Registered dietitians recommend adding walnuts, lentils, and apples to your diet for their combination of fiber and low carbohydrate content. These foods deliver sustained energy without blood sugar spikes that refined carbs trigger.
Walnuts pack 2 grams of fiber per ounce alongside healthy fats that support heart health. Lentils contain 8 grams of fiber per cooked cup with 20 grams of protein, making them a complete plant-based option. Apples provide 4 grams of fiber when eaten with the skin intact, plus polyphenols that research links to improved gut health.
The fiber in these foods slows digestion, promoting fullness and reducing overall calorie intake. Unlike low-carb diets that eliminate entire food groups, this approach focuses on carbs that come packaged with nutrients rather than stripping them away.
The American Heart Association recommends 25 grams of fiber daily for women and 38 grams for men. Most Americans consume only half that amount. These three foods offer a practical path to meeting those targets while avoiding processed alternatives marketed as "keto-friendly" or "low-carb" substitutes that often contain artificial ingredients.
Adding these foods requires no special supplements or extreme dietary overhauls. Start by swapping refined grains for lentils and snacking on apples with nut butter instead of processed snacks.