Doctors often warn against processed foods, excess sugar, and saturated fats. These foods can raise the risk of chronic conditions, including neurological issues like stroke and dementia. Neurologist Dr. Baibing Chen said he avoids four specific foods that many people don't realize can seriously impact brain health.  In addition to those, certain lesser-known foods can also pose serious risks to brain health. Damaged canned foods, those that are bulging, cracked, or dented, may contain botulinum toxin, a powerful neurotoxin that can cause paralysis and respiratory failure.  The toxin has no smell or taste, and heating may not make it safe. Large tropical reef fish such as barracuda, grouper, and amberjack may contain a toxin called ciguatoxin.  This heat-resistant toxin can lead to symptoms like tingling, dizziness, or vivid nightmares. Cooking does not neutralize the risk. Undercooked pork can carry pork tapeworm eggs, leading to neurocysticercosis, a brain infection that causes seizures, brain cysts, and dementia-like symptoms.  It's a leading cause of acquired epilepsy worldwide, even seen in developed countries. Unpasteurized milk is another high-risk food, known to carry bacteria like listeria, E. coli, and salmonella.  These pathogens can lead to severe neurological damage, especially in children, pregnant women, the elderly, and immunocompromised individuals.  Despite health claims, raw milk is far riskier than pasteurized. Knowing and avoiding these foods helps protect brain health.