Big effect
Preoperative vitamin D was tied to a 65% lower risk of hypocalcemia after parathyroid surgery — but the evidence was low-grade and limited to a specific clinical population.
This is among the first meta-analyses on this pairing, and while the effect size is unusually large, the low quality of evidence and the fact that other outcomes like symptomatic hypocalcemia and calcium supplement needs didn't budge mean the finding should be treated as promising but far from definitive.
Hypocalcemia (low blood calcium) is a common complication after parathyroidectomy. This meta-analysis of 2,750 patients found that giving vitamin D before surgery cut the risk by about 65% (RR 0.35). But the underlying studies were low quality, and the same analysis found no significant effect on several other related outcomes, so the benefit may be narrower than the headline figure suggests — and only applies to people undergoing this specific surgery.
Where this fits in the evidence
This is among the first studies we've indexed on Vitamin D for Reduced Hypocalcemia — treat it as an early signal until more research accumulates.
The study
- Meta-Analysis
- n = 2,750
- 2026-02-26
- Head & neck
- PubMed: 41744130
- DOI: 10.1002/hed.70205
- Full study breakdown →
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.