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Head-to-head evidence comparison — which supplement is right for you?
Vitamin D3 wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
15 of 26 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Luteolin and Vitamin D3 have evidence — compare verdict strength side-by-side.
100-400mg daily
With meals, Can divide into 2-3 doses
Luteolin extract or Luteolin-quercetin complex
2000-4000 IU daily
Morning with breakfast
D3 (cholecalciferol) softgel or liquid
2-4 weeks
2-4 weeks
4-8 weeks
4-8 weeks
4-8 weeks
2-4 weeks
4-8 weeks
Hepatoprotective activity of medicinal plants, their phytochemistry, and safety concerns: a systematic review
Zeitschrift fur Naturforschung. C, Journal of biosciences (2025) · Systematic review
The application of natural products derived from medicinal plants in treating liver injuries is rooted in their efficacy, cost-effectiveness, and safety profile, contributing to their popularity.
Intervention modalities for brain fog caused by long-COVID: systematic review of the literature
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology (2024) · Systematic review · n=17
Noninvasive brain stimulation and hyperbaric oxygen therapy showed promising results in the treatment of brain fog symptoms caused by long-COVID, with improved perfusion and cortical excitability.
Exploring the efficacy and molecular mechanism of Danhong injection comprehensively in the treatment of idiopathic pulmonary fibrosis by combining meta-analysis, network pharmacology, and molecular docking methods
Medicine (2024) · Meta analysis · n=896
These results provided scientific basis for the clinical use of Danhong injection for the treatment of IPF, and provided a new direction to explore the potential mechanism of action of Danhong injection.
Vitamin D supplementation vs. placebo and incident type 2 diabetes in an ancillary study of the randomized Vitamin D and Omega-3 Trial
Nature communications (2025) · Meta analysis · n=5205
Mean body mass index (BMI) was 27.5 kg/m2 (SD = 5.3), with 51% female and 17% Black race/ethnicity.
Vitamin D Supplementation for Patients with Dysmenorrhoea: A Meta-Analysis with Trial Sequential Analysis of Randomised Controlled Trials
Nutrients (2024) · Meta analysis · n=687
TSA revealed that the current RCTs provide sufficient information.
Vitamin D and respiratory tract infections
BMJ (2017) · Meta analysis · n=11321
12% reduction in respiratory infections overall
Evidence limited to systematic reviews and animal studies. Low bioavailability of standard luteolin forms significantly limits effectiveness. Human RCT data lacking for direct neuroprotective effects.
Meta-analysis showed 12% overall reduction in respiratory infections, with greater benefits in severely deficient individuals. Daily dosing more effective than bolus. Conservative estimate assumes most users not severely deficient.
AI-estimated from published studies. Interpret as directional guidance.
Vitamin D3 has a higher evidence score (9/10 vs 8.5/10) and wins in 1 of 3 categories.
For support immune system, Vitamin D3 has a higher relevance score (92 vs 60).
No known interactions between Luteolin and Vitamin D3 have been documented in our database. However, always consult a healthcare provider before combining supplements.