The Complete UK Keto Food List

The ketogenic diet is a high-fat, moderate-protein, very-low-carbohydrate eating pattern that shifts your body’s fuel source from glucose to fat. Building a sustainable keto life in the UK means knowing which foods to prioritise, where to find them, and how to track their macronutrient content. This guide covers the foods that work, the ones to avoid, and practical UK sourcing.

Proteins: The Foundation

Protein on keto serves two purposes: it preserves muscle mass during weight loss and provides satiety without excessive calories. Unlike low-fat diets, keto doesn’t restrict fat in protein sources—it embraces it.

Meat and poultry form the backbone. Beef, pork, lamb, and chicken are all keto-friendly. Fattier cuts—beef brisket, pork belly, lamb shoulder—are preferable to lean cuts because they contain more calories from fat and fewer carbohydrates per gram. At Tesco, a 500 g pack of beef mince (20% fat) costs around £3.50 and contains roughly 0 g carbohydrate per 100 g serving.

Fish and seafood are equally valuable. Salmon, mackerel, trout, and sardines are rich in omega-3 fats and negligible carbohydrate. Prawns and white fish like cod are lower in fat but still acceptable. Canned fish in oil (not brine) is a convenient, shelf-stable option.

Eggs are the keto workhorse: one large egg contains 6 g protein, 5 g fat, and 0.4 g carbohydrate. They’re inexpensive, versatile, and widely available.

Processed meats (bacon, sausages, ham) are fine if you check the label for added sugar. Many UK brands add 1–2 g carbohydrate per serving. Avoid those with more than 2 g per 100 g.

Fats: The Fuel

Fat is not a side dish on keto—it’s the primary energy source. The goal is roughly 70–75% of calories from fat.

Butter and ghee are staples. Unsalted butter from Sainsbury’s or Waitrose is pure fat (0 g carbohydrate). Ghee is clarified butter with milk solids removed, making it shelf-stable and suitable for higher-heat cooking.

Oils include olive oil (cold salads), avocado oil (cooking), and coconut oil (baking). All are zero carbohydrate. Avoid seed oils high in omega-6 linoleic acid (sunflower, vegetable oil blends).

Nuts and seeds are calorie-dense but carb-conscious choices. Macadamia nuts (12 g fat, 2 g net carbohydrate per 28 g) and pecans (20 g fat, 1 g net carbohydrate per 28 g) are ideal. Almonds (14 g fat, 3 g net carbohydrate per 28 g) are acceptable in moderation. Pumpkin seeds and sunflower seeds are higher in carbohydrate—measure carefully. Peanuts are technically legumes and slightly higher in carbohydrate (7 g per 28 g); use sparingly.

Avocados are a keto favourite: one medium avocado contains 21 g fat, 12 g fibre, and only 3 g net carbohydrate. At Tesco, a ripe avocado costs £0.80–£1.20.

Cheese varies by type. Cheddar, Stilton, Brie, and Camembert are nearly zero carbohydrate (0.1–0.7 g per 28 g). Cottage cheese and ricotta are higher (1–3 g per 100 g) and should be measured. Cream cheese is 0.4 g carbohydrate per 28 g.

Cream (double, single, and soured) is keto-friendly. Double cream at Sainsbury’s (£1.50 for 284 ml) contains 0.3 g carbohydrate per 100 ml.

Vegetables: The Carb Budget

Not all vegetables are equal on keto. The rule is simple: eat above ground, measure below ground.

Above-ground vegetables (leafy greens, cruciferous) are low-carb and can be eaten freely within reason. Spinach, lettuce, kale, broccoli, cauliflower, courgette, and peppers are all acceptable. A 100 g serving of raw spinach contains 1 g net carbohydrate. Cauliflower rice (available at Tesco, Asda, and Lidl) is a grain substitute: 100 g contains 2 g net carbohydrate.

Below-ground vegetables (roots, tubers) are high in starch and should be avoided or severely restricted. Potatoes, parsnips, carrots, and beetroot exceed daily carbohydrate allowances quickly. A medium potato contains 17 g net carbohydrate—often half or more of a day’s budget.

