Macronutrients are the three nutrients your body needs in large amounts for energy and structure: protein, carbohydrates and fat. Health Canada’s reference ranges suggest adults get about 45–65% of their energy from carbohydrates, 20–35% from fat and 10–35% from protein, which leaves plenty of room for personal preference. For most people, the quality of the foods matters more than hitting exact percentages.
Macronutrients at a glance
| Macronutrient | Main jobs | Energy per gram | Healthy sources |
|---|---|---|---|
| Protein | Builds and repairs muscle, skin, enzymes and hormones; supports immunity; helps you feel full | About 4 calories | Beans, lentils, tofu, eggs, fish, poultry, lean meats, yogurt, milk, nuts, seeds |
| Carbohydrates | The body’s preferred fuel, especially for the brain and muscles; fibre supports digestion | About 4 calories | Whole grains, vegetables, fruit, legumes, milk and yogurt |
| Fat | Stores energy; builds cell membranes; helps absorb vitamins A, D, E and K | About 9 calories | Canola and olive oil, nuts, seeds, avocado, fatty fish |
Micronutrients (vitamins and minerals) are needed in much smaller amounts and don’t provide calories, but they come packaged with the same foods. Choosing whole, minimally processed sources of each macronutrient gives you both.
Protein
What it does
Protein is made of amino acids, the building blocks your body uses for muscle, organs, skin, hair, enzymes and antibodies. It is also the most filling macronutrient for many people, which can help with appetite when you are working toward a healthy weight.
How much you need
Health Canada’s Dietary Reference Intakes set the recommended intake for adults at 0.80 grams of protein per kilogram of body weight per day. For a person weighing 70 kg, that’s about 56 grams. Needs can be higher during pregnancy and breastfeeding, and for some older adults and very active people, so check with a professional if any of these apply.
Best sources
Canada’s Food Guide encourages choosing protein foods from plants more often, since they can provide more fibre and less saturated fat, which benefits heart health. It also notes you don’t need large amounts of protein foods. Spreading protein across meals, for example eggs or yogurt at breakfast, beans at lunch and fish at dinner, is a practical approach. Our protein intake guide goes deeper.
Carbohydrates
What they do
Carbohydrates break down into glucose, which fuels your brain, muscles and daily activity. Health Canada’s reference values set a recommended minimum of 130 grams of carbohydrate per day for adults, mainly to supply the brain.
Types of carbohydrates
- Sugars: found naturally in fruit and milk, and added to foods like pop, candy, baked goods and many sauces.
- Starches: found in grains, potatoes, corn and legumes.
- Fibre: the part of plant foods your body can’t digest. It supports regular bowel movements, feeds gut bacteria and helps keep you full. Health Canada’s adequate intake is 38 grams a day for men and 25 grams a day for women aged 19 to 50.
Best sources
Canada’s Food Guide notes that whole grain foods have more fibre than refined grains, and that eating foods higher in fibre can help lower the risk of stroke, colon cancer, heart disease and type 2 diabetes. Good everyday choices include oats, brown or wild rice, quinoa, whole-grain bread and pasta, beans, lentils, vegetables and whole fruit. The carbohydrates worth limiting are added sugars and highly refined products; our article on sugar’s effects explains why.
Fat
What it does
Dietary fat provides long-lasting energy, forms part of every cell, helps make hormones and lets your body absorb fat-soluble vitamins. Two fats, linoleic acid (omega-6) and alpha-linolenic acid (omega-3), are essential, meaning you must get them from food.
Types of fat
- Unsaturated fats (mostly liquid at room temperature): canola and olive oil, nuts, seeds, avocado and fatty fish. These are the ones to choose most often.
- Saturated fats: found in higher amounts in fatty meats, butter, cheese, cream and many baked goods. Health Canada advises keeping these as low as possible within a nutritious diet.
- Trans fats: also to be kept as low as possible.
Putting the ranges into practice
Here are Health Canada’s Acceptable Macronutrient Distribution Ranges for adults 19 and older:
| Macronutrient | Share of daily energy |
|---|---|
| Carbohydrate | 45–65% |
| Fat | 20–35% |
| Protein | 10–35% |
These ranges are wide on purpose. People eat in many healthy ways, and needs change with age, activity, health conditions and goals. You don’t need to count grams to eat well. A simpler method is the plate:
- Half the plate: vegetables and fruit (mostly carbohydrates and fibre)
- A quarter: protein foods
- A quarter: whole grains
- Plus: a small amount of healthy fat from cooking oil, nuts, seeds or avocado, and water to drink
Planning a few meals this way each week is easier with our meal planning guide.
Macronutrients and weight
Body weight is influenced by total energy intake and use over time, along with sleep, stress, hormones, medications and genetics. No single macronutrient causes weight gain on its own. A few patterns tend to help with appetite and steady energy:
- Include some protein at each meal and snack.
- Choose high-fibre carbohydrates over refined ones.
- Be mindful of portions of fats and oils, which are energy-dense.
- Limit sugary drinks; choose water, sparkling water or milk instead.
Common myths
- “Carbs make you gain weight.” Whole-grain, high-fibre carbohydrates are part of a healthy pattern. Large amounts of added sugars and refined products are a different story.
- “Fat is bad for you.” Unsaturated fats are essential and support heart health. The type of fat matters more than avoiding fat altogether.
- “More protein is always better.” Once your needs are met, extra protein is simply extra energy, and very high-protein eating can crowd out fibre-rich foods.
When to check with a professional
Talk to your doctor or a registered dietitian before making big changes to your macronutrient balance if you:
- have diabetes, kidney disease, heart disease or another chronic condition
- are pregnant or breastfeeding
- are an athlete or training heavily
- are considering a very low-carbohydrate, very high-protein or very low-fat diet
- find that tracking food is causing stress, guilt or obsessive thoughts (support is also available through NEDIC)
Key takeaways
- Protein, carbohydrates and fat each have essential jobs; you need all three.
- Adult ranges are wide: 45–65% carbohydrate, 20–35% fat, 10–35% protein.
- Choose plant proteins more often, whole grains over refined, and unsaturated fats over saturated.
- Use the plate method instead of counting grams.
- Food quality matters more than exact percentages.
FAQ
Can I eat too much of one macronutrient?
Yes. Very high intakes of any one macronutrient usually crowd out others and the nutrients that come with them. Staying within the ranges and eating a variety of foods keeps things balanced.
Do I need to track macros?
Most people don’t. Building balanced plates gives you a healthy mix without the numbers.