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A pouch of The Lean Protein - a whey protein powder developed by Innermost
A pouch of The Lean Protein - a whey protein powder developed by Innermost
A pouch of The Lean Protein - a whey protein powder developed by Innermost
Ambar Driscoll holding a pouch of The Lean Protein - a whey protein powder developed by Innermost
Pouches of The Lean Protein - a whey protein powder developed by Innermost
The Lean Protein powder - a whey protein powder developed by Innermost

The Lean Protein

Get lean the right way.

Our protein blends won’t make you bulky. This one was actually crafted to help you slim-down. We want to make it easier to reach your ideal weight so we packed it with ingredients to support fat metabolisation. Formulated to encourage healthy fat-loss, reduce cravings, and support muscle growth and repair. A smarter way to lean-up.

The Lean Protein

Smooth chocolate flavour | 600g

The Lean Protein

Creamy vanilla flavour | 600g

£29.95 £29.95

Product Highlights

User Trials

After one month of using The Lean Protein...

> 88% of people said they had fewer cravings.

> 85% of people said they lost weight.

> 86% of people said their skin and nails were stronger.

*Results based on 68 participants surveyed over a 30 day period. Participants were requested to log a diary and complete a survey at the end of the month.

Active Ingredients

For every serving of The Lean Protein: Protein (29g), Inulin (1g), Acetyl L-Carnitine (750mg), Pomegranates (500mg), Yerba Mate (500mg), Bilberries (250mg).

Scroll down to learn about these ingredients and how they benefit you.

Per: 40g 100g
Energy 626 kJ 1,565 kJ
Calories 148 kcal 370 kcal
Protein 29g 74g
Carbohydrates 4.5g 11.1g
of which sugars 1.1g 2.7g
Fats 1.2g 3.0g
of which saturates 0.4g 1.0g
Dietary fibre 1.5g 3.8g
Sodium 0.08g 0.20g

Allergens: Milk (whey). 
Other ingredients: Natural flavours only. Guar gum, which is a GMO-free, gluten-free, natural fibre that comes from the guar bean to give our shakes a creamy texture. We use sunflower lecithin instead of soy lecithin, which is the only kind of lecithin that can be obtained raw and chemical-free using a cold press system similar to that used with olive oil. We use sucralose as it is the most widely tested low-calorie sweetener and approved by all major food standard agencies in the world.

How And When To Use

A nutritious addition to your diet to help meet your daily nutrient needs or a must-have post-workout refuel that can be taken ideally within 45 minutes of exercise.

Directions: Add up to 40g (4 scoops) to 250-350ml of water or milk and shake. Adjust amount of liquid for your desired level of sweetness and thickness. Best served cold. Can also be used to make smoothies and baked into healthy snacks.

Works Well With: The Define Booster to further assist with metabolising fat and supporting energy levels.

Need some help getting leaner?

So did we. 

That’s why we created The Lean Protein. Just like you, we were sick of being marketed products that told us to stop eating, or simply didn’t work. A recent survey found that almost half of UK adults had tried to lose weight in the last year, so we knew that this was one of the biggest health concerns people had. 

And if you’ve found yourself in this camp, we’re with you. We acknowledge that it’s totally ok to want to lose fat, albeit in a healthy, controlled way. No fad diets, no restrictions, no nonsense. Formulated by leading nutritionists, The Lean Protein is a genuinely delicious protein powder that is the perfect partner to help you get lean, tone up, and lose body fat. Because your goals are achievable.

Is this a meal replacement?

Our protein blends are not designed to be consumed as a meal replacement, but instead as a healthy addition to a balanced diet. They’re great as a post-workout refuel to start the recovery process - or just whenever you’re feeling peckish! If you’re looking for something filling that keeps you going until your next meal, consider blending up a protein smoothie with some healthy fruit and vegetables. Sign-up to our email newsletter and we’ll send over some recipes.

How often should I take it?

At Innermost we believe in a food-first approach. For that reason, we recommend taking The Lean Protein as part of a balanced diet ideally post-workout or during your day as a healthy snack to meet your protein needs. You should always aim to meet most of your nutrient needs through the food you eat but having a high-quality protein powder like The Lean Protein, which contains additional ingredients to support your goals can be an efficient way to help fill gaps in your diet.

Does it have a complete amino acid profile?

Yes! The Lean Protein provides a complete amino acid profile per serving as follows: Leucine (2.9g), Isoleucine (1.9g), Valine (1.8g), Alanine (1.6g), Arginine (0.7g), Aspartic Acid (3.4g), Cystine (0.7g), Glutamic Acid (5.5g), Glycine (0.4g), Histidine (0.5g), Lysine (2.8g), Methionine (0.7g), Phenylalanine (0.9g), Proline (1.7g), Serine(1.5g), Threonine (2.0g), Tryptophan (0.4g), Tyrosine (0.7g). 

Will The Lean Protein make me bulky?

No! ‘Bulkiness’ is a result of continuous muscle training usually employing heavy weights and a specific high-calorie diet, and can take a lot of effort and time. In reality, protein keeps you fuller for longer so it can actually help you get more toned and defined alongside a sensible diet and physical activity.

