Vitamin D2
What the European Food Safety Authority and the United States National Institutes of Health have published about vitamin D2 intake, and what the catalogue records. Reference figures and citations only.
Stacky is an organisational tool, not a medical device. It does not provide medical advice, and nothing on this page says what vitamin D2 does. Talk to a doctor or pharmacist before starting, stopping or changing what you take.
Published intake references
Each figure is one authority’s published value, with the kind of figure and the people it applies to as that authority stated them. Where the EU and the US differ, both are shown and neither is averaged or converted. Only a tolerable upper intake level sets a ceiling. A recommended or adequate intake is context, not a limit.
EUEuropean Union — EFSA
Unit: 1 µg = 40 IU EUEFSA
Unit: µg vitamin D equivalents (VDE); 1 µg VDE = 1 µg ergocalciferol (D2) = 40 IU EUEFSA
To cite a figure, cite the authority’s document linked on its card, and this page as where you read it: stacky-app.com/substances/vitamin-d2, retrieved 13 November 2026. Every card has its own address: add #eu-ai-1 to the page URL for the first one.
How it is recorded
What the app records so it can schedule a dose. None of it is advice.
Default time of day in the app: Morning. A person can move it; the app never changes a dose.
Default food note in the app: with food.
Recorded interactions
How Stacky summarises what a named source says about vitamin D2 taken alongside another substance: absorption and nutrient status only. The category and the summary are Stacky’s words; each row links to the source, and the source’s own wording governs. A row without one is not published, and neither is one whose source description names a disease or clinical condition. None of these says whether a combination is good or bad.
| Stacky’s category | Summary, in Stacky’s words | Source |
|---|---|---|
| Documented relationship with Vitamin D3 | Both forms raise serum 25(OH)D, but vitamin D3 raises it more than vitamin D2 and maintains the higher level for longer. Most steps in the metabolism and actions of the two forms are otherwise identical. | NIH ODS Checked 6 Aug 2026 |
Indexed studies
A study reaches this page only if its own title names Vitamin D2 or one of its recorded alternative names, and does not name a disease or clinical condition. The second rule removes papers that are about vitamin D2; a title naming a condition beside a substance reads as a claim, and this page makes none. Titles are the studies’ own words, newest first. A study being listed is not a statement that vitamin D2 does what it set out to test. How this list is built →
| Title | Journal | Year | Reference |
|---|---|---|---|
| Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis. | Am J Clin Nutr | 2012 | PubMed 22552031 |
Showing 1 of the 5 papers indexed against vitamin D2 in Stacky.
About this page
Stacky is a supplement tracking app. It renders what you take and what published sources say about it; it does not tell you what to take. Every figure on this page names the authority that published it and links to that authority’s own page.
Not on this page: a dose of our own, a grade, a verdict on whether vitamin D2 works, or any statement that it treats, prevents or improves a condition. How these pages are built →
Figures are read from the authorities’ published tables and can go out of date when those tables are revised. If one here is wrong, tell us at support@stacky-app.com and we will check it against the source.