Compare Supplements

Side-by-side comparison of 2 supplements

Om39.0

Omega-3

High safety

Pnv7.0

Prenatal Multivitamin

Moderate safety

Evidence

Probably helps

Evidence Score9/10

Studies: 1036

Meta-analyses: 25

Mostly mechanism / observational

Evidence Score7/10

Studies: 63

Meta-analyses: 7

Outcome Verdicts

Prenatal supportLikely helps

Plain-language verdict per shared outcome, pooled from the studies behind each supplement. Shows which one the evidence backs for the same goal.

Pooled effect-size head-to-headBeta

Direct side-by-side from the meta-analysis. Each row is an outcome where ≥2 of your selected supplements have pooled data. Best effect per row highlighted.

Outcome	Omega-3	Prenatal Multivitamin
Prenatal support — Birth Weight + better · grams	+52.3best moderate	+38.2 weak

Click an outcome to see the full ranked table on the goal page.

Dosage & timing

Dosage:

2g EPA+DHA

Best Time:

With meals · with food

Take with food

Form:

Triglyceride form fish oil

Dosage:

1 serving daily as labelled. The verified folic acid evidence rests on 400-800 mcg daily started before conception

Best Time:

With meals · with food

Take with food

Form:

A prenatal containing 400-800 mcg folic acid, started at least one month before conception

What you'll notice

😊 Improved Moodpositive

4-8 weeks

💪 Reduced Inflammationpositive

2-4 weeks

🐟 Fishy Aftertastetrade-off

Immediate

🛡️ Prevents neural tube defectspositive

Requires pre-conception start

⚖️ Less low birthweightpositive

Across pregnancy

🩸 Less maternal iron-deficiency anaemiapositive

Across pregnancy

Safety

High safety

Contraindications:

Fish/shellfish allergy (use algae-based)
Upcoming surgery (stop 1-2 weeks before)

Drug Interactions:

Blood thinners (warfarin, aspirin)
Blood pressure medications

Side Effects:

Fishy burps/aftertasteGI upsetEasy bruising

Moderate safety

Contraindications:

Products supplying more than 10,000 IU/day (3,000 mcg RAE) of preformed vitamin A (retinol) in pregnancy — this is the established Tolerable Upper Intake Level for preformed vitamin A, set by the IOM/NASEM and reaffirmed by EFSA in 2024, with teratogenicity as the designated critical effect
Concurrent use of a separate high-dose vitamin A supplement or prescription retinoid
Haemochromatosis or iron overload (iron-containing products)

Drug Interactions: