Can a vegetarian diet lower cancer risk? (2024)

Eating a vegetarian or vegan diet can get a little contentious. One side might argue that meat is bad for your heart, cholesterol levels and other health markers. Those on the other side of the argument might argue that vegan and vegetarian diets are short on nutrients.

Vegetarian diets exclude meat, poultry and fish. Vegan diets exclude all animal products including eggs, cheese and honey.

Can these diets help lower your cancer risk? We spoke to Lindsey Wohlford, MD Anderson Cancer Center employee dietitian. Here’s what she had to say.

Eating too much meat has been linked to cancer. Can you tell us more about that?

Eating too much meat - especially too much processed meat - can increase your risk for certain types of cancers, including colon cancer and esophageal cancer.

Processed meats like deli meat, bacon and hot dogs contain chemical preservatives that can increase your cancer risk. Consuming red meat like beef, lamb or pork increases cancer risk as well.

In addition, how you cook your meat may be affecting your cancer risk. Eating meat cooked at high temperatures using methods like barbecuing and pan-frying can increase your risk of developing kidney cancer.

We recommend eating no more than 18 ounces of cooked meat per week. That’s about the size of three decks of card or four tennis balls. And when choosing protein, look for these healthier options:

  • Plant proteins (beans, legumes and soy)
  • Fish
  • Chicken
  • Turkey
  • Low-fat dairy foods
  • Eggs

Can becoming vegetarian or vegan help lower your cancer risk?

While no diet choice will guarantee that you won’t develop cancer, cutting meat can help you lower your cancer risk.

The American Institute for Cancer Research promotes a plant-based diet. Two-thirds or more of your plate should be plant-based foods.

That’s in part because plant-based foods contain phytochemicals, the nutrients that your immune system needs to fight off diseases like cancer. Plant-based foods also contain more fiber, which can help lower your cancer risk. Fiber not only keeps you feeling full longer, but it helps you lower your cholesterol, stabilize your blood sugar levels and manage your bowels. Meat just doesn’t do that.

Do vegetarians and vegans miss out on important nutrients?

Animal products do contain healthy nutrients like protein, vitamin B12, vitamin B6 and iron. Someone eating vegan or vegetarian could be missing these important elements, but they are fairly easy to get from certain plant foods. Vegetarians might need to put in a little more effort to ensure that they get these nutrients. Vegans face an even bigger challenge in eating a balanced diet because their food choices are more restricted. It is not impossible to achieve a balanced vegetarian or vegan diet, but it does require some planning. A registered dietitian can help you make a plan.

Vegetarians and vegans should also make sure they’re not replacing meat with processed or unhealthy foods. Simply cutting meat or animal products doesn’t necessarily make your diet healthy.

Can a vegetarian diet lower cancer risk? (2024)

FAQs

Do vegetarians reduce the risk of cancer? ›

Eating a vegan, vegetarian or lacto-ovo vegetarian diet significantly reduces the overall risk of developing cancer, heart disease and dying early from cardiovascular disease, according to a new “umbrella” analysis of more than 20 years of research.

What is the number one cancer fighting food? ›

"Cancer-fighting foods"

The list is usually topped with berries, broccoli, tomatoes, walnuts, grapes and other vegetables, fruits and nuts. "If you look at the typical foods that reduce cancer risk, it's pretty much all plant foods that contain phytochemicals," says Wohlford.

What diet has the lowest cancer rate? ›

Compared with regular meat-eaters, the risk of developing any type of cancer was lower in low meat-eaters (2% less), fish-eaters (10% less), and vegetarians (14% less).

What diet is best for cancer prevention? ›

No food or food group can prevent cancer and excluding specific foods won't eliminate your risk. But eating meals rich in healthy foods like vegetables, whole grains, beans and fruit and following some basic guidelines can help you reduce your risk for cancer and several other chronic diseases.

