How to prevent cancer? Eat at least 1 of these 6 foods every day

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Tomáš , 28. 12. 2025

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Victory over insidious cancer begins with the very foods you consume. You will probably be quite surprised, but many of the foods with anti-cancer effects are likely already in your kitchen.

Cancer-fighting foods

No matter how other, often very unhealthy treats may tempt you, it’s good to stick to a diet that includes foods that fight the insidious cancer that can threaten your life.
You can start with the following 6 foods, of which you should eat at least one every day.

1. Fatty fish

Fish oil is very rich in omega-3 fatty acids. These fats are strong anti-inflammatory agents that protect the human body from very dangerous hormones produced during inflammation.
The oil from fish such as wild salmon (not farmed), mackerel, tuna, herring and sardines is particularly valuable.
In addition to the omega-3 fatty acids themselves, fish oil also contains other powerful anti-cancer substances, such as vitamins A and D.

2. Mushrooms

Mushrooms have been used in traditional Chinese medicine for many years. Their most common use is to balance the immune system and to help improve the functions of bodily organs.

These include:
  • Maitake
  • Shiitake
  • Portobello
  • Agaricus Blazei Marrai
  • Oyster mushroom
  • Chaga (shaggy bracket)

All of them contain very valuable substances called beta-glucans, which are considered direct nourishment for white blood cells, the main components of the immune system.
It has been shown that they can also significantly reduce the occurrence of side effects from conventional cancer treatments (chemotherapy and radiation), such as nausea or hair loss.
Studies have even shown that their effect led to tumor reductions of up to 70%.

3. Purple foods

Purple-colored foods are very beneficial for your health.
Dark purple grapes, purple eggplant, blueberries, red beet, plums and cherries all contain a huge amount of anthocyanins.
Anthocyanins are known for killing cancer cells. They also support the function of internal organs and boost immunity.

4. Seeds and nuts

Nuts, such as almonds or Brazil nuts, contain selenium, which is a powerful anti-cancer agent.
Sunflower or pumpkin seeds, on the other hand, are rich in vitamin E and zinc.
Vitamin E strengthens your immune system, while zinc aids the absorption of vitamin C and also performs several other important functions in supporting immunity.

5. Tea (black, green)

Tea contains substances known as catechins. These are compounds that stop the growth of tumor cells and protect against genetic mutations that could lead to cancer.
It has been shown that regular consumption of green tea reduces the risk of stomach cancer compared to those who do not drink it. Studies have also found that regular tea drinkers have a reduced risk of breast, colon, prostate, ovarian and lung cancers.
In addition to green tea, other types of tea – white, black or oolong – also have anti-cancer effects.

6. Yellow and red peppers

Yellow and red peppers are full of vitamin C, beta-carotene and other beneficial substances with anti-cancer effects that strengthen your immune system and neutralize toxins.
Other sources of valuable substances with anti-cancer effects include sweet potatoes, carrots and dried apricots (unsulphured).