Brazil nuts, a popular snack, have been found to be linked to an increased risk of cancer due to their high content of selenium, a mineral that can boost the immune system and support thyroid function. While Brazil nuts are a good source of antioxidants, fiber, and other essential nutrients, consuming too many of them can lead to selenium toxicity.
The recommended daily intake of selenium is 55 micrograms per day for people over 14 years old, with much lower amounts needed for babies, children, and young teens. However, Brazil nuts contain about 544 micrograms of selenium per ounce, which is equivalent to just six nuts.
Consuming too much selenium can cause a range of symptoms, including nausea, vomiting, diarrhea, hair loss, and arthritis. In fact, research has found that the highest intake of selenium is associated with an increased risk of developing stomach, colon, rectum, and lung cancers.
In contrast, studies have shown that low-dose selenium supplements can actually reduce cancer incidence by up to 49%. However, more research is needed to fully understand the relationship between selenium and cancer.
Experts warn that consuming too much selenium can also impair the effectiveness of immunosuppressants, birth control, and cholesterol medications, while exacerbating the effects of anticoagulants and sedatives. Therefore, it is recommended to only take doctor-advised dosing of selenium supplements.
Source: https://www.dailymail.co.uk/health/article-14623503/common-healthy-superfood-cancer-link-surge-rates.html