& FREE Returns
Return this item for free
  • Free returns are available for the shipping address you chose. For a full refund with no deduction for return shipping, you can return the item for any reason in new and unused condition.
  • Learn more about free returns.
FREE delivery Friday, August 19. Details
Or fastest delivery Thursday, August 18. Order within 9 hrs 14 mins. Details
In stock.
[{"displayPrice":"£32.95","priceAmount":32.95,"currencySymbol":"£","integerValue":"32","decimalSeparator":".","fractionalValue":"95","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"KR7opkrepThkB5ILk7hkeXzsbozQGjQA09nBYpVOoPWqJHWMc3%2F8nqC6hm9I4S5xp80U8XWVePFNX6%2FpVKUx144qgKUFwjo9zdXAsN7cFh0QCARqE1Xa6d%2BA4QB0Fy0d","locale":"en-GB","buyingOptionType":"NEW"},{"displayPrice":"£29.66","priceAmount":29.66,"currencySymbol":"£","integerValue":"29","decimalSeparator":".","fractionalValue":"66","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":null,"locale":"en-GB","buyingOptionType":"SNS"}]
££32.95 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
££32.95
Subtotal
Initial payment breakdown
Delivery cost, delivery date and order total (including tax) shown at checkout.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Dispatches from
Amazon
Sold by
Amazon
Dispatches from
Amazon
Sold by
Amazon
Return policy: Returnable within 30 days of receipt
Item can be returned in its original condition for a full refund or replacement within 30 days of receipt
Optimum Nutrition Serious... has been added to your Basket
Save 10% now and up to 15% when you schedule repeat deliveries.
• No fees
• Cancel anytime

Unlock 15% savings

Save 15% when you schedule repeat deliveries of 5 or more products in one delivery to one address. Currently, you'll save 10% on your Oct 18 delivery.

Choose how often it's delivered

From once every two weeks to once every six months

Skip or cancel any time

We'll send you a reminder before each delivery.
Learn more
Get it Friday, 19 Aug
In stock.
Deliver every:
[{"displayPrice":"£32.95","priceAmount":32.95,"currencySymbol":"£","integerValue":"32","decimalSeparator":".","fractionalValue":"95","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"KR7opkrepThkB5ILk7hkeXzsbozQGjQA09nBYpVOoPWqJHWMc3%2F8nqC6hm9I4S5xp80U8XWVePFNX6%2FpVKUx144qgKUFwjo9zdXAsN7cFh0QCARqE1Xa6d%2BA4QB0Fy0d","locale":"en-GB","buyingOptionType":"NEW"},{"displayPrice":"£29.66","priceAmount":29.66,"currencySymbol":"£","integerValue":"29","decimalSeparator":".","fractionalValue":"66","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":null,"locale":"en-GB","buyingOptionType":"SNS"}]
££32.95 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
££32.95
Subtotal
Initial payment breakdown
Delivery cost, delivery date and order total (including tax) shown at checkout.
Dispatched from and sold by Amazon.
Other Sellers on Amazon
Added
£32.95 (£1.21 / 100 g)
& FREE Delivery
Sold by: M&B Bargains
Sold by: M&B Bargains
(13270 ratings)
93% positive over last 12 months
Only 2 left in stock.
Delivery rates and Return policy
Added
£33.25 (£1.22 / 100 g)
Sold by: Monstersupplements
Sold by: Monstersupplements
(3096 ratings)
90% positive over last 12 months
In stock.
Delivery rates and Return policy
Added
£33.99 (£1.25 / 100 g)
& FREE Delivery
Sold by: Protein Bargain
Sold by: Protein Bargain
(2099 ratings)
85% positive over last 12 months
In stock.
Delivery rates and Return policy
Have one to sell?
Loading recommendations for you

Adding to basket...

Added to Basket

Not Added

Item is in your basket

View Basket

Not Added

There was a problem adding this item to your Basket Please try again later.
We do not have any recommendations at this time
Continue shopping

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 8 Servings, 2.73 kg, Packaging May Vary

4.4 out of 5 stars 59,215 ratings

Price: £29.66 (£1.09 / 100 g) £28.01 (£1.03 / 100 g)
Voucher:  
Voucher valid until Saturday, 31 December 2022 or while stocks last.
Note: This item is eligible for FREE Click and Collect without a minimum order subject to availability. Details
Pick up your parcel at a time and place that suits you subject to availability.
  • Choose from over 20,000 locations across the UK
  • FREE unlimited deliveries at no additional cost for all customers
How to order to an Amazon Pickup Location?
  1. Find your preferred location and add it to your address book
  2. Dispatch to this address when you check out
Learn more
Chocolate
2.73 kg (Pack of 1)

