Optimum Nutrition Serious Mass 5.45kg
For those who are truly committed to building size, the Optimum Nutrition Serious Mass 5.45kg tub is the long-term solution. The same legendary formula — 1,250 calories and 50g of blended protein per serving — but in a format that lasts, with 16 full servings from a single tub. Stock up, stay consistent, and let the results do the talking.
The tri-source protein blend of whey concentrate, caseinate, and egg albumen ensures both immediate and sustained amino acid delivery. Over 250g of carbohydrates with no added sugar provides the caloric surplus needed for serious mass, while creatine, glutamine, glutamine peptides, and 25 vitamins and minerals deliver comprehensive recovery and micronutrient support.
- 1,250 calories per serving — built for hard gainers
- 50g protein — whey concentrate, caseinate & egg albumen blend
- 250g+ carbohydrates | No added sugar
- Enhanced with creatine, glutamine & glutamine peptides
- 25 vitamins and essential minerals
- 5.45kg — 16 servings (334g per serving)
- Best consumed between meals, post-workout, or before bed
Recommended Use:
Add one serving to your preferred amount of water or milk and shake well. New users should start with half a serving to assess tolerance.
Allergens: Contains Milk, Egg, Soy, Wheat (Gluten). May contain nuts and peanuts.
Delivery estimates are from the date of dispatch, NOT the date of purchase. All orders are subject to a two days handling time.
We mainly use Royal Mail for all deliveries, however depending on order size and availability, we also use Parcel Force/ DPD as our main courier partners.
We will email confirmation of your order on receipt and for those orders being delivered by a courier company you will receive further delivery update emails via the courier company directly (usually with a delivery slot). Please leave your mobile number at ordering stage if you would like to receive notifications.
Should you not be at home to receive your delivery, our couriers will try again the following day or give you the option to rearrange a delivery time/ collection point.
Should you not be in to sign/ receive your delivery, please let us know via email info@gymsupplements.co.uk and we will arrange to leave your parcel with a neighbour if it is possible to do this.
Should you choose to call, please do not leave a voicemail. Instead, please email us along with your order number.
If you leave a signed authorisation note the couriers will leave your parcel in an alternate place at your delivery address however this will be entirely at your own risk.
Delivery Rates;
- Free Delivery on all orders over £70+
- £4.99 for all orders below £70
While we work hard to ensure all orders are dispatched as quick as possible, sometimes it is out of our hands & even the most reliable couriers can end up having delays.
In this instance, please get in touch with us via email and we will reach out to the courier for an update.
