Lean Optimum » MCT Oil » Onnit MCT Oil Reviews (2024) | Is This Supplement Safe for Consumption?

Onnit MCT Oil Reviews (2024) | Is This Supplement Safe for Consumption?

A few weeks ago, I made a very important decision. I started to follow a ketogenic or keto diet. So that means no more carbs for me. I did it because I wanted to lose weight and because I’ve heard of the many other benefits of the keto diet.

LogoIt was all well and good, but on my third day on a diet, I started to feel weak.

I did some research and learned that this is normal. I also learned that individuals on a keto diet could greatly benefit from MCT oil

It can give a quick boost of energy and can help people maintain a state of ketosis, also known as the fat-burning state.

I searched online for the best MCT oil brands and bought a few that I believe will work best for me. 

One of the brands I have tried is Onnit. In the following paragraphs, you will learn more about this brand, its features and benefits, and how it compares to other brands.

This Onnit review is for those who are looking for a good brand of MCT. 

Here, you will also learn what to look for and what best MCT Oil brands have in common.

What is Onnit MCT Oil?

ONNIt Oil Mct

For those who do not know what MCT means. Does this word ring a bell? It has been the subject of controversy in recent years because of its supposed negative effects. 

According to some experts, triglycerides can raise your cholesterol levels, clog your arteries, and increase your risk of suffering from a heart attack and stroke. Scary right? 

CocktailsWhat you should know, however, is that there are two different kinds of triglycerides: long-chain triglycerides or LCTs and MCTs. In Western countries such as the US, people usually consume LCTs.

LCTs are the bad guys. They are the ones that can cause all sorts of health problems. MCTs, on the other hand, are the superheroes. They are absorbed quickly by the body and are converted into energy rather quickly as well.  

Also known as medium chain fatty acids or MCFAs, MCTs also come with other health benefits, which you will learn about later. Unfortunately, the typical American diet is low on MCTs. 

You can blame misinformed health experts on that because they are the ones who have given MCTs a bad reputation. If you read the available scientific literature on MCTs, you will learn that it is anything but harmful. 

Despite the bad rep, MCT is being used by some of the world’s top health experts, fitness enthusiasts, and athletes. And they are getting excellent results. 

Onnit contains 100% pure MCT that comes from coconut oil. Pure coconut oil is an excellent source of MCT. Half of the total fatty acids in coconut oil are MCTs. Coconut is also a sustainable and environment-friendly source of MCT. It Is vegan, dairy-free, and gluten-free.

MCT Oils ONNITSome brands get their MCT from palm oil. It is a cheaper source, but if you care about the planet, then you should refrain from buying anything that has palm oil as an ingredient. In some parts of the world, whole forests are being burned to plant and cultivate palm trees. 

I don’t want any part of that’s why I chose a socially-responsible brand. 

MCT from coconut oil is also an excellent source of dodecanoic capric acid to add, which serves as a slow-burning fuel for the body that can give you energy for the whole day (more about dodecanoic acid later).

It makes it a perfect choice for those on a keto diet like me. 


It does not need to be refrigerated. People looking for stores near me can find Onnit in stores such as Walmart, Costco, GNC, Sprouts, and Whole Foods. Online, you can order it through Amazon.

You can also get an emulsified version of Onnit Oil that can be used as creamer in coffee.

Is Onnit Organic?

As far as I know, Onnit is not organic. In all of the articles, I have read about the product, I have never encountered anything that says it is an organic product. 

However, this should not stop you from trying it. This product offers plenty of health benefits, which you will learn more about later.

What About Lauric Acid?

As mentioned earlier, Onnit Emulsified is an excellent source of dodecanoic acid. You’ve also learned that lauric-acid is a slow-burning fuel that provides sustained energy. There are more things you need to know about this beneficial fatty acid. 

Dodecanoic acid is a type of MCT and a very important one. This is because it is a precursor to monolaurin, a beneficial compound that is found in breast milk. 

Lauric Acid Formula

Monolaurin is one of the compounds that make breast milk the perfect food for babies, but it also presents plenty of health benefits for adults mainly because of its antimicrobial properties and its ability to stabilize cell walls.

What Are the Benefits & Side Effects?

Now here is the part you’ve all been waiting for, the part that tells about the benefits and side effects. But first the benefits.

