7 Foods Nutritionists Say Americans Are Missing Out On Right Now

The American diet is full of food. It is also, according to most nutrition research published in the past decade, missing quite a few of the specific things the body actually needs most.

These are the foods that keep coming up when researchers and registered dietitians are asked what they wish people would add to their plates.

Sardines

The average American gets a fraction of the omega-3 fatty acids their body needs every day. A single can of sardines provides eight times more EPA and DHA than most Americans consume in an entire twenty-four hours.

A Harvard study found that eating sardines just once or twice a week can cut heart disease risk by more than a third. They are also one of the lowest-mercury seafood options available and one of the cheapest proteins in any grocery store.

Beans and Lentils

The recommendation from nutrition advisory committees at the federal level is increasingly clear: eat more beans, peas, and lentils and less red meat. The evidence linking legumes to longevity is among the most consistent in nutrition science.

Americans eat roughly a quarter of the recommended daily amount. Blue Zones research finds that people who eat a full cup of beans daily live measurably longer than those who do not.

Fermented Foods

Gut health is one of the fastest-growing areas of nutrition research, and the consensus is pointing in one direction. Fermented foods like yogurt and kefir ranked as the top superfoods of 2025 in a survey of nearly 900 registered dietitian nutritionists.

They support a diverse microbiome, improve digestion, reduce inflammation, and have been linked to lower cholesterol and better blood pressure control over time.

Walnuts

Nutritionists call walnuts a hidden gem that most people reach right past. They are the only common nut that contains significant amounts of ALA, the plant-based form of omega-3 fatty acids, making them especially valuable for anyone not eating fish regularly.

They reduce visceral fat, improve insulin sensitivity, and can be added to almost any meal without effort or expense.

Dark Leafy Greens

Kale, spinach, Swiss chard, and collard greens are packed with folate, calcium, iron, magnesium, and fiber, and research consistently links them to reduced risk of heart disease and type 2 diabetes. The catch is that almost nobody actually eats enough of them.

Less than ten percent of American adults meet the CDC’s basic daily vegetable intake recommendations, making leafy greens one of the most common nutritional gaps in the country.

Berries

Blueberries, blackberries, raspberries, and strawberries are nutritional powerhouses loaded with vitamins, fiber, and antioxidants whose strength is associated with reduced risk of heart disease, cancer, and chronic inflammation. They are also among the lower-sugar fruit options available.

Dietitians recommend rotating between different varieties because each delivers a slightly different set of antioxidant compounds.

Seeds

Chia, hemp, and flaxseeds are daily favorites for nutritionists and among the most ignored foods in any grocery store. A tablespoon or two delivers omega-3 fatty acids, protein, and fiber in a package that disappears into a smoothie, oatmeal, or salad without changing anything about the taste.

Pumpkin seeds are a separate standout, providing exceptional magnesium and zinc in doses that most Americans are chronically running short on.

None of these seven foods require a new diet plan or a significant lifestyle overhaul. They are widely available, most of them are inexpensive, and all of them appear on the lists of the researchers and registered dietitians who spend their careers studying what the body actually needs most.

The gap between what Americans are eating and what they are missing is smaller than most people think, and any one of these foods is a good place to start closing it.