Are you really considering eating that?
Neuroscientists are sounding the alarm about five specific foods that could speed up cognitive decline and heighten the risk of developing dementia.
But, here’s the good part: there are some easy swaps you can make to eat better.
“What you eat impacts not just your waistline, but also the future of your brain,” notes Dr. Lamon Velazquez, a consultant in neuroscience and research advisor. He’s a pioneer in brain health and aims to enhance mental performance with universal nootropics.
Research indicates that about 42% of Americans experience dementia after turning 55. Some studies suggest that diets high in sugar and saturated fats can lead to brain inflammation, hurt brain cells, and increase dementia risks.
According to Velazquez, every diet presents an opportunity to either safeguard or harm our neural connections.
“The brain is remarkably resilient yet vulnerable to the usual inflammatory foods typical of Western diets. Unlike other organs, the brain has limited self-repair capabilities after damage,” he explains.
He emphasizes the need to be mindful of brain health at all ages, urging adjustments to what fills our plates.
“The consequences of poor dietary choices accumulate silently over the years. What you eat in your 30s and 40s shapes your brain’s function in your later years,” Velazquez warns.
Besides exercise, rest, and mental engagement, nutrition plays a vital role in maintaining your brain’s health.
So, what’s the worst food for your cognitive well-being?
1. Ultra-processed foods (UPFS)
Ultra-processed foods are loaded with sugars, salt, preservatives, artificial ingredients, and unhealthy fats. While these packaged products are convenient, they can trigger inflammation throughout the body, including the brain.
“Those who consume high quantities of ultra-processed foods show a 28% faster rate of cognitive decline,” explains Velazquez. “These foods provoke an inflammatory response that damages the fragile connections between brain cells.”
It’s believed that over 70% of the food supply in the U.S. falls into this category. Previous studies have linked UPFs to numerous health issues, from cardiovascular disease to obesity and even a heightened risk of early death.
Recent research found that a 10% increase in daily consumption of highly processed foods raises the risk of dementia by 25%.
To combat this, Velazquez recommends choosing fresh, whole, or minimally processed foods.
2. Foods cooked at high heat
Cooking methods like grilling, deep frying, or baking at high temperatures generate compounds known as advanced glycation end products (AGEs).
“AGEs can induce oxidative stress and inflammation in the brain,” says Velazquez. “They’re linked to amyloid plaque formation, which is associated with Alzheimer’s.”
He advises using gentler cooking methods like steaming or poaching instead and suggests marinating food with acidic ingredients, like lemon juice or vinegar, before cooking.
3. Large fish
While fish are generally great sources of omega-3 fatty acids and other nutrients, larger predators—like sharks and swordfish—can contain dangerous mercury levels that build up in the body.
The FDA notes that seafood consumption is the primary way most people in the U.S. are exposed to mercury.
“Mercury can cross the blood-brain barrier and damage nerve tissue, potentially disrupting cellular function and leading to long-term cognitive decline,” Velazquez adds.
He suggests opting for smaller fish such as salmon, trout, or sardines instead.
4. Alcohol
Velazquez cautions that alcohol can be quite detrimental to brain health.
“Long-term, heavy drinking is linked to a decrease in brain volume, particularly in the prefrontal cortex, which is crucial for decision-making and rational thought,” he says.
Alcohol might also pave the way for various diseases, including obesity and neurodegenerative conditions like Alzheimer’s.
Experts agree there’s no safe amount of alcohol to consume.
If you do drink, consider pairing it with food, avoiding sugary mixers, and designating some alcohol-free days to give your brain a break.
5. Artificial sweeteners
While zero-calorie sweeteners are often marketed as healthier alternatives to sugar, research suggests otherwise.
“Some artificial sweeteners may change gut bacteria in ways that promote inflammation,” Velazquez warns. “This inflammation could impact cognitive function and elevate the risk of neurodegenerative diseases.”
Aspertame, a common non-sugar sweetener, has been linked to memory and learning issues. Other studies have shown that long-term use might heighten the risk of stroke, heart disease, and even premature death.
Velazquez recommends swapping out artificial sweeteners for natural sweeteners like honey or maple syrup.
