Bulletproof Brain Octane Oil Australia | C8 MCT 946ml Keto
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100% Caprylic Acid (C8) MCT Oil from Coconut · 946mL (32 fl oz)
Bulletproof® Brain Octane® Oil
A 100% pure caprylic acid (C8) medium-chain triglyceride oil made from coconuts. Odorless, flavourless, and liquid at room temperature.
946mL bottle · ~63 servings (1 tablespoon each) · No lauric acid, no C10, no fillers.
Key Points
- 100% caprylic acid (C8) — the shortest of the medium-chain triglycerides, isolated to a single fatty acid
- Made from coconut oil — the C8 fraction is separated from the rest of the coconut oil through fractional distillation
- Odorless and flavourless — blends into hot and cold drinks, dressings, and cooking without altering taste
- Liquid at room temperature — may cloud or thicken in cold storage (normal — returns to liquid at room temperature, does not affect quality)
- Ketogenic-friendly — suits low-carb and ketogenic dietary patterns; pure fat, zero carbohydrate
- Fits the Bulletproof Coffee recipe as the MCT oil component
What It Is
Brain Octane Oil is a medium-chain triglyceride (MCT) oil containing only C8 (caprylic acid). Coconut oil naturally contains a mix of medium-chain fatty acids — C8 (~8%), C10 (~7%), C12 lauric acid (~48%), and other longer-chain fats. Bulletproof isolates the C8 fraction through fractional distillation, giving a product that is 100% C8 caprylic acid triglyceride.
Because it contains only C8 — not C10 or lauric acid — it’s a shorter, more concentrated version of what standard MCT oils provide. It has no colour, no odour, and no taste, making it easy to mix into a wide range of foods and drinks.
No added vitamins, no fillers, no preservatives. The bottle contains one ingredient: caprylic acid MCT oil.
Sourcing & Processing
Source: Coconut oil, from responsibly harvested coconuts.
Processing: The C8 caprylic acid fraction is separated from the rest of the coconut oil through fractional distillation (heat + pressure differentials, no chemical solvents). The result is a colourless, odourless, flavourless liquid oil.
What’s left out: Lauric acid (C12), C10 caprate, longer-chain saturated fats, and non-triglyceride components. This is not coconut oil — it’s the C8 fraction of coconut oil.
Product Specifications
| Format | Liquid oil |
| Bottle Size | 946mL (32 fl oz) |
| Composition | 100% caprylic acid (C8) medium-chain triglyceride |
| Source | Coconut oil |
| Serving Size | 1 tablespoon (15mL) |
| Servings per Bottle | ~63 |
| Kilojoules per Serve | ~509 kJ (122 kcal) — pure fat, zero carbohydrate |
| Colour / Taste | Colourless, odourless, flavourless |
| Packaging | BPA-free HDPE bottle |
| Storage | Store at room temperature away from direct sunlight. Cloudiness or thickening in cold conditions is normal and reverses at room temperature. |
How to Use
Because it has no flavour or colour, Brain Octane blends easily into a wide range of foods and drinks:
- In coffee — as the MCT oil component of the Bulletproof Coffee recipe (see below)
- In smoothies — add 1 tablespoon per serve; blends without altering flavour
- In salad dressings — substitutes for other oils; whisks well with vinegar and mustard
- Drizzled on food — over steamed vegetables, soups, or fatty meats after cooking
- Cold uses — suitable for cold or lukewarm dishes; not recommended for high-heat frying (smoke point is lower than long-chain cooking oils)
Start small. If you’re new to MCT oil, begin with 1 teaspoon (5mL) per day and increase gradually over a week or two. Taking too much too quickly is a common cause of digestive discomfort — MCTs are absorbed differently from other fats, and the gut may need time to adapt.
The Bulletproof Coffee Recipe
"Bulletproof Coffee" is the preparation method for which Brain Octane was originally created. It combines brewed coffee with grass-fed butter (or ghee) and MCT oil, blended to a creamy consistency. It’s a high-fat option that many people use as a breakfast replacement on ketogenic or low-carb dietary patterns.
Bulletproof Coffee Preparation
- Brew 2 cups of Bulletproof coffee using the method of your choice
- Combine with 2 tablespoons of unsalted grass-fed butter (or grass-fed ghee for a dairy-free option)
- Add 2 tablespoons of Brain Octane Oil (this product)
- Blend in a high-speed blender (or use an Aerolatte® frother) until a creamy head of foam forms
- Pour and drink while hot
Treat it as a meal rather than a beverage if using it as a breakfast replacement. The fats give the drink a creamy texture and a higher caloric content than plain coffee.
