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Why start a ketogenic, or keto, diet?

The keto diet, high in fat, produces rapid weight loss. Here’s a quick rundown of what you need to know before launching into a diet of this kind.
Ketogenic diet with meat, fish, eggs, avocados and the word keto
The keto diet is high in fat: meat, oily fish, avocados, eggs ...
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2021-08-04 (blog.publication: 2020-06-24)Comments (0)

A very on-trend diet

First appearing in the 1920s, the ketogenic or keto diet was initially associated with benefits for severe epilepsy. But with the advent of effective treatments for this condition, the diet became side-lined in the 1970s. It has recently found itself back in the spotlight due to one of its quite specific effects ...

Ketogenic diet: what’s its purpose?

If the keto diet is famous, it’s because it can lead to significant, and relatively rapid, weight loss. The diet consists of adjusting your intake of fat, sugar and protein. Specifically, you eat a lot of fat (75%), some protein (20%) and very little carbohydrate (5%). The body thus has to find an alternative source of energy to the carbohydrates it normally uses.

The keto diet makes levels of insulin fall and those of glucagon rise until a state of ketosis is reached. The liver then produces ketone bodies, which the body will use as its preferred source of energy (1), removing, in the process, sugar (in the liver) and fats (in adipose cells). That’s what produces the weight loss.

The many health benefits of the keto diet

Weight loss and the removal of stored fat and sugar have a beneficial effect on metabolism. Reductions in hypercholesterolaemia, blood pressure, etc. Cardiovascular indicators all improve as a result of the keto diet (2). Diabetics see their insulin resistance decrease (3). Some studies have even shown that the keto diet can mean diabetic patients are able to stop their drug treatment (4).

Some scientists believe the keto diet also offers the same promise in the case of certain cancers (5), by reducing tumour size and restricting the formation of vessels. Results are equally encouraging in relation to neurodegenerative diseases (such as Alzheimer’s and Parkinson’s) (6).

Who is the keto diet for?

If you want tolose a substantial amount of weight, the keto diet will help restore healthy cardiovascular indicators. It’s also frequently recommended for sports enthusiasts , who can use it to improve their performance.

It’s important to emphasise that the keto diet requires long-term dietary changes. It’s not a temporary fix: it has to be maintained over time in order to see continued benefits.

It’s also worth noting if you want to start a keto diet, that it can produce some unpleasant side effects during the first few weeks: bad breath, headaches, nausea … What’s more, it’s quite a strict diet and is therefore not that easy to follow over the long-term. Eating with friends in a restaurant, for example, can quickly become hard to manage. You should therefore be fully informed and committed before launching into it.

The keto diet: how to apply it on a daily basis

The rules of the keto diet are clear: it’s all about eating a lot of fat and very little sugar. But what does that mean in practice?

The foods you should prioritise include:

And those to avoid:

After a while, it becomes easier to navigate your way through the ketogenic maze. But to start with, concentrate on reading the labels of the products you buy and try to identify foods with the least amount of carbohydrate.

Before starting the keto diet, make sure you consult a qualified nutritionist or dietitian for advice. Some dietary supplements, such as MCT OIL Pure C8 (a coconut-based MCT oil, highly concentrated in caprylic acid), can also help you stick to the keto diet and increase its effects.

Though it might seem unbalanced, the keto diet has proved to be effective in terms of achieving weight loss. It has also shown particular promise in the management of certain chronic diseases. These are significant benefits which may encourage you to ‘make the leap’ – if you have the desire – and ability – to follow it!


  1. Freeman, John Mark, Eric H Kossoff and Adam L Hartman. “The ketogenic diet: one decade later.” Pediatrics 119 3 (2007): 535-43.
  2. Santos FL, Esteves SS, da Costa Pereira A, Yancy WS Jr, Nunes JP. Systematic review and meta-analysis of clinical trials of the effects of low carbohydrate diets on cardiovascular risk factors. Obes Rev. 2012 Nov;13(11):1048-66.
  3. Boden G, Sargrad K, Homko C, Mozzoli M, Stein TP. Effect of a low-carbohydrate diet on appetite, blood glucose levels, and insulin resistance in obese patients with type 2 diabetes. Ann Intern Med. 2005 Mar 15;142(6):403-11.
  4. Yancy WS Jr, Foy M, Chalecki AM, Vernon MC, Westman EC. A low-carbohydrate, ketogenic diet to treat type 2 diabetes. Nutr Metab (Lond). 2005 Dec 1;2:34.
  5. Zhou W, Mukherjee P, Kiebish MA, Markis WT, Mantis JG, Seyfried TN. The calorically restricted ketogenic diet, an effective alternative therapy for malignant brain cancer. Nutr Metab (Lond). 2007 Feb 21;4:5.
  6. Gasior M, Rogawski MA, Hartman AL. Neuroprotective and disease-modifying effects of the ketogenic diet. Behav Pharmacol. 2006;17(5-6):431–439. doi:10.1097/00008877-200609000-00009


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