What foods trigger ketosis?
No single food triggers ketosis by itself; ketosis comes from keeping total carbohydrate low over time. Foods like eggs, fish, meat, avocado, natural oils, cheese and leafy greens support that low-carb state and help you stay in ketosis.
How Food Choices Support Ketosis
It is a common misconception that a specific food flips a switch into ketosis. In reality, ketosis is the result of an overall pattern: consistently low carbohydrate, adequate protein and fat filling the remainder.
Foods that help maintain ketosis
Proteins: eggs, poultry, beef, pork and fish. Natural fats: olive oil, butter, avocado and avocado oil. Low-carb vegetables: leafy greens, broccoli, cauliflower and zucchini. Extras: cheese, nuts and seeds in moderation. These keep carbohydrate low while covering your energy and protein needs.
Why the pattern matters more than any item
Even keto-friendly foods will not sustain ketosis if your overall carbohydrate creeps up elsewhere. The reliable approach is hitting a low daily carb target, and you can estimate your carb, protein and fat targets to build meals around them.
What about MCT oil and similar?
Some fats, like MCT oil, are marketed as raising ketones, and they can nudge ketone levels. But they do not override a high-carb diet; the foundation is still low overall carbohydrate.
Bottom line
Choose low-carb whole foods consistently and ketosis follows; chase a single "magic" food and it will not. For related questions on staying in ketosis, you can read the keto FAQ.