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February 15, 2024 7 min read

The significance of nutrition cannot be overstated in the realm of fitness and well-being. The choice of foods for people who are committed to their fitness journey goes beyond mere nourishment; it becomes a tactical one to fuel workouts, ease recovery, achieve peak performance, and maintain a healthy body weight.

Among the many things to consider when choosing a diet, one thing is often the most important: feeling full. Certain foods keep fitness enthusiasts feeling fuller for longer, which makes them feel satisfied and helps them control their caloric intake. In this article, we look at a selection of nutrient-dense foods that match fitness goals and help you feel full for a long time. We’ll explore foods that score high on the satiety index.

What is the Satiety Index?

Satiety Index

Satiety refers to the feeling of fullness and satisfaction that you feel after eating. It is the signal that tells your body and brain that you have consumed enough food, and it plays a crucial role in regulating appetite and preventing overeating. Several factors influence satiety, including the nutrient composition of the meal, the volume of food consumed, and individual factors such as hormones and metabolism.

The Satiety Index is a measure of how well different foods satisfy hunger and keep individuals feeling full after eating. It was developed as a way to quantify and compare the satiating effects of various foods. The index was created by Dr. Susanne Holt and her colleagues at the University of Sydney.

The scientific understanding of the relationship between dietary intake and health has evolved over the years. The USDA’s food composition data resources have an integrated data system that provides expanded nutrient profile data to answer your questions about any food item.

What Makes Food Filling?

Several factors contribute to the feeling of fullness or satiety after eating. Here are some key aspects that make food filling, and keep you full for longer.

When choosing what to eat, focus on foods that will provide the following:

1. Nutrient Density

Nutrient density

Nutrient-dense foods are often associated with high satiety index scores. Nutrient density refers to the amount of essential macronutrients and micronutrients per calorie in food.

Nutrient-dense foods provide a higher concentration of essential nutrients relative to their calorie content.

Macronutrients are the nutrients we need in larger quantities that provide us with energy: in other words, healthy fats like omega-3 fatty acids, protein (including essential amino acids), and carbohydrates. Micronutrients are mostly vitamins and minerals and are equally important but consumed in very small amounts.

Often, nutrient-dense foods, such as fruits, veggies, lean proteins, and whole grains, are also high in fiber and water content, which contribute to a sense of fullness and satiety.

2. Satiety Hormones

Satiety Hormones

Choose foods that trigger the release of hormones that signal hunger and fullness to your brain.

For example:

— Eating protein decreases the release of Ghrelin, the hunger hormone, while increasing peptide YY and glucagon-like peptide-1, promoting a feeling of fullness.

— Fiber can trigger the release of hormones that signal fullness, such as cholecystokinin (CCK) and glucagon-like peptide-1 (GLP-1). These hormones send signals to your brain that you're satisfied and reduce the appetite.

— Healthy fats trigger the release of cholecystokinin (CCK), peptide YY (PYY), and leptin that signal hunger or satiety to your brain.

3. Slower Digestion

Certain foods slow down the digestion process. It takes longer for your body to break down and absorb nutrients, which means the release of glucose into the bloodstream is steadier. This can help regulate blood sugar levels and prevent rapid spikes and crashes, reducing feelings of hunger.

4. Stabilize Blood Sugar

Eat foods that help stabilize blood sugar levels by slowing down the absorption of glucose from the digestive tract. This can prevent rapid increases and subsequent drops in blood sugar that can trigger hunger.

5. Increased Chewing Time

Foods that require more chewing can slow down the eating process. This can give your body more time to recognize signals of fullness and reduce the likelihood of overeating. Furthermore, it can contribute to a feeling of fullness through increased oral exposure and the release of saliva, initiating the digestive process.

6. Thermic Effect of Food (TEF)

The body expends energy to digest, absorb, and process nutrients from food, known as the thermic effect of food. This means more calories are burned in the digestion process, contributing to a feeling of fullness.

Foods in this category include lean meats (chicken, turkey, lean beef), fish and seafood, eggs, legumes (beans, lentils), Greek yogurt, fibrous vegetables, and whole grains.

Most Filling Foods

Along with the health benefits and satiety aspects mentioned above, the following food types are recommended for their additional unique characteristics that make them filling foods that will keep you going until it’s time for your next meal:

1. Protein


Protein-rich foods can help keep you fuller for longer. Proteins take longer to digest compared to carbohydrates, and they have a greater impact on satiety. Common sources of protein include:

— Lean meats (chicken, turkey, fish)

— Eggs

— Greek yogurt

— Cottage cheese

— Legumes (beans, lentils)

— Tofu and other soy products

Do not overlook the value of protein supplements like plant-based and whey protein powders and Smokehouse Brisket Beef Jerky to keep you full for longer.

