Vitamin D3
Option ABest suited to: Most people choosing a routine vitamin D supplement
Potential advantages
- Commonly available
- Often preferred for maintenance
- Many dose formats
Evidence-led comparison
Vitamin D3 vs D2
Potency, duration, dietary sources and blood-level questions.
Quick verdict
Which one makes more sense?
D3 is generally the more common choice for maintaining vitamin D status, while D2 remains useful in specific dietary or clinical contexts.
D2
Option BBest suited to: People needing a vegan or specifically prescribed D2 option
Potential advantages
- Vegan sources available
- Used in some prescriptions
- Can correct deficiency
Side-by-side decision table
| Question | Vitamin D3 | D2 |
|---|---|---|
| Primary role | Most people choosing a routine vitamin D supplement | People needing a vegan or specifically prescribed D2 option |
| Evidence check | Match the exact form and dose to the outcome studied. | Check whether research supports the specific intended use. |
| Value check | Compare useful active amount per serving, not bottle size. | Compare active amount, servings and total daily cost. |
| Quality check | Prefer transparent labels and independent testing where available. | Avoid undisclosed blends and exaggerated claims. |
SupplaSort scorecard
Evidence
7.8
Clarity
8.6
Value
7.4
Safety
8.2
These are editorial decision-support scores, not clinical effectiveness ratings.
Safety boundary
Avoid prolonged high doses without guidance; testing may be appropriate where deficiency is suspected.
This guide is general information and does not diagnose, treat or replace professional medical advice.
Before buying either option
1. Define the goal
Choose one measurable reason for trying it rather than adding a product “just in case.”
2. Compare like for like
Check active amount, form, serving size, testing and daily cost.
3. Review after a set period
Avoid changing several products at once, and stop if adverse effects occur.