Compare Supplements

Side-by-side comparison of 1 supplements

🥕

Vitamin A

9/10moderate

Evidence

Evidence Score9/10

Studies: 40+

Meta-analyses: 34

Dosage & Timing

Dosage:

2500-5000 IU daily (retinol); up to 25000 IU (beta-carotene)

Best Time:

With fat-containing meal, Any time of day

Take with food

Form:

Mixed carotenoids or low-dose retinyl palmitate

What You'll Notice

👁️ Vision Support80%

2-4 weeks

🛡️ Immune Support70%

2-4 weeks

✨ Skin Health65%

4-8 weeks

Safety

moderate safety rating

Contraindications:

Pregnancy (high-dose retinol is teratogenic)
Liver disease

Drug Interactions:

Retinoid medications (Accutane)
Orlistat
isotretinoin

Side Effects:

Hypervitaminosis ASkin yellowing (beta-carotene)

Works Well With

Zinccomplementary

Vitamin D3complementary

Compare Supplements

Vitamin A

Evidence

Dosage & Timing

What You'll Notice

Safety

Works Well With

Categories

Compare Supplements

Vitamin A

Evidence

Dosage & Timing

What You'll Notice

Safety

Works Well With

Categories