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Maximuscle Promax Protein Powder
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Maximuscle Promax Protein Powder

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RRP From £34.99
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Maximuscle Promax Lean contains 25 g of BioMax True Protein; our unique blend provides high-quality protein to support your lean muscle goals. Promax Lean is a high protein, low fat and low sugar shake to complement your daily diet.

The benefits of Maximuscle Promax Lean

For individuals looking for muscle development - protein is the key. Maximuscle Promax Lean offer a convenient way to boost the protein content of your diet; supporting your goal when temptation threatens to hamper your progress.

What makes Maximuscle Promax Lean different?

Maximuscle Promax Lean has been nutritionally tailored to meet your training needs. Maximuscle Promax Lean is newly formulated with 25 g of BioMax True Protein, a blend of whey protein and milk protein (casein) providing both fast and slow acting protein. Promax Lean can be used following exercise or in between meals to provide additional dietary protein.

Typically, food protein concentrations are theoretically calculated based on the total nitrogen content, but this can cause some variances in the derived protein level. Maximuscle have gone one step further by validating the protein concentration in Promax Lean by comparing the weight of the individual amino acids with the calculated factored amount, qualifying this as BioMax True Protein. We guarantee that every serving of Promax Lean provides 25g of high-quality BioMax True Protein to help support the growth and maintenance of lean muscle.

For Maximuscle Athletes and Ambassadors, Progain is the preferred choice - they can go into competition with peace of mind, knowing that all of Maximuscle products are screened for banned substances and accredited by the Informed-Sport programme.

Maximuscle only use proven, reliable ingredients with known scientific benefits in our products.

Stacking support

Promax Lean is the ideal product range to support your muscle maintenance and development by being high in protein. As an alternative, why not try one of our newly formulated Promax Lean bars; great to keep in your gym bag for when the need arises.


Nutritional Info
Typical Values
Per 100g
Per serving
Energy, kJ
Per 100g 1706
Per serving 597
Energy, kcal
Per 100g 408
Per serving 143
Magnesium, mg
Per 100g 350 (*67%)
Per serving 88 (*24%)
Fat, g
Per 100g 8.3
Per serving 2.9
- of which saturates, g
Per 100g 5.7
Per serving 2.0
Carbohydrate, g
Per 100g 6.5
Per serving 2.3
- of which sugars, g
Per 100g 4.6
Per serving 1.6
Fibre, g
Per 100g 1.8
Per serving 0.6
Protein, g
Per 100g 71.4
Per serving 25.0
Salt, g
Per 100g 0.9
Per serving 0.3
Per 100g 20.0
Per serving 7.0
Leucine, g
Per 100g 9.3
Per serving 3.2
Isoleucine, g
Per 100g 5.4
Per serving 1.9
Valine, g
Per 100g 5.3
Per serving 1.8
Glutamine, g
Per 100g 11.7
Per serving 4.0

BCAAs & Glutamine

Maximuscle’s PROMAX protein formula naturally provides 7g of the Branched Chain Amino Acids (Leucine, Isoleucine and Valine) in every serving. BCAAs are considered essential amino acids as the body cannot produce them itself and are required in our diets. Every serving also contains naturally occurring glutamine, the most abundant amino acid in the muscle.


Every serving of PROMAX contains a source of magnesium, which contributes to muscle function and reducing tiredness and fatigue.

Low in Fat, Sugar & Salt

Every serving of PROMAX is low in fat, sugar and salt.


Every serving of Promax is also a source of magnesium which contributes to your bodys electrolyte balance and to reducing tiredness and fatigue.

Screened and effective

Every batch of Promax is screened for banned substances and is registered with the Informed-Sport.

Suitable for vegetarians

England, Wales, Scotland, Northern Ireland

Standard Delivery
Is FREE on orders over £40 and will be delivered in 1-4 working days. Deliveries under £40 will be charged at £3.95

Next (Working) Day Delivery
Costs £5.95. If you order by 2pm Mon-Fri, we will send your parcel by DPD for next working day delivery. A signature is required. Some parts of the U.K (e.g. Shetland Islands, Channel Islands) do not offer next (working) day delivery, so please allow 3-4 working days instead.

Saturday Delivery Options
Costs £12.00. If you order by 2pm Monday-Friday, we can send your parcel by DPD for exclusive Saturday delivery. Please note a signature is required. Some parts of the U.K (e.g. Shetland Islands, Channel Islands) do not offer Saturday day delivery, so please allow 3-4 working days instead.

Predict - Our One Hour Delivery Window
If you provide your mobile number at the checkout our courier DPD will provide you with a one hour delivery window so you don't have to wait in all day for their parcels.

Channel Islands

There is a shipping fee of £8.50 when shipping to Channel Islands.


There is a shipping fee of £10.50 when shipping to Ireland.

Head to our delivery information page for more information.

Money Back Guarantee

We are so confident of our products’ effectiveness that we guarantee it. Just use the products as instructed on the label for 30 days, all the while maintaining a sensible training regime and a healthy diet. If you are not satisfied with the results, please send the goods back to us in the original packaging to us within 40 days, including your training and meal plans where we will review and determine if you qualify for a refund.

Please note: Short life products cannot be refunded/exchanged

Returns Process

Step 1
Fill in the reverse paper of your order invoice that accompanied your order. 

Step 2
Clearly label and pack your returned products to our address

Step 3
Send the package using your choice of courier. 

More information can be found by on our returns policy.

Alan Clark 10/10
I have recently gone back to using Maximuscle as part of my supplement stack. Having read an article on Protein spiking and how some companies trick the consumer into thinking they are getting a specified amount of protein, I was shocked at the poor quality of protein powder I was using. I decided to return to maximuscle as they state the full list of ingredients on the label and more importantly the amino acid profile which is where the aforementioned protein spiking comes in (no pointless glycine or taurine here!). You really do get what you pay for and the Promax range is worth every penny.

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