SynthesisAdvances in nutrition (Bethesda, Md.)2024
Comparison of the Effect of Daily Vitamin D2 and Vitamin D3 Supplementation on Serum 25-Hydroxyvitamin D Concentration (Total 25(OH)D, 25(OH)D2, and 25(OH)D3) and Importance of Body Mass Index: A Systematic Review and Meta-Analysis.
Synthesis in Advances in nutrition (Bethesda, Md.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
33 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.
- Pooled it
- Vitamin D supplement intake is associated with better cognition in persons with sleep disturbance and mild cognitive impairment.Sleep medicine · 2026Article
- Personalization and Fortification of In-Space Manufactured Emulsified Beverages for Long-Term Space Travel.Comprehensive reviews in food science and food safety · 2026Review
- Vitamin D in Photosynthetic Organisms and Fungi: Sterol Photochemistry, UV-B Availability, and Biofortification Potential.Current issues in molecular biology · 2026Review
- Effect of vitamin D receptor gene TaqI polymorphism on vitamin D levels and biochemical, inflammatory, and oxidative stress markers in individuals with obesity.Molecular biology reports · 2026Article
- Does Consuming Fresh Ultraviolet Light-Exposed Mushrooms Offset the Seasonal Decline in Serum Total 25OHD in Adults Classified as Overweight and Class I Obese? Results from a Randomized Controlled Trial.Foods (Basel, Switzerland) · 2026Article
- The Vicious Cycle of Diabetic Kidney Disease, Vitamin D Deficiency, and Arterial Hypertension.Healthcare (Basel, Switzerland) · 2026Review
- Vitamin D deficiency and disease conditions relevant to: Orthopaedic translation.Journal of orthopaedic translation · 2026Review
- Vitamin D3 contribution to systemic and local control ofFrontiers in molecular biosciences · 2026Article
- Serum 25-hydroxyvitamin D is associated with islet function in postmenopausal women with type 2 diabetes and osteoporosis.Frontiers in endocrinology · 2026Article
- Serum 25(OH)D3 and advanced liver fibrosis in type 2 diabetes: a Chinese hospital cohort with NHANES validation and mortality follow-up.Frontiers in nutrition · 2026Article
- Vitamin D neuroimmune synaptic plasticity and precision intervention in pediatric neurodevelopmental disorders.Frontiers in aging neuroscience · 2026Review
- Prevalence and non-invasive predictive models of vitamin D insufficiency in Paraguayan youth: the role of body composition and traditional mate consumption.Frontiers in nutrition · 2026Article
- Serum vitamin D levels correlate with metabolic abnormalities and microalbuminuria in diabetic patients: a restricted cubic spline dose-response analysis.Frontiers in nutrition · 2026Article
- Low-Dose Vitamin D3 Supplementation: Associations with Vertebral Fragility and Pedicle Screw Loosening.Journal of clinical medicine · 2025Article
- Optimal serum vitamin D3 levels are associated with lower osteoarthritis risk and better overall health in US adults.Scientific reports · 2025Article
- Adipose Tissue Dysfunction and Metabolic Diseases: The Role of Vitamin D/Vitamin D Receptor Axis.International journal of molecular sciences · 2025Review
- Sensitive and Facile Detection of Vitamin D Based on Fluorescent Labeled Aptamer Probe and Exonuclease I-Assisted Signal Amplification.Journal of fluorescence · 2025Article
- Bone and mineral metabolism in 2-7-year-old Finnish children and their caregivers following vegan, vegetarian, and omnivorous diets.European journal of nutrition · 2025Article
- Joint position on vitamin D prescription in the adult Mexican population by AMMOM, AMEC, AMG, CMIM, CMO, CMR, CONAMEGER, FEMECOG, and FEMECOT.Archives of osteoporosis · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundTwo previous meta-analyses showed smaller differences between vitamin D3 and vitamin D2 in raising serum 25-hydroxyvitamin D [25(OH)D] and a consistently high heterogeneity when only including daily dosing studies.
objectiveThis study aimed to compare more frequently dosed vitamin D2 and vitamin D3 in improving total 25(OH)D and determine the concomitant effect of response modifiers on heterogeneity, and secondly, to compare the vitamin D2-associated change in 25(OH)D2 with the vitamin D3-associated change in 25(OH)D3.
methodsPubMed, EMBASE, Cochrane, and the Web of Science Core collection were searched for randomized controlled trials of vitamin D2 compared with vitamin D3, daily or once/twice weekly dosed. After screening for eligibility, relevant data were extracted for meta-analyses to determine the standardized mean difference when different methods of 25(OH)D analyses were used. Otherwise, the weighted mean difference (WMD) was determined.
resultsOverall, the results based on 20 comparative studies showed vitamin D3 to be superior to vitamin D2 in raising total 25(OH)D concentrations, but vitamin D2 and vitamin D3 had a similar positive impact on their corresponding 25(OH)D hydroxylated forms. The WMD in change in total 25(OH)D based on 12 daily dosed vitamin D2-vitamin D3 comparisons, analyzed using liquid chromatography-tandem mass spectrometry, was 10.39 nmol/L (40%) lower for the vitamin D2 group compared with the vitamin D3 group (95% confidence interval: -14.62, -6.16; I
conclusionsVitamin D3 leads to a greater increase of 25(OH)D than vitamin D2, even if limited to daily dose studies, but vitamin D2 and vitamin D3 had similar positive impacts on their corresponding 25(OH)D hydroxylated forms. Next to baseline 25(OH)D concentration, BMI should be considered when comparing the effect of daily vitamin D2 and vitamin D3 supplementation on total 25(OH)D concentration. This study was registered in PROSPERO as CRD42021272674.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.