It can protect you from heart disease

Studies have shown that regular consumption of MCTs can significantly reduce your chances of getting heart disease.

Onnit Emulsified MCT Oil can help you lose weight

It is hard to believe that consuming fat can be good for weight loss. But it is true. Unlike long-chain fatty acids, medium-chain triglycerides oil is less likely to be stored as fat by the body. It is because the liver quickly metabolizes it after consumption. If you have a problem with over-eating, then MCT oil can also help. When you consume MCTs, you will feel full and satisfied for a long time and will not need snacks frequently.

It can protect you from disease-causing bugs

Onnit Oil is a natural antimicrobial that can protect you from gram-positive bacteria as well as viruses and fungi. Therefore, it can help you deal with health conditions such as acne, candida, and MRSA, which is caused by antibiotic-resistant bacteria.

It is good for your brain

It may improve your ability to focus and to concentrate. Because of its slow-burning nature, it is an excellent fuel source for the brain, unlike sugar that can cause brain fog. So if you want to think more clearly, listen better, and make quick and firm decisions, then you should take MCT.
Like other food supplements, it also has its share of side effects. MCTs , in general, can cause diarrhea, vomiting, irritability, nausea, stomach discomfort, intestinal gas, and essential fatty acid deficiency.
I have discovered that by taking it with food, I was able to avoid experiencing the side effects mentioned above. 

Onnit MCT Fuel

It is also not for everyone. The following people should avoid taking it.

  • Pregnant and lactating women
    There is not enough information regarding the safety of MCT for pregnant and nursing women. So to be on the safe side, avoid taking it if you are pregnant or lactating.
  • Individuals with diabetes
    The buildup of ketones, can cause problems for people with diabetes. People with diabetes should, therefore, avoid it. 
  • Individuals with liver problems
    People with liver problems may not be able to metabolize it well and should, therefore, avoid it.
    It is also a good practice to consult your doctor first before you take Onnit Emulsified. 

Onnit Oil vs Bulletproof Brain Octane Oil

Same as Onnit, Bulletproof Brain Octane Oil is made from coconut oil. However, it contains higher amounts of MCTs compared to other brands. But it is more expensive. 

vs Bulletproof

One advantage of Bulletproof Brain Octane OIl over Onnit is the fact that it is available in bottles of different sizes, making it more accessible to people on a budget or those who are not ready to commit to purchasing a bigger bottle. 

MCT Onnit Oil, on the other hand, only comes in one bottle size (24 fl. oz.).

Onnit vs. Sports Research MCT Oil

Sports Research also contains beneficial dodecanoic acid just like Onnit.

vs Sports Research

It also derives its MCTs from coconut oil and not palm oil. Sports Research is available in two bottle sizes. 

Some people who have tried Sports Research complained of experiencing diarrhea and headaches. 

Does Onnit Labs MCT Work as Advertised?

Yes, it does. And I’m talking based on experience. Advertisements and articles featuring Onnit makes some very lofty claims. Some may seem hard-to-believe but they are not really far from the truth. I have experienced all the benefits mentioned above.

Does MCT Oil Help With Weight Loss?

We are sure you have already heard of MCT oil and have used it to some effect. There is little doubt that it is capable of helping with weight loss. It can boost your metabolism, provide you with energy and help you burn fat. Not only this, but it can also improve your heart health, keep you away from diabetes and also help improve sleep. Read on to know more about it. Yes and No. Weight loss is caused by caloric deficit and can only be achieved through cutting calories in your diet. If you have a low-fat diet to follow, then MCT oil is an excellent choice. MCT oil promotes fat burning and muscle repair to burn fat and build muscle.

Is MCT oil Bad for Your Heart?

MCT oil is usually marketed as a source of medium-chain triglycerides, a type of fat that some research suggests can help lower “bad” cholesterol levels and boost HDL, or good cholesterol, in the body. (Learn the best fat sources.) But a team of researchers from Emory University recently presented their findings on the quality of MCT oil products, and some say the findings may pose a real danger.

These researchers tested 39 products sold in five health-food stores in the Atlanta area that claimed to be enriched with MCT oil – none of which tested positive for the fat. What you get is a product that’s fortified with plant oil, but it doesn’t contain the actual medium-chain triglycerides that are necessary for improved health,” says lead author John Hanna, PhD.

Why does MCT oil make me nauseous?