Nutrient heavy and evidence-based products, rather than pure fluff. The Lean Protein features inulin, a substance linked to lower levels of visceral fat (the killer kind...), along with high quality protein to aid muscle repair and recovery, yerba mate for energy, and pomegranate and bilberries for an antioxidant rush. Basically, a research based post-workout beverage of dreams.

Stop cravings in their tracks

We only use ingredients that have a visible supply chain to ensure what we say is in the product is the only thing in the product. Research-backed natural ingredients, nootropics and adaptogens scientifically proven to reduce cravings, encourage sustainable fat-loss, support muscle repair and speed up recovery.

Per Serving:

Protein (29g): The building block of bones, muscles, hair, skin, and nails, this blend of dairy-based whey concentrate and isolate contains all the essential amino acids your body needs for repair, recovery and muscle development. References > 12.

Inulin (1g): Advanced research in weight management emphasises recognising the importance of our gut as a metabolic organ. Inulin is a prebiotic fibre that encourages growth of good gut bacteria linked to lower levels of fat. References > 34.

Acetyl L-Carnitine (750mg): A non-essential amino acid necessary for transporting fat to the body’s power-generating mitochondria. Without it, 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. References > 56.

Pomegranates (500mg): This fruit has sparked interest in recent years largely due to its punicalagin and ellagic acid content. These compounds are retained in the gut where they encourage the growth of good gut bacteria linked to lower levels of fat. References > 78.

Yerba Mate (500mg): Dried leaves of an evergreen holly tree native to South America. An incredibly high antioxidant content and has been shown to have possible effects in the area of weight management, which could be due to it helping delay intestinal absorption of dietary fat. References > 910.

Bilberries (250mg): Belonging to a class of natural bioactives with wide-reaching health benefits, including improving cardiovascular health, glucose control and inflammation. These dark berries are rich in antioxidants and resveratrol, which are seeing increased use for their purported anti-aging properties. References > 1112.

Learn More: Your Gut Could Hold The Secret To Getting Leaner Learn More: How Protein Can Help You Lose Weight

Why it's special


Protein is a macronutrient that’s necessary for healthy muscles, skin, nails and bones. Whey protein concentrate and isolate are loaded with the essential amino acids that your body needs to build muscle mass efficiently. As a high-quality source of protein, whey also lowers blood pressure, decreases inflammation and reduces cravings.


Pomegranates, yerba mate, bilberries and inulin are active ingredients that provide wide-reaching health benefits. Inulin and pomegranates have properties that encourage the growth of good bacteria, while bilberries and yerba mate are rich in antioxidants. These bioactives have been shown to positively affect weight management through their different properties.

Functional Ingredients

Acetyl l-carnitine is functional for both your physical and mental health. By transporting fatty acids to the mitochondria, the supplement is effective when it comes to improving memory, increasing endurance and reducing fatigue. It allows your body to burn fat for energy, so that your workouts are optimised for muscle health and development.

When should I use the product?

Ideally, post-workout to start the repair and recovery process. However, you can also use it to make a quick nutritious shake or smoothie anytime of the day, or in your porridge or oatmeal to top up your daily protein intake. The protein blend is also versatile enough to bake into high-protein snacks.

How long will the product last?

This depends on how often you use the product. Typically a pouch of our protein blends will last around a month or so. If you're using it every day and also adding it to porridge and smoothies, you may run out sooner. We have a subscription option, which saves you money and ensures you'll never run out.

What does it taste like?

All our protein blends come in either creamy vanilla or smooth chocolate. We spent months perfecting the flavour systems to create our own completely custom flavours that you won't get anywhere else. The flavours are characterised by complex layers of vanilla and cocoa, with subtle notes of caramel and biscuit. We only use natural flavours and you can adjust the sweetness down or up by using more or less liquid.

What sort of testing do you do?

We go over and above to ensure you get the best quality and safest products possible. We only use ingredients that have a visible supply chain, and our manufacturing facilities are approved to the highest regulatory standards. Once we receive ingredients, we batch test every single one before it gets approval to go into the manufacturing process. That isn’t technically an official requirement but it’s something that we think should be.

Customer reviews

Customer Reviews

Based on 148 reviews
Alice M
Great product, great taste

I love this protein power, it has a great taste and blends well. I tend to through in a bit of banana or some berries to mix it up a bit or a teaspoon of peanut butter. Its ideal post workout and works well for me. I would recommend to others looking for a weight friendly protein power, with a great taste from a great company,

Love it

Best tasting vanilla protein I've had. I mix it with oat milk, frozen blueberries and some peanut butter - it's incredible.

Neave Andrews Fryer
A bit watery

Purchased vanilla lean protein. Quite sweet but pleasant tasting. Also more watery than any Protein shake I’ve previous had, even with the least amount of recommended water.


Tasty, easy to incorporate and effective.
Makes especially good chocolate pancakes!
Definitely a sound purchase

Fantastic product

My favourite product. Tastes delicious. I add to porridge in the morning and to smoothies after a workout. Highly recommended this product.

The best tasting protein...

I can honestly say that this is the nicest tasting protein that I have EVER tried + it is very affordable for what you get. I first purchased this when I was a member at F45 and have never looked back since - best protein, best ingredients and the best brand! Whey protein usually makes me feel bloated, but Innermosts lean-protein powder is great... no bloat and protein that tastes like a vanilla milkshake. P.S. its great for making 'proats' in the morning (protein oats). Give it a try!