Does Fish Oil Act as a Blood Thinner? Effects of Fish Oil

Does fish oil act as a blood thinner? Yes, fish oil can influence blood clotting and help keep the blood moving smoothly through the cardiovascular system.

However, taking too much fish oil in combination with blood-thinning medication can prevent the normal formation of blood clots and increase the risk of excessive bleeding.

Discover five potential health benefits of fish oil and learn who should be cautious about taking fish oil supplements. 

What is fish oil?

Fish oil is derived from the flesh of oily fish species such as anchovies, mackerel, salmon, trout, and sardines. 

Fish oil is an exceptionally rich source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), two omega-3 fatty acids that offer potential health benefits.

EPA and DHA play a crucial role in brain health, eyesight, and immune system function, and have been found to promote inflammatory balance, heart function, and cellular integrity.  

Unfortunately, research published in Nutrients found that most people don’t consume enough fatty fish to maintain adequate EPA and DHA levels. 

This may explain why omega-3 fish oils have become one of the most popular dietary supplements in the U.S. and are widely available in liquid, capsule, and pill form.

Watch the video below to discover common signs of omega-3 fatty acid deficiency. 

Does fish oil act as a blood thinner?

EPA and DHA are incorporated into the cell membranes of platelets, a type of blood cell that plays a crucial role in regulating blood clot formation. This increases membrane fluidity and modulates the rate of platelet aggregation and blood clotting. 

While the blood-thinning effects of fish oils are generally considered a health benefit, individuals taking blood-thinning medication should avoid fish oil supplements due to an increased risk of excessive bleeding.

Evidence published in the Journal of Trauma Nursing found that fish oil supplements can augment the effects of anticoagulant drugs such as warfarin and can cause clinically significant bleeding and increased blood loss.

However, it’s important to note that dietary intake of oily fish while taking blood-thinning medication isn’t associated with an increased risk of bleeding. 

5 reasons to take fish oil

The health-promoting effects of fish oils have been extensively studied, and evidence consistently confirms that adequate intake of omega-3 fatty acids is associated with numerous benefits.

Here are five reasons to consider incorporating fish oil into your wellness routine. 

1. Promotes heart health

Omega-3 fatty acids support healthy blood pressure regulation and promote balanced triglyceride and cholesterol levels, which are associated with optimal circulatory functions and overall cardiovascular wellness.  

In addition, EPA and DHA have been shown to support the body’s capacity to balance inflammation, thereby supporting blood vessels and heart health. 

2. Supports healthy inflammatory balance  

Regular intake of fish oil is associated with more balanced inflammatory responses, which play a vital role in maintaining robust immune defenses, overall cellular integrity, skin health, joint mobility, and respiratory functions. 

“The body can convert EPA and DHA into inflammation-modulating compounds linked to various potential health effects, including enhanced brain health and cognitive functions,” explains Dr. Berg. 

3. Helps maintain a healthy body weight 

Omega-3 fatty acids support cellular insulin sensitivity, a crucial factor in maintaining metabolic health. This is linked to improved weight management, hormonal balance, and efficient energy production processes.

Omega-3 fatty acids also play a role in stimulating the production of hormones involved in satiety regulation and may help regulate and minimize hunger and cravings.  

4. Supports emotional wellness  

Research published in Translational Psychiatry found that omega-3 fatty acids may benefit mood regulation, highlighting that both EPA and DHA support the membrane fluidity of neuronal structures linked to overall brain function. 

The authors further state, “EPA may be partly related to the brain’s ability to increase dopaminergic and serotonergic neurotransmission.”

This suggests that EPA may promote the production of serotonin and other critical neurotransmitters, which play a crucial role in maintaining brain health and regulating mood. 

5. Promotes radiant skin

Fish oils can support the skin’s natural barrier, which is vital to retaining moisture and increasing its resilience against everyday challenges and environmental pollutants.

EPA and DHA’s potential to support balanced inflammatory responses is also crucial for maintaining a radiant complexion and offers anti-aging benefits.   

How much fish oil should you take?

Many fish oil supplements contain between 1 and 2 grams of omega-3 fatty acids per serving, which aligns with the general daily intake recommendations for healthy adults. 

However, recommendations released by the National Institutes of Health (NIH) suggest that higher doses may be necessary to support specific wellness goals. 

However, it’s crucial to discuss fish oil supplementation with a healthcare provider to minimize the risk of potential drug interactions and side effects.

Potential downsides of fish oil

Omega-3 fish oil supplements are generally considered safe and well-tolerated when taken in appropriate doses. 

However, fish oils can have an unpleasant fishy aftertaste and may cause bad breath. Taking fish oil supplements with food typically resolves these issues. 

Because fish oils can impact blood clotting, individuals taking blood thinners should avoid omega-3 supplementation. 

In addition, EPA and DHA can modulate blood-pressure control and may cause dangerously low blood pressure if combined with antihypertensive drugs.

Large species of oily fish can accumulate mercury and other environmental pollutants, and the quality of fish oil supplements can vary. 

To minimize your exposure to potentially harmful toxins, opt for high-quality fish oil supplements tested and certified by reputable organizations such as the United States Pharmacopeia (USP).

FAQ

Sources

1. Zhang Z, Fulgoni VL, Kris-Etherton PM, Mitmesser SH. Dietary Intakes of EPA and DHA Omega-3 Fatty Acids among US Childbearing-Age and Pregnant Women: An Analysis of NHANES 2001-2014. Nutrients. 2018;10(4). doi:10.3390/nu10040416 https://pmc.ncbi.nlm.nih.gov/articles/PMC5946201/
2. Gross BW, Gillio M, Rinehart CD, Lynch CA, Rogers FB. Omega-3 Fatty Acid Supplementation and Warfarin: A Lethal Combination in Traumatic Brain Injury. J Trauma Nurs. 2017;24(1):15-18. doi:10.1097/JTN.0000000000000256 https://pubmed.ncbi.nlm.nih.gov/28033135/
3. “Efficacy of omega-3 PUFAs in depression: A meta-analysis | Translational Psychiatry.” nature.com. https://www.nature.com/articles/s41398-019-0515-5
4. “Omega-3 Fatty Acids – Health Professional Fact Sheet.” ods.od.nih.gov. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/