Tomatoes are technically fruit and contain 3 g net carbohydrate per 100 g. Small amounts in sauces or salads are fine; frequent consumption adds up.

Mushrooms are low-carb fungi: 100 g of button mushrooms contains 1 g net carbohydrate.

Dairy and Alternatives

Full-fat dairy is keto. Low-fat or “light” versions contain added sugar to compensate for flavour loss—avoid them.

Yoghurt must be full-fat and unsweetened. Greek yoghurt (10% fat) contains 3–4 g carbohydrate per 100 g; flavoured versions contain 10–15 g. Coconut yoghurt is a lower-carb alternative (2 g per 100 g).

Milk is too high in lactose (5 g per 100 ml) for most keto plans. Almond milk (unsweetened) contains 0.3 g per 100 ml and is widely available at UK supermarkets.

Fruits: The Exception

Most fruits are too high in sugar for regular consumption. Exceptions exist.

Berries are the only fruits routinely included. Raspberries (5 g net carbohydrate per 100 g), blackberries (5 g), and strawberries (7 g) are manageable in small portions. Blueberries (12 g) and grapes (17 g) are higher and should be rare treats. Bananas (21 g per 100 g) and dried fruits are off-limits.

Avocados (technically fruit) are discussed above.

Condiments and Flavourings

Many condiments hide carbohydrate. Read labels.

Soy sauce (tamari, coconut aminos) contains 1–2 g carbohydrate per tablespoon. Vinegars (apple cider, balsamic, white) are mostly zero carbohydrate. Mustard is negligible (0.3 g per tablespoon). Mayonnaise (full-fat, no added sugar) is zero carbohydrate. Ketchup and barbecue sauce are high in sugar—avoid. Hot sauce varies; check the label (most are 0–1 g per tablespoon).

Salt and spices are zero carbohydrate. Garlic powder, onion powder, and herbs are fine. Fresh garlic and onion are low-carb in small quantities (1 clove garlic = 1 g carbohydrate; 1 tablespoon onion = 1.5 g).

What to Avoid

Grains and grain products: bread, pasta, rice, oats, cereals, flour. All exceed carbohydrate limits rapidly.

Sugar and sweetened foods: biscuits, cakes, chocolate, sweets, fizzy drinks, fruit juice. Even “diet” versions often contain sugar alcohols that affect blood glucose in some people.

Starchy vegetables: potatoes, corn, peas, parsnips.

Most fruits: bananas, grapes, mangoes, dried fruit.

Low-fat or “light” products: these contain added sugar and are counterproductive.

Alcohol: beer and sweet wines are high in carbohydrate. Dry wine (3–4 g per 175 ml glass) and spirits (0 g) are lower-carb choices.

What This Means in Practice

A typical UK keto day might look like this:

Breakfast: Two eggs fried in butter with 50 g cheddar cheese and a handful of spinach. Macros: 18 g protein, 24 g fat, 1 g net carbohydrate.

Lunch: 150 g grilled salmon with 100 g roasted broccoli in olive oil. Macros: 30 g protein, 18 g fat, 4 g net carbohydrate.

Dinner: 200 g beef mince (20% fat) in a tomato and cream sauce with courgette noodles. Macros: 35 g protein, 22 g fat, 5 g net carbohydrate.

Snack (optional): 30 g macadamia nuts. Macros: 2 g protein, 21 g fat, 2 g net carbohydrate.

Daily total: approximately 85 g protein, 85 g fat, 12 g net carbohydrate. At 1,800 calories, this is roughly 47% fat, 19% protein, and 3% carbohydrate—within ketogenic ranges.

Research shows that carbohydrate restriction improves metabolic markers independent of weight loss. A 2019 study found that people following a ketogenic approach experienced improvements in insulin resistance and blood pressure within weeks, even without significant weight reduction. This metabolic shift is why food selection matters: the foods listed above support ketosis, whilst those to avoid interrupt it.

For those managing type 2 diabetes, the evidence is particularly strong. A landmark 2018 study tracked people using a ketogenic approach combined with remote support and found that after one year, over 60% achieved remission of their condition (defined as HbA1c below 5.7% without medication). This wasn’t achieved through weight loss alone; the carbohydrate restriction itself altered glucose metabolism.

