Why Keto Is Not the Same as Carnivore

The ketogenic diet is a low-carbohydrate, high-fat eating plan designed to induce ketosis. While it shares some overlap with the carnivore diet, the two are fundamentally different in structure and nutritional philosophy. Understanding these distinctions helps avoid common misconceptions about macronutrient balance and long-term sustainability.

Macronutrient Composition

A standard ketogenic diet typically consists of 70-75% fat, 20-25% protein, and 5-10% carbohydrates. This balance allows for inclusion of non-starchy vegetables, nuts, seeds, and dairy. The carnivore diet, by contrast, eliminates plant foods entirely, deriving nearly all calories from animal products. Research indicates that very-low-carbohydrate ketogenic diets can support metabolic health without requiring complete exclusion of plant matter (Bueno NB et al., 2013).

Fibre and Micronutrients

One critical difference lies in fibre intake. The ketogenic diet encourages leafy greens and above-ground vegetables, providing soluble and insoluble fibre that supports gut health. A carnivore approach lacks these plant-derived fibres entirely. At Sainsbury’s, a 200g bag of spinach costs £1.20 and provides nearly 3g of fibre – an amount impossible to replicate with meat alone. keto-friendly vegetables like courgettes and aubergines feature regularly in ketogenic meal plans but have no place in strict carnivore regimes.

Metabolic Flexibility

Both diets may induce ketosis, but they achieve it through different metabolic pathways. The ketogenic diet trains the body to utilise both dietary fat and stored body fat efficiently. The carnivore diet’s extreme protein intake can trigger gluconeogenesis, where the liver converts excess protein into glucose. Studies suggest that moderate protein intake with higher fat consumption – as seen in keto – may better support sustained ketosis (Sumithran P et al., 2013).

What This Means in Practice

During British winter months, a ketogenic approach allows for hearty vegetable soups with bone broth and cream, while carnivore dieters would omit the vegetables entirely. Tesco sells 500ml of double cream for £1.65, a staple in keto cooking but less central to carnivore meals. The NHS acknowledges low-carb diets as an option for weight management but doesn’t endorse complete elimination of plant foods.

Long-Term Considerations

Nutritional adequacy differs markedly between the two approaches. The ketogenic diet’s inclusion of plant foods provides phytonutrients and antioxidants absent in carnivore eating. While both diets may help with managing insulin resistance, keto offers more variety and potentially better micronutrient coverage over time.

Frequently Asked Questions

Can you do keto without vegetables?

Technically yes, but it would resemble a carnivore diet more than standard keto. Vegetables provide essential nutrients and fibre that support digestive health and metabolic function.

Which diet is better for weight loss?

Both may lead to initial weight loss, but keto’s greater food variety often makes it more sustainable long-term. Individual responses vary based on metabolism and preferences.

Do you need supplements on carnivore but not keto?

Potentially. The carnivore diet may require supplementation for vitamin C and certain minerals that would normally come from plants in a keto diet.

The Bottom Line

The ketogenic and carnivore diets produce ketosis through different nutritional approaches. Keto incorporates strategic carbohydrate reduction with plant-based foods, while carnivore eliminates them entirely. For those seeking metabolic benefits without complete food group exclusion, the ketogenic diet offers a more balanced path. 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.

Educational only — not medical advice. This article is for general information. Speak to your GP before changing your diet, especially if you have type 1 or type 2 diabetes, kidney or liver disease, are pregnant or breastfeeding, or take medication for blood pressure, cholesterol, or blood glucose.

References

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
Sumithran P, Prendergast LA, Delbridge E, et al. (2013). Ketosis and appetite-mediating nutrients and hormones after weight loss. European Journal of Clinical Nutrition. https://doi.org/10.1038/ejcn.2013.90