Factfinder Tool - Cancer FactFinder

CLAIM: Smart watch bands cause cancer

Consumer products

What you may have heard Smart and fitness watch bands may contain cancer-causing “forever chemicals” known as PFAS (per- and polyfluoroalkyl substances). These are used in bands made of fluoroelastomer, a kind of synthetic rubber resistant to dirt, water, sweat, and oil. There is growing concern that PFAS in watch bands may be absorbed through…

Person touching smart watch on their wrist

CLAIM: Salt-preserved foods increase your risk of cancer

Diet & nutrition

Definitely or most likely true

What you may have heard High consumption of salt-preserved and pickled foods can increase your risk of gastric cancer. What the science tells us Salt-preserved food includes pickled vegetables, salted fish, and cured meat. Research suggests a correlation between salt-preserved foods and cancer risk, particularly in East Asian countries where consumption tends to be high.…

CLAIM: Root canals cause cancer

Medical Issue or Treatment

Definitely or most likely not true

What you may have heard Bacteria left behind during a root canal procedure can release toxins into the bloodstream and lead to cancer. This idea has gained attention through online forums and alternative health documentaries. What the science tells us Root canals are not linked to cancer. This myth originated from a discredited theory over…

CLAIM: Eating peanut butter causes cancer

Diet & nutrition

Probably not true

What you may have heard Peanut butter consumption can increase your risk of cancer due to potential aflatoxin contamination. What the science tells us Aflatoxins are a family of carcinogenic compounds produced by mold and can be found on various crops, including peanuts, tree nuts, and corn. If contaminated peanuts are used in production, aflatoxins…

CLAIM: Vegetarian diets protect against cancer

Diet & nutrition

Probably true

What you may have heard Adhering to a vegetarian diet can reduce your risk of developing cancer. What the science tells us Plant-based foods are rich in vitamins, minerals, and antioxidants that support overall health. They contain phytochemicals, naturally occurring compounds found in fruits, vegetables, beans, nuts, grains, and seeds, that may help decrease cancer…

CLAIM: Yogurt decreases your risk of cancer

Diet & nutrition

Probably true

What you may have heard Frequent yogurt consumption may decrease your risk of colorectal cancer. What the science tells us Yogurt contains beneficial bacteria that support a healthy gut microbiome, which, according to the National Cancer Institute (NCI), may help slow cancer development and improve response to cancer therapies. Recent studies suggest that long-term yogurt…

CLAIM: Garlic decreases your risk of cancer

Diet & nutrition

Impact on cancer risk undetermined

What you may have heard Eating garlic can lower your risk of developing gastrointestinal cancers. What the science tells us Garlic contains naturally occurring allium compounds that may slow cancer development by supporting healthy cell function and affecting processes involved in tumor growth. Laboratory research suggests that garlic may reduce the risk of certain gastrointestinal…

CLAIM: Eating eggs increases your risk of cancer

Diet & nutrition

Impact on cancer risk undetermined

What you may have heard Frequent egg consumption can increase your risk of cancer. What the science tells us Eggs support overall health and are a key source of protein, fat, vitamins, and minerals. They also contain high levels of cholesterol and their relationship with heart health remains debated. Concerns about cancer risk stem from…

3 and half white eggs on a vibrant yellow/orange background

CLAIM: Epstein-Barr virus causes cancer

Medical Issue or Treatment

Definitely or most likely true

What you may have heard People who have or have had Epstein-Barr virus are at an increased risk of developing certain cancers. What the science tells us Epstein-Barr virus (EBV) is the infection that causes mononucleosis. According to the CDC, 9 out of 10 adults have antibodies showing that they have or have had EBV…

Gloved hand holding test tube that says "Epstein-Barr Virus (EBV) Test" hovering over racks of test tubes

CLAIM: Lemon water prevents cancer

Diet & nutrition

Not evaluated

What you may have heard Frequent consumption of hot lemon water is rumored to prevent or cure cancer. What the science tells us There is no scientific evidence that lemon water has anti-cancer properties. Lemons contain Vitamin C and other antioxidants, which are good for overall health, but no studies show that drinking lemon water,…

CLAIM: Kombucha prevents or treats cancer

Diet & nutrition

Definitely or most likely not true

What you may have heard Some claim that kombucha, a fermented tea drink, can prevent or even cure cancer due to its potentially detoxifying and immune-boosting effects. What the science tells us Kombucha is made by adding a Symbiotic Culture of Bacteria and Yeast (SCOBY) to fermented sweetened tea. While kombucha contains probiotics and antioxidants…

glass bottles of different colors of Kombucha, next to two bigger jars with fabric over the tops

CLAIM: Fish increases your risk of melanoma

Diet & nutrition

Impact on cancer risk undetermined

What you may have heard Frequent consumption of fish can put you at a higher risk of developing melanoma. What the science tells us Fish is widely recommended in dietary guidelines as a valuable source of protein, heart-healthy omega-3 fatty acids, and other essential nutrients. Despite these benefits, some studies have explored a possible link…

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