Myth-buster
Combination vitamin D therapies raised blood levels more than D3 alone in a meta-analysis of 867 children with rickets — a finding that may not apply to healthy people.
This is one of the first systematic reviews to directly compare combination vitamin D regimens against monotherapy for rickets, so the evidence is still early; the benefit was seen only in a clinical pediatric population, meaning it doesn't tell us whether mixing supplements is better for the average person.
A network meta-analysis of 10 randomized trials found that children with rickets who received vitamin D combined with other nutrients (such as calcium or other vitamin D forms) had significantly higher blood levels of 25-hydroxyvitamin D than those given vitamin D3 alone. However, the results come from a specific clinical group — children already diagnosed with rickets — and the dose used was not specified, so the findings should not be generalized to healthy adults or to routine supplementation without further research.
Where this fits in the evidence
This is among the first studies we've indexed on Vitamin D for Increased Serum Albumin Levels — treat it as an early signal until more research accumulates.
The study
- Systematic Review
- n = 867
- 2026-04-08
- Frontiers in nutrition
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.