When it comes to weight management and energy levels, your resting metabolic rate (RMR) plays a central role. RMR is the number of calories your body burns while at rest, simply to keep vital functions like breathing, circulation, and cell repair running smoothly. While factors like muscle mass, age, and genetics influence your metabolic rate, diet also matters. Certain foods can support a healthy RMR by providing the nutrients your body needs to efficiently convert food into fuel, maintain lean muscle, and regulate hormones.
According to registered dietitians, the goal is not to "speed up" your metabolism in a dramatic way, but rather to nourish it consistently. Below are four food categories that can help sustain a healthy resting metabolic rate when included as part of a balanced diet.
Protein-Rich Foods
Dietitians consistently point to protein as a key player in metabolic health. Digesting and metabolizing protein requires more energy than digesting carbohydrates or fats—a phenomenon known as the thermic effect of food (TEF). This means your body burns more calories processing protein-rich foods. But beyond that, adequate protein intake helps preserve and build lean muscle mass. Since muscle tissue burns more calories at rest than fat tissue, maintaining muscle is critical for a healthy RMR.
Foods such as eggs, lean poultry, fish, Greek yogurt, and plant-based options like lentils and tofu are excellent sources. Spreading protein intake across meals rather than loading up at one meal may also help maintain steady energy levels and support muscle protein synthesis throughout the day.
A Note on Seafood
Fatty fish like salmon, mackerel, and sardines offer a double benefit: they are high-quality protein sources and also provide omega-3 fatty acids. Some research suggests that omega-3s may support metabolic health by reducing inflammation and improving insulin sensitivity, which can influence how efficiently your body uses energy.
Legumes and Beans
Beans, chickpeas, and lentils are rich in both protein and fiber—a combination that supports metabolic health in several ways. Fiber slows digestion, helping to stabilize blood sugar and prevent the energy crashes that can derail activity levels. This steady energy supply can help you stay active, which supports a higher RMR over time.
"Legumes are underrated for metabolic health," says registered dietitian Samantha Presicci. "Their combination of protein, fiber, and resistant starch may help your body burn slightly more calories after eating while also keeping you satisfied."
Resistant starch, a type of carbohydrate found in beans and lentils, may also encourage the growth of beneficial gut bacteria. A healthy gut microbiome has been linked to improved metabolic regulation.
Green Tea and Unsweetened Beverages
Green tea is one of the most studied beverages in relation to metabolism. It contains catechins—antioxidants that have been shown to modestly increase energy expenditure. The caffeine in green tea also has a mild thermogenic effect. While the increase in calorie burn is not massive, swapping sugary drinks for unsweetened green tea or water can have a compound effect over time by reducing empty calorie intake while providing metabolism-supporting compounds.
Hydration itself is crucial for metabolic function. Even mild dehydration can slow your metabolic rate. Water and unsweetened herbal teas support digestion and cellular function, both of which contribute to an efficient resting metabolism.
Foods Rich in Iron and Zinc
Two minerals that often fly under the radar are iron and zinc, and both are essential for maintaining a healthy metabolism. Iron is necessary for transporting oxygen to your muscles and cells—without adequate iron, your body can't efficiently produce energy. Zinc plays a role in thyroid function, and the thyroid gland regulates metabolic rate. A deficiency in either mineral can slow metabolism over time.
Dietitians recommend incorporating foods like lean red meat, spinach, pumpkin seeds, and shellfish (such as oysters) to meet these nutrient needs. Pairing iron-rich plant foods with vitamin C (for example, adding bell peppers to a spinach salad) can improve absorption.
It is worth repeating that no single food can transform your metabolism overnight. A healthy resting metabolic rate results from consistent dietary patterns, regular physical activity, adequate sleep, and stress management. These four food groups—protein sources, legumes, green tea, and iron- and zinc-rich foods—can be part of a broader approach that supports your body's energy needs.
Before making significant changes to your diet, consider consulting a registered dietitian who can assess your individual needs and health status.
