NutriStack
Aspirin Low-Dose and Krill Oil, a caution.
Krill oil provides omega-3 fatty acids that may have mild antiplatelet effects, which can add to low-dose aspirin in higher-risk situations. Usual omega-3 doses generally show low bleeding risk in trials, but high-dose products, procedures, or other blood thinners deserve caution. The concern is stronger when krill oil is used as a concentrated omega-3 supplement rather than a low-dose dietary product.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Aspirin Low-Dose and Krill Oil
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Krill oil provides omega-3 fatty acids that may have mild antiplatelet effects, which can add to low-dose aspirin in higher-risk situations. Usual omega-3 doses generally show low bleeding risk in trials, but high-dose products, procedures, or other blood thinners deserve caution. The concern is stronger when krill oil is used as a concentrated omega-3 supplement rather than a low-dose dietary product.
Mechanism. Krill oil supplies EPA and DHA, which can shift platelet eicosanoid signaling and reduce aggregation modestly. Aspirin irreversibly blocks platelet COX-1, so high-dose omega-3 exposure may add antiplatelet effect.
Recommendation. Use caution with high-dose krill oil while taking low-dose aspirin. Tell your clinician before surgery or dental work, and report unusual bruising, nosebleeds, black stools, or vomiting blood.
Sources (2)
- Javaid M, Kadhim K, Bawamia B, Cartlidge T, Farag M, Alkhalil M. Bleeding Risk in Patients Receiving Omega-3 Polyunsaturated Fatty Acids: A Systematic Review and Meta-Analysis of Randomized Clinical Trials. J Am Heart Assoc. 2024;13(10):e032390. PMID 38742535
- Stonehouse W, Benassi-Evans B, Bednarz J, Vincent AD, Hall S, Hill CL. Krill oil improved osteoarthritic knee pain in adults with mild to moderate knee osteoarthritis: a 6-month multicenter, randomized, double-blind, placebo-controlled trial. Am J Clin Nutr. 2022;116(3):672-685. PMID 35880828
Stack Score
How this pair moves the number.
Effect on the composite score
If both Aspirin Low-Dose and Krill Oil are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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