Post-Surgery Fish Oil: When Is It Safe to Start Taking? - Nutrition

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Postoperative consumption of fish oil?


Hello, doctor.
I just had minimally invasive surgery last week to remove a fibrocystic mass, and there are still some blood clots in the wound.
The breast surgeon said they will be reabsorbed on their own.
Is it okay to take fish oil in this situation? How long after the surgery would you recommend starting supplementation? Thank you.

Niming, 20~29 year old female. Ask Date: 2023/12/16

Dr. Huang Yuru reply Nutrition


Hello, the DHA and EPA found in fish oil are types of Omega-3 fatty acids, which help the body combat inflammation and protect cardiovascular health by inhibiting platelet aggregation.
Since you just underwent minimally invasive surgery last week and still have a wound, the anticoagulant properties of fish oil may affect wound clotting and healing.
Therefore, it is recommended that you wait until the wound has completely healed before supplementing.
However, due to individual differences in medical treatment, it is advisable to consult with your doctor before starting any supplementation.
If you are considering fish oil to prevent breast cysts, it is still recommended to maintain a balanced diet, choose low-stimulus, low-fat, and low-oil foods, and follow a regular lifestyle to achieve the best preventive effects.
Wishing you good health from the Changhua Hospital, Ministry of Health and Welfare.

Reply Date: 2023/12/16

More Info


After undergoing a surgical procedure, such as the excision of a fibrocystic mass from the breast, it's essential to consider the timing and safety of resuming dietary supplements like fish oil. Fish oil is known for its anti-inflammatory properties and omega-3 fatty acids, which can be beneficial for overall health. However, there are specific considerations to keep in mind regarding its use post-surgery.

Firstly, it is crucial to understand that fish oil can have blood-thinning effects. This is primarily due to its ability to inhibit platelet aggregation, which can increase the risk of bleeding, especially in the immediate postoperative period. Since you mentioned that there is still a bit of blood clot in your surgical site, it is advisable to wait until the healing process is more advanced before introducing fish oil into your diet. Generally, most healthcare providers recommend waiting at least 1-2 weeks after surgery before starting fish oil, particularly if there are any concerns about bleeding or if the surgical site is still healing.

The exact timing can vary based on individual circumstances, including the extent of the surgery, your overall health, and any other medications you may be taking. It is always best to consult with your surgeon or healthcare provider for personalized advice. They can assess your specific situation, including the condition of your wound and any potential risks associated with starting fish oil.

In addition to the timing, consider the dosage of fish oil you plan to take. If you receive the green light from your healthcare provider to start taking fish oil, begin with a lower dose to monitor how your body responds. This cautious approach can help mitigate any potential adverse effects while still allowing you to benefit from the anti-inflammatory properties of fish oil.

Moreover, it is essential to maintain a balanced diet rich in vitamins and minerals that support healing. Nutrients such as vitamin C, zinc, and protein play a vital role in wound healing and recovery. Incorporating foods rich in these nutrients can complement the benefits of fish oil.

In summary, while fish oil can be beneficial for health, it is prudent to delay its use until you have sufficiently healed from your surgery, particularly if there is still blood present in the surgical site. A waiting period of 1-2 weeks is commonly recommended, but always follow the advice of your healthcare provider for the best outcomes. They can provide guidance tailored to your specific situation, ensuring that you can safely incorporate fish oil into your recovery plan without compromising your healing process.

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