MCT Oil (or MCT oil) is known by keto-diet lovers and everyone who wants to experience the miraculous properties of ketones.
Ketones are molecules that the liver produces from fat in conditions of reduced carbohydrate consumption. They replace glucose as an energy source for the brain.
What does MCT have to do with it?
The fact is, their very nature is close to a ketogenic diet and ketone production.
However, it’s important to note that they’re not mandatory for ketos. Even on the contrary, they may be more useful to those who do not reduce carbohydrates as actively as ketone dieters.
What is MST oil (Brain Octane Oil)
MCT (medium-chain triglycerides) is translated as medium-chain triglycerides. It is a type of fat, in large quantities contained in coconut oil. In smaller amounts in the milk of mammals. Lauren describes Brain Octane Oil in her article here on Lean Optimum.
Triglycerides are the most commonly occurring form of fat. In triglycerides, three fatty acids are combined into one glycerol molecule. And in MST triglycerides, these fatty acids are mid-chain. They are not short, not long, but medium. Well, that’s actually it.
The length of fatty acids is described by the number of carbon atoms, and therefore they are designated by the Latin letter C (carbon) and their number.
Triglyceride is a glycerol-connected of three fatty acids. When these acids are medium-chain acids, a medium-chain triglyceride or MCT is obtained.
Medium-chain fatty acids packed in MCT triglyceride are C6, C8, C10, and C12 in length. They are the ones that are of particular interest in metabolism.
What is special about MCT fats and how they work?
Since the fats are insoluble in water, they can’t travel through the blood freely. Otherwise, the blood would be like the surface of the soup with fat drops that would clog up the vessels.
Therefore, triglycerides are usually packaged in lipoproteins (those mistakenly called bad and good cholesterol) and chylomicrons to be delivered to the organs.
But this does not apply to MST.
They are insoluble in water too, but they do not need to be digested in the intestines and packaged in chylomicrons. They don’t even get there.
Instead, they’re absorbed from the stomach through a portal vein into the liver. And they’re quickly involved in beta-oxidation and processing into ketones.
MCT is easier to get into the cells and burn because they don’t need carnitine for that.
And if that wasn’t enough, MCTs are also reluctant to be deposited under the skin, unlike other fatty acids.
In general, it’s as if they’re designed to burn quickly and efficiently.
For example, one study on overweight men found that a diet with MST instead of other fats caused faster oxidation of fatty acids, increased energy consumption, and weight loss.
That is, MST is a source of fast energy in the world of fats.By the way, caprylic acid (C8) is better than other medium-chain fatty acids at processing into ketones.
Why do you need MCT
Consider the different situations in which MST can help. With a regular keto diet.
On a ketogenic diet, the daily carbohydrate limit is usually 20 grams. With this limit, liver ketone production is almost guaranteed.
But there are several cases where ketones obtained from outside can be useful:
The vegan keto-diet. When eating only vegetable foods, the main problem is getting enough protein without exceeding the carbohydrate limit.
A moderate keto diet. For example, when we give ourselves more freedom with berries, fruits, and vegetables, but want to stay in ketosis.
In both cases, exceeding the carbohydrate limit slows down ketone production. The presence of MCT oils stimulates their own production and increases ketone levels in the blood.
Entering ketosis for the first time or after a break
Entry into ketosis may be due to the passage of an energy “pit” – the moment when liver glucose runs out and ketones are still produced in insufficient quantities to replace it.
Therefore supplementation with MST can help to enter ketosis more quickly and alleviate symptoms, including psychological ones.
A study of 28 people in New Zealand found that there was such an effect, although it was not significant. 
So it is better to try it on your own and evaluate its effectiveness for yourself. MCT as an energy source for the brain
The role of MCT as an energy source is difficult to overestimate in neurological diseases such as Alzheimer’s (read more in the article). Alzheimer’s and Parkinson’s diseases are characterized by the starvation of brain cells. They lose the ability to use glucose effectively.
It has been shown that MCTs by stimulating ketogenesis can compensate for the energy deficiency that brain cells experience due to glucose metabolism disorders. 
Fats cannot enter the brain, which is why some people incorrectly think that the brain is completely glucose-dependent. That’s not true. The brain can feed on ketones. But there is evidence that MCTs themselves are able to reach the brain and use its cells as energy sources.
The role of ketones and MCT in providing energy to the central nervous system…