What Happens When You Take Omega-3s and Probiotics Together?

What Happens When You Take Omega-3s and Probiotics Together?

Key Takeaways

  • Combining omega-3 fatty acids and probiotics enhances the benefits of both supplements.
  • Omega-3s and probiotics primarily improve health by balancing bacteria in the digestive tract and reducing inflammation.
  • Taking these supplements together may result in mild gastrointestinal side effects such as gas or stomach pain.

Pair probiotics with omega-3s for synergistic benefits: the combined effect of these supplements is greater than the sum of their individual perks.

1. Your Gut Health May Get a Boost

  • The balance between good and bad bacteria in your digestive tract (gut microbiome) is crucial to your overall health.
  • Having a bacterial imbalance in the gut (dysbiosis) is associated with chronic health conditions, including type 2 diabetes, heart disease, and cancer.
  • Research has shown that improving gut health may also support your metabolism, immune system, cognitive function, and other aspects of overall well-being.
  • Both probiotics and omega-3s can boost digestive system health by increasing good bacteria in your intestines and reducing bacteria that cause disease.
  • These supplements may also help reduce swelling (inflammation) in the digestive tract through different pathways.
  • Because omega-3s function as prebiotics, taking them with probiotics produces what’s called a synbiotic effect: improved intestinal health versus what either supplement can do alone.

2. Your Levels of Inflammation May Be Reduced

  • Both omega-3 fatty acids and omega-3s lower inflammation markers in the body, such as interleukin-6 and C-reactive protein. High levels of these markers show that the body is responding to pain and swelling.
  • An imbalance between good and bad bacteria in the gut can cause a chronic state of mild pain and swelling.
  • Supplementing with omega-3s and probiotics, or incorporating them into the diet, may help improve health conditions associated with this type of persistent inflammation. These include type 2 diabetes, high cholesterol, metabolically active steatotic liver disease (MASLD), and colon cancer.
  • Taking omega-3s with probiotics may also help mitigate some of the effects of aging-related inflammation, though more research is needed to confirm this.

3. Your Liver Function May Be Supported

  • Omega-3s help protect the liver by reducing cholesterol and triglycerides that harm liver cells.
  • Probiotics help support the liver by balancing gut bacteria. Most of the blood supply to the liver originates in the intestinal tract, so an imbalance in the intestinal bacteria can lead to liver disease.
  • The combination of omega-3 fatty acids and probiotics enhances liver function in people with MASLD, a chronic liver disease.
  • Animal studies also show that taking omega-3s with probiotics can reduce liver fat and slow the progression of MASLD.

4. Your Muscle Strength May Get a Boost

  • A study of 60 elite swimmers found that combining probiotics with omega-3 fatty acids increased muscle strength.
  • Although more research is needed, the combination appears to be effective by improving gut health, which is often disrupted in athletes, reducing inflammation, and enhancing muscle recovery.
  • This research is preliminary, and further research is needed to confirm these results.

What Are Probiotics and Omega-3s?

  • Probiotics are live microorganisms (bacteria and fungi) that are found in foods like yogurt.
  • Probiotics improve gut health and reduce swelling (inflammation) and cholesterol levels. They also help the body absorb (take in) omega-3 fatty acids.
  • Omega-3 fatty acids are found in plant and fish oils. They include alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).
  • Omega-3s help protect against heart disease. They can also act as prebiotics (fuel that helps probiotics grow).

Are Probiotics and Omega-3s Safe for Me?

  • Consuming omega-3s and probiotics through your diet or as dietary supplements is safe for most people.
  • Note that taking these supplements together may cause mild gastrointestinal side effects, such as gas, bloating, nausea, or stomach pain.
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Son KH, Lee J, Yang HY, et al. Combined effect of probiotics and omega-3 fatty acids on blood and liver function biomarkers and gut microbiota diversity in male mice with high fat diet-induced obesityPLoS One. 2025;20(9):e0331981. Published 2025 Sep 24. doi:10.1371/journal.pone.0331981

  2. Maymandinejad I, Hemmatinafar M, Jäger R, et al. Synergistic effects of probiotic and omega-3 supplementation with ultra-short race pace training on sprint swimming performanceNutrients. 2025;17(14):2296. Published 2025 Jul 11. doi:10.3390/nu17142296

  3. National Institutes of Health. Omega-3 Fatty Acids.

  4. National Institutes of Health. Probiotics.

  5. Hutchinson AN, Tingö L, Brummer RJ. The potential effects of probiotics and ω-3 fatty acids on chronic low-grade inflammationNutrients. 2020;12(8):2402. Published 2020 Aug 11. doi:10.3390/nu12082402

  6. Madhogaria B, Bhowmik P, Kundu A. Correlation between human gut microbiome and diseasesInfect Med (Beijing). 2022;1(3):180-191. Published 2022 Aug 24. doi:10.1016/j.imj.2022.08.004

  7. Tingö L, Hutchinson AN, Bergh C, et al. Potential modulation of inflammation by probiotic and omega-3 supplementation in elderly with chronic low-grade inflammation-A randomized, placebo-controlled trialNutrients. 2022;14(19):3998. Published 2022 Sep 27. doi:10.3390/nu14193998

  8. Kobyliak N, Abenavoli L, Falalyeyeva T, et al. Beneficial effects of probiotic combination with omega-3 fatty acids in NAFLD: a randomized clinical studyMinerva Med. 2018;109(6):418-428. doi:10.23736/S0026-4806.18.05845-7

  9. Golkhalkhali B, Rajandram R, Paliany AS, et al. Strain-specific probiotic (microbial cell preparation) and omega-3 fatty acid in modulating quality of life and inflammatory markers in colorectal cancer patients: a randomized controlled trialAsia Pac J Clin Oncol. 2018;14(3):179-191. doi:10.1111/ajco.12758

  10. Kizilaslan N, Zekiye Erdem N, Katar M, et al. The effects of probiotics and omega-3 fatty acids in liver steatosis induced in rats by high-fructose corn syrupInt J Clin Pract. 2022;2022:7172492. Published 2022 Jan 31. doi:10.1155/2022/7172492

  11. Schwenger KJ, Clermont-Dejean N, Allard JP. The role of the gut microbiome in chronic liver disease: the clinical evidence revisedJHEP Rep. 2019;1(3):214-226. Published 2019 Jul 31. doi:10.1016/j.jhepr.2019.04.004

  12. Hijová E. Benefits of biotics for cardiovascular diseasesInt J Mol Sci. 2023;24(7):6292. Published 2023 Mar 27. doi:10.3390/ijms24076292

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By Megan Nunn, PharmD

Nunn is a community pharmacist in Tennessee with 12 years of experience in medication counseling and immunization.