MCT Oils are processed and absorbed in the small intestine and not the stomach, so when you take MCT without food,  your stomach may feel discomfort and it can make you nauseous as it does not have the digestive enzymes to digest the oil. When it is given with foods, or in form of form, in this case, your stomach becomes involved and this reduces the chance of loose motions or stomach distress that can happen when you push a digestive system far beyond what it’s designed to.

Is MCT Oil Bad for Your Liver?

Since MCT oil is one of the best bets for weight loss in the market, according to customer service I don’t think it’s too bad to let a few individuals consume it to have a well-balanced diet. As you can see, it is enriched with (MCTs), which have been shown to increase fat-burning. So it’s only natural to think that MO is a great source of fat-burning power, which helps to maintain energy levels throughout the day. But if you happen to consume it, there are certain health risks to be aware of.

I personally think it is great to be consumed every now and then. When I heard about it, I thought it would be great to have a fat burner like MO to support my weight loss efforts. But I don’t think I can just go ahead and begin eating MO to burn fat, all of a sudden. As it turns out, MO is an extreme source of fat and is high in saturated fat. The good news is that MO is high in monounsaturated fats. So it has a smaller impact on cholesterol levels than conventional sources of fat. However, the amount of saturated fat in MO is relatively high. So there are some potential health risks to consider.

What is MCT oil Made From?

The benefits of coconut oil as a dietary staple in the form of dietary fat is well-established. Being in liquid and mct fats (similar to the lipid profile of butter and olive oil), MCT oil also benefits in lowering cholesterol. Specifically, there are two types of saturated fatty acids – D5 and D3. D5 is the most potent type of saturated fat and, at present, it is the highest priority in lowering cholesterol. D3 is the next most potent form of saturated fat, but it’s lower in the spectrum than D5.

That means when it comes to the control of cholesterol, the best and most efficient way to do it is to lower D5 and to lower cholesterol levels within the total amount of saturated fat intake. Most saturated fats are made up of D5. Amongst other aspects, the D5 saturated fatty acids are considered to be the most detrimental to heart health because it easily absorbs into the artery walls and raises the risk of arteriosclerosis (hardening of the arteries). On the other hand, the MCT saturated fatty acids are called ‘long-chain’ because they’re very high in cholesterol and not as saturated.

Who Should Not Use MCT Oil?

While MCT oil is generally safe for many people, there are specific groups who should exercise caution or avoid its use altogether. Individuals with liver problems or liver diseases, such as cirrhosis or liver failure, should avoid oil consumption. The reason is that MCTs are primarily processed in the liver, and impaired liver function may not efficiently metabolize these fats, leading to potential complications.

Additionally, people with malabsorption issues, particularly conditions like chylomicronemia syndrome or abetalipoproteinemia, should refrain from using MCT as they may have difficulty digesting and absorbing these fats.

Individuals with allergies to coconuts or palm-derived products should avoid MCT, as it is commonly derived from coconut or palm kernel oil.

It’s important to note that MCT oil is highly calorie-dense, and excessive consumption may lead to weight gain if not accounted for in the overall daily calorie intake.

As with any dietary supplement, it is crucial for pregnant or breastfeeding women to consult with a healthcare professional before using MCT oil to ensure its safety during this period.

If you have any specific health conditions or concerns, it’s advisable to consult with a healthcare professional or registered dietitian before incorporating MCT oil into your diet to determine whether it’s suitable for your individual health needs.

Does MCT Oil Reduce Belly Fat?

The claim that MCT oil specifically reduces belly fat is not supported by robust scientific evidence. While MCT oil has gained popularity for its potential health benefits, including its role in promoting ketosis and providing a quick source of energy, its impact on targeted fat loss, especially in the abdominal region, is not well-established.

Fat loss occurs when there is a sustained caloric deficit, meaning you burn more calories than you consume. While MCTs are a type of fat that can be converted into ketones and used as an energy source, they still contribute to overall caloric intake. Consuming MCT without considering its caloric content may hinder weight loss efforts rather than promote them.

Research on MCT and fat loss has primarily focused on overall weight loss rather than spot reduction of belly fat. Some studies suggest that MCTs may modestly increase energy expenditure and fat oxidation compared to long-chain triglycerides (LCTs), but the effect on body composition remains inconclusive.