Tracking macros is essential, especially in the first 4–8 weeks. Knowing that 100 g of salmon contains 25 g protein and 13 g fat (but 0 g carbohydrate) allows you to build meals that stay within your targets. net carbohydrate calculation (total carbohydrate minus fibre) is the metric that matters; fibre doesn’t raise blood glucose and is subtracted from the total.

UK supermarkets now stock keto-friendly alternatives: cauliflower rice at Asda (£1.20 per 280 g bag), courgette noodles at Waitrose (£2.50 per 280 g pack), and almond flour at Tesco (£3.80 per 500 g). These aren’t essential, but they ease the transition if you’re accustomed to grain-based meals.

Frequently Asked Questions

Q: Can I eat unlimited fat on keto?

A: No. Whilst fat is the primary fuel, calories still matter for weight loss. Aim for 70–75% of calories from fat, but track total intake. A typical target is 1,500–2,000 calories daily for weight loss, depending on your size and activity level.

Q: Is saturated fat dangerous on keto?

A: Current evidence does not support the idea that saturated fat from whole foods (butter, meat, eggs) raises cardiovascular risk in the context of a low-carbohydrate diet. In fact, triglycerides and blood pressure often improve. However, if you have existing heart disease or high cholesterol, consult your GP before starting.

Q: How do I know if I’m in ketosis?

A: The most reliable sign is consistent weight loss or metabolic improvement (lower blood glucose, better energy). Ketone meters (blood or breath) are available but expensive. Urine strips are cheaper but less reliable after the first few weeks. Focus on how you feel and your results rather than chasing a number.

Q: Can I do keto if I’m vegetarian?

A: Yes, but it’s more challenging. Protein sources include eggs, cheese, nuts, seeds, and plant-based proteins like tofu (3 g carbohydrate per 100 g) and tempeh (7 g per 100 g). Ensure you’re hitting protein targets (0.8–1 g per pound of body weight) and track carbohydrate carefully, as plant-based proteins often contain more carbs than animal sources.

Q: What about alcohol on keto?

A: Dry wines (red or white, 3–4 g carbohydrate per 175 ml glass) and spirits (gin, vodka, whisky, 0 g) are acceptable in moderation. Beer and sweet wines are too high in carbohydrate. Avoid sugary mixers; use soda water or diet tonic instead.

The Bottom Line

The complete UK keto food list centres on fatty cuts of meat, fish, eggs, full-fat dairy, oils, nuts, and low-carbohydrate vegetables. Avoid grains, sugar, starchy vegetables, and most fruits. Track macros early on to understand portion sizes and carbohydrate content. The evidence supporting ketogenic approaches for weight loss and metabolic health is robust, with meta-analyses showing superior long-term outcomes compared to low-fat diets. If you’d rather not do the macro maths yourself, the Keto Dieting app does it for you on Google Play and the App Store.

References

1. Bueno NB, de Melo IS, de Oliveira SL, da Rocha Ataide T (2013). Very-low-carbohydrate ketogenic diet v. low-fat diet for long-term weight loss: a meta-analysis of randomised controlled trials. British Journal of Nutrition. https://doi.org/10.1017/S0007114513000548
2. Hallberg SJ, McKenzie AL, Williams PT, et al. (2018). Effectiveness and Safety of a Novel Care Model for the Management of Type 2 Diabetes at 1 Year: An Open-Label, Non-Randomized, Controlled Study. Diabetes Therapy. https://doi.org/10.1007/s13300-018-0373-9
3. Athinarayanan SJ, Adams RN, Hallberg SJ, et al. (2019). Long-Term Effects of a Novel Continuous Remote Care Intervention Including Nutritional Ketosis for the Management of Type 2 Diabetes: A 2-Year Non-randomized Clinical Trial. Frontiers in Endocrinology. https://doi.org/10.3389/fendo.2019.00348
4. Hyde PN, Sapper TN, Crabtree CD, et al. (2019). Dietary carbohydrate restriction improves metabolic syndrome independent of weight loss. JCI Insight. https://doi.org/10.1172/jci.insight.128308