take them.

The research

4 studies naming Calcium and Vitamin C.

Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.

Vitamin C Modes of Action in Calcium-Involved Signaling in the Brain.

Antioxidants (Basel, Switzerland) · 2023 · PMID 36829790

Review

“A growing body of evidence indicates a unique role for vitamin C in these processes. In this short review, we focus on vitamin C in the regulation of calcium-involved pathways under physiological and stress conditions in the brain.”

Zylinska et al. · From the abstract

Names both Calcium and Vitamin C in its title.

No contribution of ascorbic acid to renal calcium oxalate stones.

Annals of nutrition & metabolism · 1997 · PMID 9429689

ReviewHuman subjects

“Recurrent stone formers and patients with renal failure who have a defect in AA or oxalate metabolism should restrict daily vitamin C intakes to approximately 100 mg. But in the large-scale Harvard Prospective Health Professional Follow-Up Study, those groups in the highest quintile of vitamin C intake (> 1,500 mg/day) had a lower risk of kidney stones than the groups in the lowest quintiles.”

Gerster · From the abstract

Names both Calcium and Vitamin C in its title.

Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.

Nutrients · 2025 · PMID 39861409

Systematic ReviewHuman subjects

“Studies highlight the advantages of Calcium ascorbate EC over traditional ascorbic acid in terms of its tolerability and its potential to increase leukocyte vitamin C concentrations, crucial for immune function and protection against infection. However, further research is required to conclusively establish its effects on immune health.”

Calder et al. · From the abstract

Names Calcium and Vitamin C together in an interaction, co-administration, or pharmacokinetic context.

Plasma nutrient status of patients with Alzheimer's disease: Systematic review and meta-analysis.

Alzheimer's & dementia : the journal of the Alzheimer's Association · 2014 · PMID 24144963

Meta-AnalysisSystematic ReviewHuman subjects

“The lower plasma nutrient levels indicate that patients with AD have impaired systemic availability of several nutrients. This difference appears to be unrelated to the classic malnourishment that is well known to be common in AD, suggesting that compromised micronutrient status may precede protein and energy malnutrition.”

Lopes da Silva et al. · Authors' conclusion

Names Calcium and Vitamin C together in an interaction, co-administration, or pharmacokinetic context.

Limitations

What this evidence cannot tell you.

Search-based evidence indexes have real limits, and it is worth being explicit about them:

NutriStack

Track what you actually take.

NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Calcium, Vitamin C, and several hundred other substances.

The checker is a research and organisation tool, not a clinical decision aid, and its per-pair assessments are excluded from search until they pass claim-level review.

NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.