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A pouch of The Define Booster - a nutritional supplement developed by Innermost
A pouch of The Define Booster - a nutritional supplement developed by Innermost
A pouch of The Define Booster - a nutritional supplement developed by Innermost
Sophie Apollonia smiling and looking confident for Innermost
Pouches of The Define Booster - a nutritional supplement developed by Innermost
Charlie Auterac looking straight at the camera for Innermost
The Define Booster white powder- a nutritional supplement developed by Innermost

The Define Booster

Definition done properly.

To decrease body-fat you need the right nutrients. That’s where this product comes in. The most popular non-stimulant fat-loss supplement in the world. It works by ensuring your body is metabolising fat efficiently. Live life in High Definition.

The Define Booster

Unflavoured with a slightly bitter taste.

£24.95 £24.95

Product Highlights

How to use

To be taken during the day, once a day.

Directions: Mix 2g (1 flat teaspoon) with around 200ml water or juice in your Innermost shaker bottle, or simply add 2g to your pre or post-workout protein shake. Unflavoured acetyl l-carnitine does have a bitter and citric taste so mixing it with orange juice or lemon water works well.

Works Well With: The Tone Capsules to raise your metabolism and support healthy fat-loss.

I’ve never been able to see muscle definition…


Gaining definition can seem like an unattainable goal.

But it doesn’t have to be. If you’ve been working hard to see results, and just want an extra push in the right direction, then look no further.

The Define Booster is one of our most popular products for a reason. Formulated by leading nutritionists, it's been crafted to metabolise fat for energy, support endurance, and even boost memory and learning. Start seeing the lean muscle definition you’re looking for. Because reaching your fitness goals doesn’t have to be impossible.

Innermost is awarded The Game Changer Award. The sands are shifting in the supplements industry. One brand stands out most, Innermost. We now expect more from our supplement products and Innermost is well ahead of the curve.

It’s what’s inside that matters.


Natural ingredients, nootropics and adaptogens, with clearly communicated benefits. Combined to help you think, feel, and perform your best.

Per Serving:

Acetyl L-Carnitine (2g): One of the most popular non-stimulant fat-loss supplements on the market today. A non-essential amino acid found naturally in the human body, necessary for transporting fat to the body’s power-generating mitochondria for use as energy during physical activity. Without carnitine, we wouldn’t be able to use fat effectively as a source of energy, which could result in the body having to break down muscle instead. The key benefit of the acetyl form of carnitine is that it can cross the blood-brain barrier to improve mood, learning and memory as well.

Allergens: None. 

Made for you.


We believe in the power of smart nutrition and enabling conversation (that’s where it all starts). But most of all, we believe that better personal wellness is for everyone, whoever and wherever you are on your journey.

We spent time finding out what you care most about when it comes to your health and fitness. We then turned to cutting-edge science and research, as well as best practices from Ayurvedic and Asian medicine, to create products that would give you the results you told us you were looking for. Free from additives, artificial colours, fillers and GMO nasties.

Love this supplement. I have a teaspoon every day and feel it's really boosting my metabolism and giving me a mental lift!

Lucy A, Verified Customer

Customer Reviews

Based on 12 reviews
50%
(6)
33%
(4)
17%
(2)
0%
(0)
0%
(0)
J
J.T.
Strong taste - very bitter
D
D.M.
Seeing improvements
M
M.J.
Too early to tell maybe?
O
O.D.
Good product
H
H.M.
Good Product
Glad to hear you're benefitting from the product. While the product is unflavoured, it does have a citric-like taste. To make it work for you, try mixing with lemon water or orange juice. Anything that has an acidic like taste will work.
l
l.a.
Sharp sharp
v
v.D.
Good product
R
R.B.
Energy!
A
A.W.
Definitely works
D
D.N.
Very tasty