How to Get Into Ketosis Fast
The low-carb, high-fat keto diet has been shown to improve body composition and increase endurance performance. But getting into ketosis is difficu...
Updated November 15, 2019
If you’re in the keto diet community, you've likely used—or at least heard about—MCT oil. It’s a staple for helping people with satiety and energy while on keto.
But, that buzz is starting to spread beyond just keto. MCT oil is starting to appear in more and more products on the shelves of grocery and health food stores around the country. So maybe you've seen MCT oil out there, but you're not exactly sure of why you should be adding it to your diet, and what the potential benefits are. To understand why MCTs are so powerful, it's important to look at the science behind them.
Weight loss and increased energy are just a couple of the positive effects you might experience with MCT oil use. To get a better understanding of MCTs, you have to dive deeper into their chemical makeup, and how they trigger certain biological responses.
Let’s explore what MCTs are, how they work, and how they might be a particularly beneficial addition to a keto diet for improved results. And if you'd like to learn some ways of incorporating MCTs into your diet, be sure to check out our recipes at the bottom of the page.
To understand MCTs, let’s start with the basics. MCT stands for medium-chain triglycerides. Triglycerides are three fatty acid groups bound to a glycerol backbone; they’re the main constituents of body fat in humans and animals, and are natural fats found in food.
People tend to have a misconception when it comes to triglycerides—they usually associate triglycerides with bad cholesterol levels and risk of heart disease. There’s some truth to that.
High levels of triglycerides in the blood pose a risk of cardiovascular disease, but not all triglycerides should be viewed negatively.
In fact, some MCTs are considered to be the healthiest fats around.
There are three types of fatty acids: short-chain, medium-chain, and long-chain. The length of the “chain” refers to the number of carbon atoms linked together to form these fatty acids.
Short-chain fatty acids are not obtained through food, but are actually produced by bacteria in the gut when dietary fiber is fermented. They help reduce inflammation and protect the digestive system.
Long-chain triglycerides can be found in olive oil, fish, nuts, avocado, and meats. Some long-chain triglycerides, such as Omega-3s provide cardiovascular benefits.
Medium-chain triglycerides can be found in limited amounts in foods such as coconut oil and palm oil.
The distinction between MCTs and other types of fats (and lengths of fatty acid chains) is in how they're processed by the body.
Unlike other fatty acid chain lengths, MCTs are not digested and absorbed in the same way as other fat sources. MCTs go directly from the gut to the liver and can be used as an immediate energy source themselves, or they are quickly converted to ketones. MCTs can be extracted from food sources, such as coconut, and liquified into a pure form of 100% medium-chain triglycerides.
Now that you understand what makes MCTs unique from other types of fats, let’s get into the different types of MCTs.
MCTs contain anywhere between six and 12 carbon atoms in the fatty acid chain. It’s a range—and the term MCT covers all the triglycerides that have “medium” length fatty acid chains.
Although they are all considered MCTs, the different chain lengths have slightly different physical properties, metabolism in the body and therefore, different effects and uses. So, depending on your goals, not all MCTs are created equal.
Known as the shortest MCT, caproic acid contains six carbons in each fatty acid chain. Although it can be converted quickly to ketones, it has a bitter taste and may cause stomach problems.
It can be found naturally in plant and animal sources, but generally comes with an unpleasant odor. Some MCT products on the market contain caproic acid, but it’s not the optimal source of MCT to use as a dietary supplement.
Caprylic acid, or C8, contains eight carbon atoms in each fatty acid chain. Known as the most ketogenic form of MCT, it can provide an array of health benefits because it can be converted to ketones faster than any other form of MCT.
When it comes to enhancing fat burning and increasing energy levels, C8 is the MCT to choose. Its effect was significantly higher in the absence of an accompanying meal.
About 6% of C8 occurs naturally in coconut oil, so it makes sense to try and find a more concentrated version of C8 instead of just using coconut oil. While on keto, products with the highest levels of caprylic acid (C8) can help you hit your goals. An MCT oil or MCT oil powder that contains pure C8 is a fast way to kickstart ketone production and boost your metabolism.
Some of the benefits of C8 include:
These are just some of the benefits associated with caprylic acid (C8). As the world’s most ketogenic form of MCT, you should strive to make sure the majority of MCTs in your diet contain C8 to maximize health benefits.
Capric acid, or C10, can be found in coconut oil, palm kernel oil, and some forms of animal milks. It provides a few unique benefits in addition to what we’ve already mentioned regarding metabolism:
C10 is seen in many MCT products, but it might not be the optimal MCT for ketone production—that’s still C8.
Lauric acid can most commonly be found in coconut oil, accounting for nearly half of coconut oil’s MCT content. The main benefit associated with lauric acid (C12) is its antimicrobial properties.
Lauric acid helps your body develop monolaurin, a compound responsible for killing pathogens such as measles, herpes simplex, staph, and E. coli.
Besides from the antimicrobial benefits, it can also serve a few other functions, including:
The topical benefits of lauric acid (C12) possibly make it a viable form of skin treatment in certain circumstances. But again, for purposes of ketone production, stick with C8.
You know the differences between different MCT chain lengths. Now, let’s look at the benefits of including MCT into your diet.
Not only are MCTs a direct source of energy, they can also help create ketones for brain and body fuel.
MCTs are rapidly digested and absorbed—most fats travel slowly from the gut into the bloodstream, whereas MCTs are directly shuttered to the liver where they can be used for energy for the body or converted into ketones.
While fat can’t be used directly as brain fuel, that’s where the ketone production comes into play. Ketones pass through the blood-brain barrier making them a direct source of energy for the brain as well. This mechanism supports the anecdotal feelings of mental sharpness associated with MCT use and ketosis overall.
One of the main benefits of MCTs are helping directly or indirectly aid in weight loss. MCT oil can help increase the production of certain hormones—like peptide YY and Leptin—which help you feel full.
A research study showed that when people consumed a breakfast containing MCT oil they ate less food at lunch compared to those who had the same amount of coconut oil.
MCT oil can also help to assist directly with weight loss through increased energy expenditure.
In one study, individuals taking MCT oil increased their energy expenditure, leading to weight loss.
Compared to long-chain fatty acids, MCT consumption resulted in greater fat loss (due to increased energy expenditure and fat oxidation).
Studies performed on animals also showed MCT oils may result in decreased body fat through improved metabolism and enhanced thermogenesis.
Consuming MCT oil may also boost your athletic endurance. One study showed that taking MCT prior to exercise enabled athletes to work at 80% of their VO2 max for longer when compared to athletes taking LCTs.
The ingestion of foods containing MCTs may help suppress utilization of carbohydrates for energy production through increased utilization of fatty acids for generating energy. In other words, you replace the energy coming from carbs and glucose with energy coming from fat and ketones to fuel your workout. It takes a while to become fat adapted, but once you’re able to tap into the seemingly endless fat stores in the body, endurance performance may get better.
MCT oils may also impact athletic performance through reduction in lactate buildup due to a shift in balance from carb to fat metabolism. In that study where athletes could exercise for longer, the researchers also found that they had lower lactate levels.
If you take MCTs prior to exercise, your fat burning capabilities may increase due to a higher resting energy expenditure. Essentially, you burn more fat during your workouts than you may have otherwise, in part because you’re consuming more fat.
Maintaining a healthy weight is one of the most effective ways of lowering the risk of heart disease.
Since MCT oil can help with weight and fat loss, this can in turn lower the incidence of heart disease in some people.
A study was performed on twenty-four healthy overweight men who consumed controlled diets designed to maintain weight over the course of two months.
Poor diet, lack of exercise, and genetic predisposition can cause heart disease, but MCT oil consumption may be a tool capable of supporting heart health.
Building off the other metabolic benefits of MCT, it may be able to help treat individuals with diabetes.
A study was conducted on two groups of overweight type 2 diabetic patients.
While the benefits of MCTs obviously stretch outside of just ketone production, they’ve found a special home among keto diet practitioners.
What’s so special about ketones?
Before we dive into specifics, let’s talk basics. Ketones are fundamentally different substrates than the carbohydrates or fats your body typically uses to create energy.
Keto is a low-carb, high-fat diet. So when the body doesn’t have any carbohydrates to rely on for energy, it will begin using the copious fat stores we all carry with us.
The brain’s usual source of energy is carbohydrates. They’re a quick, easily-used fuel. But what about when the brain doesn’t have those carbs to rely on? That’s why we evolved to create ketones, to fuel our brain (ketones cross the blood-brain barrier). In our neanderthal days, we’d go days or weeks without food. Our bodies needed a way to create energy from what we already had—fat.
Once the body is producing ketones, ketosis in considered ketones present in the blood at greater than 0.5mM; when you hear people say they’re in ketosis, this is what they mean.
Ketosis can be achieved in two distinct ways. The first is endogenously, which means through internal mechanisms within the body. By following a low-carb diet and/or fasting, the body will eventually stop running on glucose and begin producing ketones.
However, there’s another way to get into ketosis. Exogenous ketones are consumed through external means. Using exogenous ketones can raise blood ketones to a physiological level even if you aren’t following a high-fat diet or fasting.
The level of ketosis achieved can vary depending upon the type of supplement used. BHB monoesters are a form of exogenous ketones that are used to get into a deeper state of ketosis.
MCT oil has gained substantial traction in recent years as a product shown to enhance ketone production and provide an immediate source of energy, albeit a lesser levels than exogenous ketones and salt-based products (because MCTs don’t actually contain ketones themselves).
Biologically, the body is designed to run on glucose and fat as its main forms of energy; but ketones are a more efficient fuel source when compared to glucose.
There are several evidence-based health benefits seen during a ketogenic diet, including:
The keto diet has gained popularity for a reason. Not only are the physical benefits sought after, but the mental clarity of ketosis, along with other neurological benefits, have also emerged as some of the main reasons people decide to switch to keto.
MCTs go directly to the liver, and it's here where they are converted into ketones through a process called ketogenesis. MCTs can help you stay in ketosis or get to ketosis faster, because they're a healthy source of fat and are less likely to be stored as body fat.
MCT oil can be found in coconut oil, palm oil, and even some dairy products. However, these products do not contain 100% pure MCTs. They contain roughly a low percentage of C8 (the most optimal form of MCTs), along with other types of lower-quality fatty acids. In order to optimize the effects of high-quality MCT oil, it must be extracted from other sources into a highly-concentrated, stand alone product.
Although MCT oil can provide plenty of health benefits, it can be easy to go overboard on calories if you do not measure serving sizes correctly. Even on a ketogenic diet, you should still be cognizant of your overall caloric intake to avoid overeating.
Taking too much MCT oil can also cause gastrointestinal distress in certain individuals in the form of side effects such as diarrhea, vomiting, bloating, and cramping.
MCT oils can be incorporated into your diet in a variety of different food and beverage choices.
You can use MCT oil as a cooking oil, smoothie ingredient, or even to create fat bombs. The possibilities are endless, and you can use a bit of creativity when determining how best to use MCT oil in your own diet. While we've discussed MCT oil at length, MCT oil powder is also a viable option for easy mix-ability.
One way many people choose to consume MCT oil as part of their diet is by making butter coffee (also called Bulletproof coffee). A unique blend of coffee, MCT oil, and grass-fed butter, butter coffee can provide a boost of energy to help jump start your day.
Traditional Butter Coffee
Drinking butter is an easy way of incorporating MCT oil for a daily energy boost.
If you prefer to get fruits and vegetables through smoothies, why not try adding some MCT oil to your drink?
Fruit MCT Smoothie
Add in other fruits and vegetables as desired, to taste.
MCT-based smoothies are a satisfying, filling snack that can be made with limited time, and may even be used to replace a meal.
If salads are a staple of your diet, you may want to try creating a MCT-based dressing to enjoy your greens and get a boost of healthy fat.
Green Keto Dressing
Regularly eating salads is a great way of ensuring you get enough micronutrients in your diet. This recipe will add a dose of healthy fat to your greens.
If you are unfamiliar with fat bombs, they are keto friendly snacks designed to curb sugar cravings.
They generally contain ingredients such as oil, butter, nuts, and seeds, designed to satisfy cravings and keeping you full. If you are following a ketogenic diet, but still get a sweet tooth, try making some fat bombs.
Chocolate Delight Fat Bombs
Instead of reaching for the candy bar, try making some fat bombs to get rid of that nagging sweet tooth.
If you’re on keto, adding MCTs to your diet is almost a no-brainer.
Reducing body fat, improving satiety, and enhancing of ketone production—these are just a few of the potential health benefits of MCTs.
If you are practicing a ketogenic diet and want to get into ketosis faster, MCT is a great way to increase ketone production via healthy fat. Simply using an MCT-based supplement daily may supercharge the metabolic benefits associated with keto. And even if you’re not keto, adding a high-quality source of fat to your diet may help reduce cravings and help you feel fuller for longer throughout the day.
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