Vitamin A (Retinyl Palmitate) + Vitamin D3 (Calcidiol)
Take together — same timing window amplifies the synergy.
Verdict
Timing plan
Can be taken togetherNothing blocks them — the same window is what produces the synergy below.
What helps
Vitamin A (Retinyl Palmitate) → Vitamin D3 (Calcidiol)
Balance needed for optimal gene transcription · level AVitamin D3 (Calcidiol) → Vitamin A (Retinyl Palmitate)
Both are nuclear hormone receptors · level BSide by side
| Vitamin A (Retinyl Palmitate) | Vitamin D3 (Calcidiol) | |
|---|---|---|
| Bioavailability | 90% | 95% |
| Safety rating | 6/10 | 6/10 |
| Cost per month | $12 | $80 |
| Daily dose | 2500-8000 IU | 5-20 mcg (medical supervision) |
| Best timing | With fat containing meal | With fat containing meal |
| Evidence level | A | B |
How this score was built
- Baseline for any untested pair: 70
- +12 — synergy at evidence level A
- +8 — synergy at evidence level B
- = 90 out of 100
Where to buy
Buying both? Check the timing plan above so they do not cancel each other out.
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Common questions
Can you take Vitamin A (Retinyl Palmitate) and Vitamin D3 (Calcidiol) together?
Take together — same timing window amplifies the synergy. The pair scores 90 out of 100, based on 2 documented interaction records.
What should you not take with Vitamin A (Retinyl Palmitate)?
Nothing in this pairing clashes. Its own page lists everything Vitamin A (Retinyl Palmitate) is documented to conflict with.
When should you take Vitamin A (Retinyl Palmitate) and Vitamin D3 (Calcidiol)?
Vitamin A (Retinyl Palmitate): With fat containing meal. Vitamin D3 (Calcidiol): With fat containing meal. The same window works for both.