64
SCORE
Cod liver oil
Omega-3 · Vitamin A · Vitamin D
Tier 2 — Promising
What it is
A traditional supplement that provides omega-3 EPA and DHA alongside preformed vitamins A and D. Good option for people in northern climates with limited sun exposure. However, the vitamin A content limits how much you can safely take — high doses risk vitamin A toxicity, especially in pregnancy. Modern concentrated fish oil provides more EPA and DHA per capsule without the vitamin A ceiling.
Efficacy
3/5
Safety
3/5
Research
3/5
Onset
3/5
Cost
4/5
Drug-int.
4/5
Dose
1 teaspoon/day (providing ~1 g omega-3 + 1,000 IU D + 3,000 IU A); do not exceed due to vitamin A
Time of day & tips
Take with a fatty meal for best absorption. Do not exceed 1 teaspoon daily due to vitamin A toxicity risk. Refrigerate after opening.
Sensitive populations: This supplement's evidence base touches pregnancy, pediatric, or other sensitive populations. Confirm any change with your healthcare provider before use.
Compare or learn more
Compare with another supplement →
Browse by symptom →
Open the full interactive view →