Macronutrients: Fueling Your Body for Optimal Health

What Are Macronutrients?

Macronutrients are the essential components of our diet that provide the body with energy and support various bodily functions. There are three primary macronutrients: carbohydrates, proteins, and fats, each playing a unique role in influencing our energy levels. Additionally, water is considered a macronutrient, although it does not provide any energy (calories) like the others.


Role: Carbohydrates are the body’s primary source of energy. They are broken down into glucose, which is used for immediate energy or stored as glycogen in muscles and the liver for future use.

Effect on Energy Levels: Consuming carbohydrates provides a quick and readily available source of energy. A lack of carbohydrates in the diet can lead to fatigue and low energy levels, as the body struggles to maintain its energy needs.


Role: Proteins are essential for building and repairing tissues, enzymes, and various hormones. While not primarily an energy source, they can contribute to energy production when needed. During rest, protein only accounts for 15% of energy expenditure, dropping to about 5% during exercise.

Effect on Energy Levels: A balanced intake of protein helps maintain muscle mass and supports overall bodily functions. Inadequate protein consumption can lead to muscle weakness and fatigue, potentially affecting energy levels.


Role: Dietary fats are crucial for the absorption of fat-soluble vitamins (A, D, E, and K) and play a role in providing long-term energy storage.

Effect on Energy Levels: Fats provide a slow, sustained release of energy, making them important for activities that require endurance. A diet too low in fats can lead to feelings of fatigue and low energy, as the body may struggle to meet its energy demands.

Balancing these macronutrients in your diet is essential for maintaining optimal energy levels. The ideal macronutrient ratio varies from person to person based on factors like age, activity level, and health goals. A well-rounded diet that includes a mix of carbohydrates, proteins, and healthy fats can help you maintain steady energy levels throughout the day. Consulting a healthcare professional or nutritionist can provide personalized guidance on macronutrient intake to meet your specific needs and goals.

Recommendations for Macronutrients:

Carbohydrates: Differentiate between “good carbs” and “bad carbs.” Good carbs come from products such as whole grains and legumes, while bad carbs derive from excessive sugar consumption. The World Health Organization recommends consuming less than 25 grams of added sugar per day. Those values of sugar intake are very hard for someone to accomplish however. Look at a can of coke for instance which has 156% of the daily sugar consumption recommendations. Even juices that some would expect to be much healthier such as apple juice contains a high amount of sugar. A minute maid apple juice box (177ml) contains 19g of sugar.nutrition

Fats: Pay attention to the type and quality of fats in your diet, as they are crucial for cardiovascular health. Avoid saturated and trans fats commonly found in products like cheese and processed foods. Instead, opt for unsaturated fats found in foods like vegetable oils, avocados, nuts, and fish. Essential fatty acids omega-3 and omega-6, found in fish, can also be taken as supplements to help reduce bad cholesterol levels.

Protein: There is no inherently “bad protein,” but consider the sources of protein that come with highly processed carbs and fats. Protein can be found in a variety of foods, including meats, legumes, dairy, and tofu.

Portions Sizes For Macronutrients:

  • Carbohydrates: 1 gram of carbohydrates equals 4 calories. Aim for 45-65% of your daily calories to come from carbohydrates.
  • Fats: 1 gram of fats equals 9 calories. Aim for 20-35% of your daily calories to come from fats.
  • Protein: 1 gram of protein equals 4 calories. Aim for 10-35% of your daily calories to come from protein.

Recommended Protein Intake:

  • For strength athletes: 1.6-1.7g/kg/day.
  • For endurance athletes: 1.2-1.6g/kg/day.

Key Takeaways:

Balancing your intake of these macronutrients is essential for maintaining good health and proper bodily function. It is crucial to consume a rich diet with a wide variety of vegetables, fruits, whole grains, and high-fiber foods. The specific ratio of macronutrients that a person needs can vary depending on factors such as age, sex, activity level, and individual health goals. For personalized guidance, consult a physician or nutritionist. You can also use the helpful tool at MyPlate.gov for more specific information tailored to your needs.


If you have any questions or comments, feel free to reach out to us at luke@north49therapy.ca