- Keto limits carbs (often under about 50 g a day) so the body burns more fat and produces ketones.
- Fast early weight loss is mostly water; long-term results are similar to other diets with matched calories.
- LDL cholesterol rises significantly in some people, so get a lipid panel.
- People on diabetes medications, especially SGLT2 inhibitors, must talk to their doctor first.
The ketogenic diet remains popular in Canada for weight loss and blood sugar control. It works for some people, and it has specific risks. This guide covers the evidence and how to do it well.
What keto is
A ketogenic diet is very low in carbohydrate, moderate in protein and high in fat. With carbs restricted, the liver produces ketones from fat, which become a major fuel.
What research shows
- Early weight loss is rapid, largely water and glycogen
- Over 6 to 12 months, weight loss is similar to other diets when calories are comparable
- Appetite: many people find keto filling, which helps them eat less
- Blood sugar: often improves in type 2 diabetes, under medical supervision
Risks and cautions
- LDL cholesterol can rise substantially in some people; check lipids after a few months
- Diabetes medications: insulin and sulfonylureas can cause low blood sugar; SGLT2 inhibitors carry a risk of ketoacidosis on very low-carb diets. Diabetes Canada advises talking to your healthcare team before starting
- “Keto flu” in the first week: headache, fatigue; extra salt and fluids help
- Low fibre unless you eat plenty of vegetables, nuts and seeds
- Training: high-intensity performance may drop
Building keto meals from Canadian groceries
| Meal | Example |
|---|---|
| Breakfast | Eggs, spinach and cheese, coffee |
| Lunch | Salmon salad with leafy greens, avocado and canola or olive oil dressing |
| Dinner | Chicken thighs, roasted cauliflower and broccoli |
| Snacks | Greek yogurt (plain), nuts, cheese, hemp hearts |
Favour unsaturated fats (canola and olive oil, nuts, fish) over lots of butter and processed meats to limit LDL rises.
Is it right for you?
Keto suits people who enjoy those foods and find it easy to stick with. If you miss bread, fruit and grains, a moderate-carb, high-protein approach will work just as well. See our macro guide and weight loss myths.
Frequently asked questions
Is keto better for weight loss?
Long-term results are similar to other diets with matched calories; it suits people who find it easy to follow.
Does keto raise cholesterol?
LDL rises significantly in some people. Get a lipid panel after a few months.
Is keto safe with diabetes?
Only with your healthcare team’s guidance, especially if you take insulin, sulfonylureas or SGLT2 inhibitors.
How many carbs on keto?
Commonly under about 50 g a day, sometimes lower.
This article is general information for adults in Canada, not medical advice. Talk to a doctor or pharmacist before using any prescription drug, anabolic steroid or research compound, and get bloodwork done. If you’re in crisis, call or text 9-8-8 (Suicide Crisis Helpline) any time.
