A common worry about keto is that it means no vegetables and no fibre. It does not. It means choosing the vegetables that grow above ground over the starchy ones that grow below, and once you know the rough map you can fill half your plate without a second thought.
The ones to lean on
Anything leafy and green is essentially free: spinach, lettuce, rocket, kale, chard. Then the cruciferous family, which does a lot of work on keto: broccoli, cauliflower, cabbage, Brussels sprouts. Cauliflower in particular stands in for rice, mash and even pizza base. Courgette, asparagus, green beans, mushrooms, peppers, celery, cucumber and avocado all sit comfortably within a keto day. As a rule of thumb, vegetables that are watery, leafy or grow above the soil are low in carbohydrate.
The ones to watch
The starchy roots are where the carbs hide. Potatoes are out, as are sweet potatoes, parsnips and most winter squash beyond a small portion. Carrots and beetroot are higher than people expect and are best treated as a garnish rather than a serving. Sweetcorn and peas are really starches in disguise. None of these is forbidden in a single bite, but a normal portion will use up your whole carb budget on its own.
Why fibre still matters
Cutting carbohydrate does not remove your need for fibre. It keeps digestion moving, feeds the bacteria in your gut, and helps you feel full. The good news is that low-carb vegetables, along with avocado, nuts, seeds and flax, are exactly where fibre comes from, and because fibre is subtracted to give net carbs, eating plenty of greens barely touches your limit. People who get constipated on keto are almost always short on vegetables, water or salt rather than suffering some inevitable side effect.
Filling the plate
A reliable plate is a sensible portion of protein, a generous pile of green vegetables cooked in butter or olive oil, and enough added fat to round it out. The vegetables bring volume, colour, fibre and micronutrients for very few carbs, which keeps meals satisfying and stops keto becoming the joyless meat-and-cheese caricature people imagine. For where to buy the good stuff around town, the keto supermarket guide is a useful companion.
A note on portions
Even friendly vegetables add up if you eat enough of them, so if you are aiming for twenty grams of net carbs a day, it is worth checking the figures for a week until you have a feel for it. After that the map becomes instinct, and you stop needing to count the broccoli.
This is general information about the ketogenic diet, not medical advice. Keto does not suit everyone; if you are pregnant, on medication, or managing a condition such as diabetes, speak to a doctor or dietitian first.