Protein and Weight Loss: The Complete Guide for Canadians

Protein is a key nutrient for losing weight in a healthy way, preserving your muscle and keeping hunger in check. Yet many people don’t eat enough of it, especially while trying to lose weight. This complete guide explains why protein matters, how much you need, and how to fit it easily into your diet.

Why protein is essential for weight loss

Protein plays a unique role in weight loss that carbohydrates and fats can’t fill:

• Greater satiety: Protein keeps you full longer than carbohydrates or fats, which can help reduce your total calorie intake.
• High thermic effect: Your body burns 20 to 30% of protein calories during digestion, compared with only 5 to 10% for carbohydrates.
• Muscle preservation: Without enough protein, a good part of the weight lost while dieting can come from muscle rather than fat.
• Blood sugar stability: Protein slows the absorption of carbohydrates, which helps limit energy spikes and crashes.
• Long-term weight maintenance: A higher protein intake makes it easier to maintain your new weight.

How much protein do you need?

Official Canadian recommendations (0.8 g/kg) are designed to prevent deficiencies, not to optimize health or weight loss. For most active adults looking to lose weight, here are the targets supported by research:

Goal	Recommended intake	Example (75 kg)
Healthy adult, not very active	0.8–1.0 g/kg	60–75 g/day
65 and over	1.0–1.2 g/kg	75–90 g/day
Weight loss	1.2–1.6 g/kg	90–120 g/day
GLP-1 treatment (Ozempic)	1.2–1.6 g/kg	90–120 g/day
Athletes or strength training	1.4–2.0 g/kg	105–150 g/day

To get your own number, use our free protein calculator.

The best sources of protein

Complete animal sources

• Cooked chicken and turkey (skinless): ~30 g of protein per 100 g
• Canned tuna: ~25 g per 100 g
• Cooked salmon: ~25 g per 100 g + omega-3s
• Eggs: ~6 g per egg
• 1% cottage cheese: ~11 g per 100 g
• Plain Greek yogurt: ~10 g per 100 g

Plant sources

• Firm tofu: ~17 g per 100 g
• Cooked lentils: ~9 g per 100 g
• Cooked chickpeas: ~9 g per 100 g
• Cooked edamame: ~11 g per 100 g
• Tempeh: ~19 g per 100 g

Convenient protein supplements

• Protein powder (whey, casein, plant-based): 20–30 g per serving
• Protein bars: 15–25 g per bar
• Shakes and meal replacements: 20–30 g per serving + vitamins and minerals

When should you eat your protein?

How you spread protein over the day matters as much as the total amount. Research suggests aiming for about 25 to 40 g of protein per meal to best support muscle synthesis.

Recommended timing

• Breakfast: Start with protein: eggs, cottage cheese, a protein smoothie
• Before a workout: A light protein snack 1–2 hours before
• After a workout: 25–40 g of protein in the following hours (a meal or a shake)
• Before bed: Casein or Greek yogurt for overnight recovery

Protein and hunger control

Protein acts directly on your hunger hormones. It increases GLP-1 (the same hormone mimicked by Ozempic) and peptide YY, while reducing ghrelin, the hormone that triggers hunger. In practice, a high-protein breakfast can help reduce afternoon cravings.

Does protein make you gain weight?

This is one of the most persistent myths in nutrition. No, protein does not make you gain weight, quite the opposite. It has the highest thermic effect of all macronutrients, promotes satiety, and is the least likely to be stored as fat. Studies suggest that a higher protein intake helps preserve muscle mass during weight loss.

Our recommended protein products

Our clinic has selected convenient protein products to help you reach your target every day. Choose a category:

🚚 Free shipping across Canada on orders of $100 or more

Shop all products

Protein and exercise: a winning combination

Resistance training combined with adequate protein intake is the best strategy for losing fat while preserving, or even building, your muscle mass. This combination also helps maintain your basal metabolism, which makes long-term weight maintenance easier.

FAQ: Protein and weight loss

How many grams of protein per day to lose weight?

For weight loss, aim for 1.2 to 1.6 g of protein per kilogram of body weight. For a 75 kg person, that’s 90 to 120 g of protein per day. Spread it over 3 to 4 meals of about 25 to 40 g each.

Is protein powder good for weight loss?

Yes. Protein powder is a convenient and effective tool for reaching your protein goals without excess calories. Choose powders with few additives, no added sugars, and at least 20–25 g of protein per serving.

Can you eat too much protein?

For a healthy person, the intakes in this guide (up to 2 g/kg) are generally well tolerated. If you have kidney disease or another medical condition, talk to your doctor before increasing your protein.

Which protein snacks should you choose to lose weight?

The best protein snacks for weight loss are: plain Greek yogurt, cottage cheese, protein bars (about 200 calories or less and at least 15 g of protein), hard-boiled eggs, or a small protein shake. Avoid sugary snacks even if they contain protein.

When should you take protein powder to lose weight?

The best time depends on your habits: after a workout for muscle recovery, at breakfast to control hunger all day, or as a snack to avoid cravings. What matters most is reaching your total daily target.