Plant-Based vs Keto Diet: Key Health Benefits, Differences & Which Is Right for You

What are The Main Health Benefits of a Plant Based Diet vs a Keto Diet?

A good starting point in answering this question is in understanding the reason for adopting any sort of diet in the first place. Answers will no doubt include reasons such as weight loss, to help with medical issues, to support fitness goals, to help with confidence etc and the basic principle of creating a calorie deficit often results in people adopting a restrictive approach to what they are putting in their bodies.

While being effective in the short term, popular diets such as the keto diet, low carb diets such as the Atkins diet, or protein fast diets like the Dukan diet are quite difficult to maintain in the long term in the real world. How often does a diet start well and initial goals are achieved only for the wheels to fall off over time?

It is possible to achieve these goals with more incremental change and this is where a whole food plant based diet comes into play.

Crucially, there is a fundamental difference in adopting a whole food plant based diet.

This is not about restriction or creating calorie deficits or disrupting the levels of macronutrients you consume. This is more about a sustainable lifestyle change, eating clean, and getting more balance into your diet. A plant based diet encourages a range of foods and works best with a variety of macro and micronutrients.

At Mell’s Kitchen we purposely offer 3 day and 5 day meal plans to help support normal, everyday lifestyles where the majority of food you eat is balanced and healthy, but we leave enough flexibility for the occasional portion of salt and pepper chips.

Food, after all is said and done, is one of life’s great pleasures and we strongly believe that plant based whole food diets over a complete, holistic approach to nutrition that goes beyond simple macronutrient ratios.

Benefits Include:

1. Nutritional Completeness: A plant-based diet provides a broader spectrum of nutrients, including fibre, antioxidants, and phytonutrients that are often lacking in more restrictive diets.
2. Health Outcomes: Extensive research suggests that plant-based diets are associated with lower risks of chronic diseases such as heart disease, type 2 diabetes, and certain cancers.
3. Environmental Impact: Perhaps the most significant advantage is the substantially lower environmental footprint compared to diets heavy in animal products. The UK government listed reducing the consumption of red meat as one of its  prioritised published goals to reduce carbon footprint by 2030.
4. Metabolic Health: The diet supports stable blood sugar, reduces inflammation, and promotes overall metabolic wellness.

The key is not just eliminating animal products, but focusing on whole, minimally processed plant foods. This means choosing entire foods like fruits, vegetables, whole grains, legumes, nuts, and seeds, rather than relying on processed plant-based alternatives.

Dietary Approaches Compared

So what are the differences in these diets? Below I summarise the key aspects of each diet.

Plant-Based Whole Food Diet

• Composition: Emphasizes unprocessed or minimally processed plant foods
• Key Components: Fruits, vegetables, whole grains, legumes, nuts, and seeds
• Macronutrient Profile: Moderate protein, high complex carbohydrates, moderate healthy fats

Keto Diet

• Composition: Very high fat, extremely low carbohydrate
• Key Components: Meat, fish, eggs, dairy, oils, low-carb vegetables
• Macronutrient Profile: High fat (70-80%), very low carbohydrate (5-10%), moderate protein
• High Protein Diet
• Composition: Emphasizes protein-rich foods
• Key Components: Lean meats, fish, eggs, dairy, protein supplements
• Macronutrient Profile: High protein (often 30-40% of calories), varied fat and carbohydrate intake

Low Carb Diet

• Composition: Reduces carbohydrate intake
• Key Components: Meat, fish, eggs, non-starchy vegetables, some dairy
• Macronutrient Profile: Reduced carbohydrates, increased protein and fat

Why Plant Based?

Well, plant based diets offer a range of nutritional benefits. They are dense in micronutrients and provide a wide range of vitamins, minerals, and antioxidants. They are also rich in fibre which supports digestive health and gut microbiome, and they are unique in their phytonutrient diversity as they contain significant numbers of beneficial plant compounds not found in animal-based diets.

As well as the impact on weight management, some of the favourable health outcomes of a plant based diet are linked to chronic disease prevention, such as reducing the risk of cancer, heart disease and limiting instances of type 2 diabetes. Plant based diets are associated with reducing inflammation, improving insulin sensitivity and regulating cholesterol levels.

The growth of plant based eating has benefited the environment by reducing emissions and conserving water due to the difference in required farming practices associated with rearing livestock.

But, plant based diets can be challenging for people too, with a limitation being the amount of planning required to ensure you have the right balance of nutrients and enough protein in your food intake. A plant based diet is not the simplest path to follow.

Also, plant based food is often lower in calories which means that more food is required to hit required daily levels and, in general, there are less plant based alternatives available in shops and restaurants, limiting choice and sometimes increasing cost.

Why Keto?

Keto diets have been linked with improving mental clarity and cognitive function and the keto diet was initially developed to treat epilepsy and may offer some neuroprotective effects for certain brain conditions.

Similar to a plant based diet, keto diets can improve blood sugar stability, increase levels of good cholesterol and reduce inflammation markers.

Keto diets are very effective in terms of appetite suppression and in turn drives weight loss and Improved triglyceride levels, a common factor in reducing potential heart disease.

As with most diets, keto diets do have limitations and one of the main concerns is regarding increases to the amount of saturated fat one consumes. Over time this could potentially have a detrimental impact on an individual’s long term cardiovascular health.

When compared to a plant based diet, the keto diet is less sustainable and doesn’t really compete in terms of positive impact on the environment.

Why High Protein?

High protein diets are very effective to support gains in muscle mass and often result in improving bone density, skin, hair and nail health.

They help with recovery, healthy ageing and lower the risk of weight regain.

Unusually for any sort of diet they are effective in terms of adopters feeling full and satiated. 

However, high protein diets often rely on consuming higher levels of animal protein so this is clearly problematic for the environment and also raises ethical concerns about whether it’s morally right to eat animals.

From a health perspective, a high protein diet can result in a less diverse micronutrient profile (and fewer associated health benefits) than some alternative diets.

Why Low Carb?

Some of the health benefits are very similar to those experienced on a keto diet, with increased levels of good cholesterol and an output of improved triglyceride levels.

Similar to high protein diets, adopters often feel less hungry and, in practical terms, a low carb diet is one of the easiest to adopt and maintain, as this can be achieved through portion control rather than by having to devise any elaborate meal plans.

As with all the diets reviewed here, a low carb diet can be very effective in terms of weight loss and it is one of the easiest diets to sustain.

However, low carb diets can often lack sufficient fibre and, similar to a high protein diet can result in an increased reliance on animal product consumption, generating some similar question marks around health, ethics and environmental sustainability.

Conclusion

Each form of dieting has its merits and its limitations.

Millions of people are choosing plant based diets, keto diets, low carb diets or high protein diets as we speak. They are losing weight, improving their health and boosting their confidence.

It’s clear that a plant based diet can stand as a practical alternative to other forms of diets but ultimately the diet you choose has to fit with what works best for you.

As ever, we would always recommend consulting with a dietician or a medical professional if you believe your diet is affecting your health.