16. Overeating fermented food can be dangerous to your health.
While fermented foods can have several health benefits, there’s increasing reason to believe that some fermented foods can increase your risk of nasopharyngeal carcinoma. Much like processed meats, some fermented foods contain high amounts of nitrates and nitrites, which react with proteins in your body to form nitrosamines.
We’re not suggesting you cut fermented foods out of your life completely, especially since the probiotics they provide can be beneficial to gut health. However, be mindful of how much you’re eating, and check ingredient lists if you’re not making your own. Eating a balanced diet that includes fermented foods like pickles, sauerkraut, or kimchi as a treat should be safe.