Good to Know
How is this different from coconut oil?
Coconut oil is roughly 62% medium-chain triglycerides mixed with longer-chain fats; only about 8% of it is C8 caprylic acid. Brain Octane isolates the C8 fraction only. So it’s more concentrated per tablespoon and behaves differently when digested. It’s also liquid at room temperature and flavourless, whereas coconut oil is solid below ~24°C and tastes distinctly of coconut.
How is this different from Bulletproof MCT Oil?
Brain Octane (this product) is 100% C8 caprylic acid. Bulletproof MCT Oil is a blend of C8 and C10 (capric acid), which is closer to a standard MCT oil. The pure-C8 product is more concentrated (per tablespoon) and priced higher; the C8+C10 blend is more economical if you’re using MCT oil in larger volumes.
Why does it get cloudy in the fridge?
MCT oil can thicken or cloud when cold. This is normal. Once returned to room temperature the oil clears and thins again. This does not affect the quality or shelf life. The 3-pack option is a bulk-buy at a discount if you use larger volumes regularly.
Can I cook with it?
Best used at low-to-moderate heat or at room temperature. The smoke point is lower than long-chain cooking oils like olive or avocado oil, so it’s not the best choice for high-heat frying or searing. It’s well suited to salad dressings, drizzling on finished dishes, blending into drinks and smoothies, or adding to warm (not boiling) soups.
Which size should I get?
This 946mL bottle suits regular users going through it over 1–2 months. The 414mL bottle is a smaller trial size. The 90mL travel bottle is for travel or single-user portioning. For heavy users, the 3-pack option (available as a variant of this product or as a standalone 3-pack listing) offers a bulk discount.
I’ve tried the others but I always come back to this brand. You can’t mess with the morning coffee.
The best!!
Great
I just love starting my day with Bullet proof coffee. Adding MCT oil to my coffee ensures that my mind is sharp and engaged. It works! thank you
I started taking the Bullet proof Brain Octane Oil and feel its benefits. Mainly improving my brain fog in the morning. Its tasteless and odorless and packs a punch. Ordering and delivery have always been a breeze. I would recommend this product in your coffee.
Always good service and excellent quality products…this Oil gives me great clarity …recommend it
One of the best C8 MCT oils on the market.
My husband can't live without this MCT oil. Completely life changing. Bulletproof coffee in the morning with a tablespoon of Brain Octane keeps his energy stable until well into the afternoon. Best value in Aus at Optimoz!
I highly recommend these products as they are of the superior quality. They match with the described qualities of these products.
I really love this product, it has helped with my gut issues & brain fog. I do recommend taking small doses first & bulding it up slowly as they suggest otherwise you’ll see yourself in the toilet non stop (unless that’s what you want) haha overall ace product
Have been using this product for years. Always great quality
My bulletproof mct oil is part of my daily routine, helps with my brain fog and focus. Great buy.
This is so easy to build into my daily routine :)
Quick and safe delivery
My first time using this product and I heeded the suggestion to have a small dosage initially. I definitely feel the difference in my clarity of thought and energy levels.
Amazing for my bullet coffees
One the best products in its market
It came just in time
I believe the MCT oil s beneficial to my well being
I've been ordering and enjoying BulletProof Coffee and Brain Octane or MCT oils for 8 years. My most recent order went astray (cheers Aramex, will never use you again) but Optimoz were great. They promptly replaced the order, held it back so I could add some Brain Octane Oil that had just come into stock, and sent it to me in New Zealand - this time using FedEx / TNT and it arrived exactly on time. Great service, much appreciated.
I have it every day in my morning smoothie—it gives me a nice boost of brain energy.
Bulletproof® Brain Octane C8 MCT Oil - 946ml
I have been using Bulletproof Brain Octane in my coffee for over 10 years now! I have tried others but nothing compares with its taste (no taste at all!) or its benefits. Sustained mental focus and energy every morning… wouldn’t do my coffee any other way!
All good
Really helpful in getting to the ketone levels I need.
Love this product! Have it everyday with my coffee.
Great!
I’ve been using Brain Octane for years. Thanks Optimoz for being a one stop shop for human optimisation 👌
Quick delivery and no damage on package. Does the job very well. I don’t feel hungry throughout the day
Loving what it does for my wife’s mental health and her well being.
Thanks.
I’ve never had such quick delivery in anything that I order. Thanks very much
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