Why do people with cancer go vegan? ›

Eat more of what matters at meals and snacks. Nutrient-dense plants provide a variety of nutrients and phytochemicals to support health and recovery. For people in cancer treatment, fruits, vegetable, whole gains, lean proteins, healthy fats and hydration support positive treatment outcomes and side effect management.

Is eating meat a cancer risk factor? ›

Eating processed meat increases your risk of bowel and stomach cancer. Red meat, such as beef, lamb and pork, has been classified as a Group 2A carcinogen which means it probably causes cancer. Did you know if you've had cancer, maintaining a healthy diet can help prevent it from coming back?

What starves cancer cells? ›

Ketones become the energy to cells in the body. Early (preclinical) studies showed that some cancer cells can't use ketones as energy. So, changing the diet to be high in fat and low in carbohydrate will lower glucose levels and starve cancer cells. Normal body cells adapt and can use ketones to survive.

What triggers cancer cells to grow? ›

Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes. A DNA change can cause genes involved in normal cell growth to become oncogenes. Unlike normal genes, oncogenes cannot be turned off, so they cause uncontrolled cell growth.

What foods cause cancer cells to self-destruct? ›

Red grapes (and red wine) are loaded with resveratrol, which inhibits cancer-cell growth and causes cancer cells to self-destruct.

What kills cancer cells in the body? ›

Different cells fight different types of cancer. For example, one way the immune system fights cancer is by sending out a special form of white blood cells called T cells: The T cells see cancer as “foreign” cells that don't belong in the body. The T cells attack and try to destroy the cancerous cells.

What diet is linked to cancer? ›

High-fat, low-fibre diets may increase the risk of many cancers including bowel, lung, prostate and uterine cancers. Reducing alcohol intake and maintaining a healthy body weight may reduce the risk of many cancers.

How to stop cancer cells from growing? ›

Histone deacetylase inhibitors. Histone deacetylase inhibitors are also called HDAC inhibitors or HDIs. They block the action of a group of enzymes that remove chemicals called acetyl groups from particular proteins. This can stop the cancer cell from using some genes that would help it to grow and divide.

Do vegans get less cancer? ›

Can becoming vegetarian or vegan help lower your cancer risk? While no diet choice will guarantee that you won't develop cancer, cutting meat can help you lower your cancer risk. The American Institute for Cancer Research promotes a plant-based diet.

What foods shrink tumors? ›

Summary: Broccoli contains sulforaphane, a compound that has been shown to cause tumor cell death and reduce tumor size in test-tube and animal studies. A greater intake of cruciferous vegetables may also be associated with a lower risk of colorectal cancer.

Do cancer cells feed on protein? ›

Researchers from Sohail Tavazoie's Laboratory of Systems Cancer Biology found that in a variety of human cancers, this amino acid becomes limited, prompting these cells to seek a clever genetic workaround: when arginine levels drop, they manipulate proteins at their disposal to more efficiently take up arginine and ...

Do vegetarians have a lower risk of disease? ›

Vegetarian and vegan diets linked to lower risk of heart disease, cancer and death, large review finds. An analysis of nearly 50 studies suggests that plant-based diets have a multitude of health benefits.

Will people be healthier if they become vegetarian? ›

Health benefits of a vegetarian diet

A well-balanced vegetarian or vegan diet can provide many health benefits, such as a reduced risk of chronic diseases, including: obesity. coronary heart disease. hypertension (high blood pressure)

Do vegetarians have lower rates of breast cancer? ›

While some studies have observed that those who follow a vegetarian diet have a lower risk of developing cancer as a whole, no individual study has been able to show with enough reliability that vegetarians have a lower risk of developing specific cancers (eg colorectal cancer, breast cancer or prostate cancer).

What culture has the lowest cancer rate? ›

Asian individuals had the lowest cancer death rates across age groups. Compared with Asian individuals, total cancer death rates were 39% higher in NHPI men and 73% higher in NHPI women. Conclusions: There were striking racial and ethnic disparities in cancer death rates during 2018-2020.

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