Does Eating Seafood Cause Cancer Recurrence? Here's the Truth...​

​On the long and arduous journey of fighting cancer, patients and their families tread with utmost caution, where every detail of daily life becomes a focal point of concern. Among the many questions that trouble them, one of the most pressing is: "Can eating seafood trigger cancer recurrence?" Today, let's unravel this mystery together.​​

​​01 The Origins and Evolution of "Heat-Inducing Foods" (Fāwù)​​

Many people avoid seafood because they believe it falls under the category of "heat-inducing foods" (发物). In traditional Chinese medicine (TCM), "heat-inducing foods" refer to foods that may trigger disease recurrence or worsen existing conditions. Common examples include lamb, seafood, coriander, and other items listed in the "heat-inducing food" category. This concept originated from ancient people's empirical observations—when medical knowledge was limited, they noticed that certain foods caused discomfort, such as allergies, digestive issues, or joint swelling and pain. As a result, these foods were classified as "heat-inducing."

However, from a modern medical perspective, the concept of "heat-inducing foods" lacks scientific evidence. Contemporary medical research focuses on the nutritional content, safety, and physiological effects of foods rather than categorizing them based on traditional theories.

​​Seafood: A Misunderstood Nutritional Powerhouse​​

Seafood is actually a nutritional treasure trove, rich in high-quality protein, minerals, and vitamins that offer numerous health benefits. For instance, deep-sea fish are packed with omega-3 polyunsaturated fatty acids, which help regulate inflammatory responses, combat oxidative stress, and may even promote apoptosis (programmed cell death) in cancer cells. Research shows that a diet rich in deep-sea fish can extend the overall survival rate of cancer patients—some studies even suggest it may nearly double their survival time.

Shrimp and crab, for example, provide high-quality protein that is easily digested.This makes it an excellent choice for cancer patients to replenish energy and strengthen their immune systems.

Precautions for Eating Seafood​​

While seafood is highly nutritious, cancer patients should be mindful of the following considerations when consuming it:

• ​​Exercise caution if you have allergies​​: Histamine in seafood is a common allergen. Individuals with allergic constitutions may experience symptoms such as skin itching, redness, swelling, or even life-threatening anaphylactic shock after consumption. If you are allergic to seafood, it is absolutely inadvisable to take the risk.
• ​​Pay attention to food-drug interactions​​: If you are undergoing targeted therapy, chemotherapy, or receiving growth factor injections (e.g., G-CSF for white blood cell boosting), consult your doctor to determine whether seafood might interact with your medications. For example, when receiving growth factor injections, shellfish should be cooked until the shells open—and then boiled for an additional 5 minutes—to ensure safety.
• ​​Ensure seafood quality and proper cooking​​: Always choose fresh, clean, and reliably sourced seafood. Seafood frozen for more than three months may lose nutritional value and harbor bacteria, making it best to avoid. Cook seafood thoroughly to avoid food poisoning from raw or undercooked varieties.

Cancer patients don't need to fear seafood.​​ When consumed at the right time and in the proper way - without allergy concerns - seafood can be both delicious and nutritious, actively supporting recovery. In the fight against cancer, we must trust science, maintain a balanced diet, and cultivate a positive mindset. These factors play a crucial role in recovery.