To effectively reduce belly fat or achieve weight loss, a comprehensive approach that includes a balanced diet, regular physical activity, and a sustainable calorie deficit is recommended. While MCT oil can be a part of a healthy diet, it should not be viewed as a magic solution for belly fat reduction. As with any dietary changes or supplements, it’s essential to consult with a healthcare professional or registered dietitian to develop a personalized and evidence-based approach to achieve your weight loss goals.

What is Emulsified MCT Oil?

Emulsified MCT Oil is like the cool kid in the world of dietary supplements. So, what makes it special? Well, it’s essentially a fancy version of regular MCT oil that has been through a process called emulsification. Picture this: tiny MCT oil droplets are mingling with a water-based solution, thanks to some helpful emulsifying agents like lecithin from soy or sunflower.

Why does this matter? For starters, it makes the MCT oil way more friendly with liquids. No more weird separation issues – emulsified MCT oil blends smoothly into drinks. Think of it as an upgrade for your beverages, giving them a creamy texture without the oil slick on top.

But wait, there’s more! Emulsification isn’t just about better mixing; it also jazzes up the MCTs themselves. These medium-chain triglycerides, known for their snappy conversion into energy, get a boost in bioavailability. Translation: your body can grab onto them more easily, making it a quicker ticket to the energy party.

This emulsified magic is especially handy if you’re into ketogenic diets. You can effortlessly sneak emulsified MCT oil into hot or cold drinks, keeping your macros in check. Plus, with MCTs swiftly turning into ketones in the liver, your brain and muscles get a snappy energy kick.

Of course, before you dive into the emulsified MCT oil trend, it’s wise to chat with a healthcare pro. They can help you figure out if it’s the right fit for your lifestyle and health goals. So, in the world of dietary supplements, emulsified MCT oil is like the popular kid that brings both style and substance to the party.

Is MCT Oil Real or Fake?

MCT oil, short for medium-chain triglyceride oil, is undeniably real and has gained popularity for its purported health benefits backed by scientific research.

Derived from coconut oil or palm kernel oil, MCT oil primarily consists of medium-chain fatty acids, namely caprylic acid (C8) and capric acid (C10). Unlike long-chain fatty acids found in most dietary fats, MCTs are rapidly absorbed and metabolized by the liver, where they are converted into ketones, serving as a quick and efficient energy source.

Numerous studies have investigated the potential health effects of MCT oil, particularly its role in weight management. Research suggests that MCTs may increase satiety and energy expenditure, leading to reduced calorie intake and enhanced fat oxidation. This mechanism has led to the incorporation of MCT oil into ketogenic diets, where it aids in achieving and maintaining ketosis.

Furthermore, MCT oil has been shown to have beneficial effects on metabolic health. Studies indicate that MCTs may improve insulin sensitivity, thereby helping regulate blood sugar levels. Additionally, MCT oil supplementation has been linked to lower levels of circulating triglycerides and cholesterol, contributing to cardiovascular health.

Moreover, MCT oil has garnered attention for its potential cognitive benefits. Ketones derived from MCT metabolism can cross the blood-brain barrier, providing an alternative fuel source for the brain. Research suggests that MCT oil supplementation may improve cognitive function, particularly in individuals with neurological disorders such as Alzheimer’s disease.

It’s important to note that while MCT oil offers promising health benefits, its consumption should be mindful of dosage and individual tolerance. Excessive intake of MCT oil may lead to gastrointestinal discomfort, including diarrhea and abdominal cramps, due to its rapid digestion.

In summary, MCT oil is a real product with scientifically supported health benefits. Its unique metabolic properties make it a valuable dietary supplement for weight management, metabolic health, and cognitive function. However, like any supplement, it should be used judiciously and as part of a balanced diet. Individuals considering MCT oil supplementation should consult with healthcare professionals to determine appropriate dosage and assess its suitability based on individual health status and goals.

Final Words

Onnit is one of the best products I have tried. It is not the best, though. That distinction is reserved for Perfect Keto. 

Perfect Keto is made from Caprylic acid (C8), considered to be the best type of MCT because it converts into ketones more efficiently than other types of MCT. 

If you purchase Perfect Keto Oil and other Perfect Keto products from my site, you get a 15% off discount.

Perfect Keto Mct

#1 Best Alternative

  • Easy to mix
  • It’s Vegetarian and Paleo-friendly
  • It Helps Stick to Your Keto
  • Awesome Taste
Mct oil Perfect Keto