2. High Fiber

Fiber-rich foods

— Adds Bulk: Dietary fiber adds bulk to your diet without adding many calories. Since it doesn't get fully digested or absorbed, it takes up space in your stomach, contributing to a feeling of fullness— even with a small serving size. High Fiber foods form an essential part of weight loss diets. 

Foods that generate strong satiety sensations have obvious benefits for weight management.

— Water Absorption: Soluble fiber, found in foods like oats and legumes, can absorb water and form a gel-like substance in the digestive tract. This can contribute to a sense of fullness by increasing the volume of the stomach contents.

High-Fiber Food Examples:

— Whole grains (such as oats, quinoa, and brown rice)

— Fruits (especially those with skin or seeds)

— Vegetables (such as leafy greens, broccoli, and carrots)

— Nuts and seeds (like almonds and chia seeds)

— Legumes (such as chickpeas, lentils, and various beans)

3. Low-Energy-Density Foods

Low-energy-density foods

Low-energy-density foods are those that have fewer calories per gram of weight due to their high water content and high fiber content.

Water adds bulk to the food without contributing additional calories. The volume occupied by low-energy-density foods in the stomach can induce feelings of fullness, even though it is a low-calorie food intake.

Low-energy-density foods generally have a lower caloric density, meaning they provide fewer calories in a given volume. This allows individuals to eat a larger portion size for the same calorie intake, contributing to a greater feeling of fullness.

Low-Energy-Density Food Examples:

— Whole grains (e.g., quinoa and brown rice)

— Fresh fruits (such as berries, melons, watermelon, and cucumbers)

— Vegetables (like leafy greens and broccoli)

— Nuts and seeds (e.g., almonds and chia seeds)

— Certain soups and stews that are broth-based and contain various vegetables are good sources of low-energy-density foods.

4. Complex Carbohydrates

Complex Carbohydrates

Complex carbohydrates offer a higher level of satiety per calorie compared to simple carbs. This means that, for a similar calorie intake, a meal rich in complex carbohydrates may provide a greater feeling of fullness and less risk of cravings for added sugars compared to a meal primarily composed of simple sugars.

Complex Carbohydrate Examples:

— Whole grains (e.g., oats, barley, and whole wheat)

— Legumes (such as lentils and chickpeas)

— Potatoes, sweet potatoes

— Leafy greens

— Brown rice

— Quinoa

5. Healthy Fats

Healthy Fats

Healthy fats, including saturated and unsaturated fats, contribute to the flavor and palatability of foods, making them more satisfying to eat. This sensory satisfaction can contribute to a sense of fullness, reducing the likelihood of overeating or feeling hungry soon after a meal.

Healthy Fats Examples:

— Avocados

— Nuts and seeds

— Olive oil

— Fatty fish (such as salmon and mackerel)

6. Dairy

Greek Yogurt and Cottage Cheese

Of all dairy products, Greek yogurt and cottage cheese are the healthiest and are known to keep you fuller for longer.

— Protein Content: Both Greek yogurt and cottage cheese are rich in protein. Cottage cheese, in particular, contains a type of protein called casein, which is digested more slowly than whey protein found in other dairy products. This slow digestion contributes to a sustained release of amino acids into the bloodstream, keeping you feeling satisfied for an extended period.

— Healthy Fats: Greek yogurt and cottage cheese also contain some healthy fats.

— Texture and Volume: The thick and creamy texture of Greek yogurt and the curd-like consistency of cottage cheese can contribute to a greater sense of fullness.

— Nutrient Density: Both Greek yogurt and cottage cheese are nutrient-dense, meaning they provide a good amount of essential nutrients like calcium, phosphorus, and vitamins.

Dairy Product Examples:

— Greek yogurt

— Cottage cheese

— Other Cheese (in moderation)

It's important to note that the combination of these factors varies from person to person, and what works for one individual may not be the same for another. Individual preferences, dietary restrictions like high-protein or low-fat choices, and fitness goals vary.

Consulting a registered dietitian or nutritionist is always a good way to get started on a healthy diet. A well-balanced diet that includes various nutrient-dense foods from different food groups is generally recommended for overall health and fitness. Additionally, staying hydrated and considering portion sizes are essential factors in supporting fitness goals.


As fitness enthusiasts pursue their goals with dedication and discipline, the role of nutrition emerges as a cornerstone in their journey toward well-being. The foods we choose have the power not only to fuel our bodies, but also to shape our overall satisfaction and success.

In the pursuit of fitness, it becomes evident that the integration of nutrient-dense, satiating foods is a key strategy. From lean proteins and fiber-rich fruits to wholesome grains and hydrating vegetables, the array of choices is diverse and exciting.

By incorporating these foods into their dietary repertoire, fitness enthusiasts can achieve satiety and lay the foundation for sustained energy, improved recovery, and long-term health. The fitness journey is not just about physical exertion; it is a holistic endeavor, and the foods we consume play an instrumental role in sculpting a healthier, more resilient version of ourselves.