Can you take Vitamin D3 and Omega-3 Fish Oil together?
Vitamin D is fat-soluble and absorbs significantly better with dietary fat. Fish oil is a convenient fat source that carries its own benefits.
Severity
Info
Evidence
moderate
Timing
Together with a meal.
How it works
Dietary fat stimulates bile secretion and micelle formation in the gut, which is required for fat-soluble vitamin uptake.
The VITAL trial studied this combination (2,000 IU D3 + 1 g omega-3 daily) in nearly 26,000 participants. It found cardiovascular benefits in certain subgroups, particularly those with low baseline fish consumption.
What to do
Take both with a meal. The fat in fish oil capsules provides the lipid environment D3 needs. A convenient way to cover two supplements at once.
Frequently asked
Should I separate Vitamin D3 and Omega-3 Fish Oil?
This is an informational interaction. Vitamin D3 and Omega-3 Fish Oil are generally fine to take together. Fish oil provides the fat D3 needs for absorption
Why do Vitamin D3 and Omega-3 Fish Oil interact?
Dietary fat stimulates bile secretion and micelle formation in the gut, which is required for fat-soluble vitamin uptake.
How strong is the evidence for this interaction?
The evidence is moderate. Some studies support this interaction, but more research may be needed.
About these supplements
Other Vitamin D3 interactions
Other Omega-3 Fish Oil interactions
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This information is for educational purposes only. It is not medical advice and does not diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional.