April 30


MCT Oil Intermittent Fasting – Everything You Need to Know

By Dr. Junaid Tariq

April 30, 2020

bulletproof coffee, intermittent fasting, mct oil while intermittent fasting

Intermittent fasting has massive health benefits and certainly recommended for a weight loss boost when following the ketogenic diet. This post will guide you through how to use MCT Oil while intermittent fasting. 

MCT Oil and Intermittent Fasting

MCT oil is used as a part of intermittent fasting by mixing it in coffee every morning. This can be done even when you are fasting with a cup of plain black coffee.

Consuming MCT oil by mixing it in coffee helps ensure that your body can get through long hours of starvation with less difficulty.

When you drink this coffee, your body will receive a signal of satiety. You will no longer feel hungry. You will be able to increase the duration of your fast for a few more hours to achieve maximum fat-burning advantages.

Because most of the benefits associated with intermittent fasting are due to autophagy, this extension of your fast using MCT oil-enriched coffee will make a big difference.

You may drink black coffee with one teaspoon of MCT oil in it instead of eating a meal. This amount of MCT Oil will not break your fast and help support ketosis, mental clarity and energy to keep you active during the fast, ensuring that body fat is reduced.

when to take mct oil intermittent fasting

Coffee With MCT Oil During Intermittent Fasting

This protocol helps to improve your performance and to get extra benefits as compared to plain intermittent fasting with no added MCT oil.

Step 1

Finish your dinner before 8 pm, and refrain from eating anything later that night. You must not snack once you have had dinner. You can go to bed at whatever time you wish.

Step 2

Drink MCT oil mixed in black coffee every morning.

Be sure to buy good quality coffee beans. Cheaper versions of coffee can destroy the positive effects due to the presence of mycotoxins in them. We recommend Bulletproof coffee. You may have another cup of this coffee, but it must be before 2 pm. 

Step 3 (optional)

Work out.

working out while fasting

This step is not required; however, it will help you lose weight and gain muscle. If you wish to exercise, try lifting heavy objects right before breaking your fast in the next step. High-intensity weight training sessions are best for achieving your goal.

Step 4

Restrain yourself from eating anything for 18 hours. This is your fasting time and must start from 8 pm the previous night until 2 pm the next day. The only thing you can consume during this time is MCT oil-enriched coffee.

Step 5

Eat solid meals from 2 pm until 8 pm. This is your eating window for the day. The number of meals you consume and the total amount of calories you eat are irrelevant.

Below is a sample day of intermittent fasting combined with MCT oil:

8 am: Consume a cup of black coffee with MCT oil.
2 pm: Break your fast with solid foods, and eat throughout your eating window until 8 pm.
8 pm: Eat your last meal before 8 pm, and let the fast begin.

Combining MCT oil with intermittent fasting can improve your brain function, extend your life, and make you resilient on different levels. 

Reasons to Consume MCT Oil During Intermittent Fasting

mct oil intermittent fasting

Here are the reasons you should be using MCT oil during intermittent fasting:

1. It affects mTOR

mTOR refers to Mammalian Target of Rapamycin which is related to a mechanism by which the muscles of your body increase their protein synthesis. This mechanism is inhibited by coffee and exercise, causing it to “spring back” and lead to a greater muscular buildup.

There are three different things that can affect your mTOR levels: exercise, coffee, and intermittent fasting. Using this coffee combined with intermittent fasting on a 4500-kilo joule diet even with no exercise has been said to yield exceptional results in terms of fat loss.

Because plain intermittent fasting does not include the use of coffee, it possibly affects one or two of the mTOR triggers. Intermittent fasting combined with MCT oil-enriched coffee may turn out to be better as it uses all three mechanisms that directly affect mTOR.

Additionally, consuming black coffee with MCT oil does not affect your fast. You will not only enjoy the benefits of MCT oil, but you will also take full advantage of the fasting as well.

2. MCT Oil Promotes Ketosis

Intermittent fasting alone has the power to induce ketosis (the fat-burning mode) in your body.

However, this state of ketosis is extremely sensitive. The ingestion of even a slightly higher amount of carbohydrates can throw you out of this state immediately.

Using MCT oil together with intermittent fasting will not only promote your body to produce more endogenous ketones, but it also provides a highly efficient source of fuel for your brain.

3. MCT Oil is Beneficial for Your Brain

Let’s be honest. You are not a professional athlete, a model, or a superhuman. Fasting throughout the day may make you feel hungry, cranky, and lazy all the time.

Adding MCT oil to your fasting routine can help charge up your body. Consuming it every day helps you to stay fueled and to get through the day more easily.

4. MCT Oil and Caffeine Helps Boost Metabolism

how to use mct oil while intermittent fasting

Another reason why you should add MCT oil to your daily diet is its metabolism-boosting abilities.

This effect cannot be achieved via fasting alone. An increased metabolism will make sure you maintain your weight and avoid unnecessary fat gain.

Does MCT Oil Break a Fast?

Technically, any source of calories will break a fast, including MCT Oil - if you have too much.

A small portion of MCT Oil (such as one teaspoon) mixed into unsweetened black coffee will not disturb your fast. 

Be sure to refrain from eating carbohydrates, proteins, adding milk or cream to the coffee, or anything that will have an effect on your insulin levels. As soon as your body requires an insulin response, your fast has broken.

Will adding protein to my coffee break intermittent fasting?

does mct oil break intermittent fasting

Yes. Eating too much protein can take you out of ketosis. Be careful not to consume too much of it. This includes adding collagen and protein powders to your coffee. You do not want to do this during a fast.

Can I Have Bulletproof Coffee When Intermittent Fasting?

fat fast

A fat fast is when you drink coffee with added MCT Oil and grass fed butter or ghee, otherwise known as Bulletproof Coffee

Please note, the calories in the oil, butter and/or ghee combined will affect your body's autophagy process by slowing it down - but - the fat helps keep your brain fueled and your body in ketosis. 

MCT Oil, butter and ghee do not affect your insulin levels and therefore some argue that keto coffee such as bulletproof coffee, or keto coffee bombs do not break a fast. 

Whilst technically, any ingestion of more than 50 calories is likely to break a fast, it is the way your body processes MCT Oil, butter and ghee that is important. 

It is also important to note we have not mentioned using coconut oil in your bulletproof coffee here. Coconut oil will definitely break your fast. Use a high quality, preferably C8 MCT oil in your coffee instead of coconut oil. 

Read our post on keto coffee for more information and bulletproof coffee recipes.

What is the Best MCT Oil for Keto?


Perfect Keto

100% C8 MCT Oil from Perfect Keto. We love Perfect Keto MCT Oil as it tastes great, is pure C8 oil and is reasonably priced. 

5 of 5 Stars
kiss my keto mct oil

Kiss My Keto

Kiss My Keto C8 MCT Oil is another top choice for a quality MCT Oil that is clean and flavorless. Kiss My Keto also have a C8 and C10 MCT Oil blend. Our preference is always the C8 on its own. 

5 of 5 Stars
sports research mct oil

Sports Research MCT Oil

Another excellent choice for a superior quality C8 MCT Oil is Sports Research. We like the squirty cap on this MCT oil too.

5 of 5 Stars
bulletproof brain octane oil

Bulletproof Brain Octane Oil

Bulletproof C8 MCT Oil, otherwise known as Brain Octane Oil is a top seller in the MCT oil market and another great choice as a daily MCT oil. Completely flavorless - definitely worth buying if you struggle with the slight taste of other MCT Oils!

5 of 5 Stars


Using MCT oil during intermittent fasting is a smart way to double the benefits of fasting. Additionally, MCT Oil during intermittent fasting makes the process of fasting easier and more tolerable.

If you are someone who has a hard time fasting for long periods of time, consider using MCT oil every morning in the form of this MCT-oil enriched coffee.

best mct oil for intermittent fasting

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  1. When I started Keto about 6 weeks ago I stopped drinking coffee since I like my coffee sweet with a lot of french vanilla creamer and Stevia. I have seen mct creamer and thought of trying it. Will mct creamers + stevia break my fast?

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