Similar item to consider

Enhance your purchase


About this item

  • PACKAGING MAY VARY: New look, with the same trusted Quality!
  • Mass gainer with whopping 1250 CALORIES and 50g of PROTEIN per serving. Contains less than 5g fat!
  • Comes as an instantised powder. Mix with fruit or nut butters for a tasty and calorific post-workout drink or take between meals to ENCOURAGE MUSCLE GROWTH
  • PROUDLY CONTAINS NO ADDED SUGAR! Boasts 24 vitamins and minerals per serving
  • GREAT VALUE FOR MONEY. Serious Mass protein powder delivers a high-calorie content and quality protein at competitive rates
  • Provides calories, ENCOURAGING WEIGHT GAIN and refuels body’s glycogen stores

Frequently bought together

  • Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 8 Se
  • +
  • Warrior, Creatine Monohydrate Powder - 300g - Micronised for Easy Mixing - for Recovery & Performance, Blazin' Berry
  • +
  • Bulk Iconic Shaker Bottle, With Wire Mixing Ball, Clear, 750 ml (Pack of 1)
Total price:
To see our price, add these items to your basket.
Some of these items are dispatched sooner than the others.
Choose items to buy together.
Free Gift

Important information

Safety Information:

Always reseal after use, keep in cool dry place.

Indications:

Add two heaping scoops of Serious Mass to a blender filled with 710 ml of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend for an additional 30-45 seconds.

Ingredients:

Maltodextrin, WHEY Protein Concentrate [MILK], Calcium CASEINATE [MILK], Fat-Reduced Cocoa Powder, Creatine Monohydrate, Flavouring, MILK Mineral Complex, Medium Chain Triglycerides [MILK], EGG Albumen, Sodium Chloride, Dipotassium Phosphate, Vitamin & Mineral Blend (Sodium L-Ascorbate, Ferric Pyrophosphate, D-Alpha-Tocopheryl Acetate, Nicotinamide, Zinc Oxide, Retinyl Acetate, Calcium D-Pantothenate, Sodium Fluoride, Manganese Sulphate, Potassium Iodate, Cyanocobalamin, D-Biotin, Chromium (III) Chloride, Pteroylmonoglutamic Acid, Cholecalciferol, Sodium Selenite, Cupric Citrate, Pyridoxine Hydrochloride, Thiamine Hydrochloride, Phylloquinone, Riboflavin, Sodium Molybdate), Glutamine Peptides [WHEAT GLUTEN], L-Glutamine, Magnesium Oxide, WHEY Powder [MILK], Inositol, L-Ascorbic Acid, Sweetener (Sucralose), Antioxidant (Tocopherol-Rich Extract), Calcium D-Pantothenate, Pteroylmonoglutamic Acid.

Directions:

Mix two heaped scoops of Pro Complex with 12 to 14 oz. of your favourite beverage. Take two to three servings per day or use as recommended by a physician or licensed nutritionist.

Legal Disclaimer

Product should not be used as a substitute for a varied diet. Do not exceed stated recommended daily dose. Keep out of reach of young children. Storage: always reseal after use, keep in a cool dry place.

Disclaimer: While we work to ensure that product information on our website is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our website. All information about the products on our website is provided for information purposes only. We recommend that you do not solely rely on the information presented on our website. Please always read the labels, warnings, and directions provided with the product before using or consuming a product. In the event of any safety concerns or for any other information about a product please carefully read any instructions provided on the label or packaging and contact the manufacturer. Content on this site is not intended to substitute for advice given by medical practitioner, pharmacist, or other licensed health-care professional. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements about products are not intended to be used to diagnose, treat, cure, or prevent any disease or health condition. Amazon.co.uk accepts no liability for inaccuracies or misstatements about products by manufacturers or other third parties. This does not affect your statutory rights.

Product description

Product Description

The transformation is part of our mission to help active individuals better understand OPTIMUM NUTRITION products and how they support their goals. A Serious Mass new formula is now enriched with 3g Creatine per serving to support your performance. Struggling to gain muscle mass? Serious Mass is a quality whey protein powder designed to support muscle building. Help yourself bulk up! With a great range of flavours, the high-protein drink powder from Optimum Nutrition contains 1,260+ calories, 50g of protein, 250g+ of carbohydrates, 3g of Creatine, Glutamine plus 24 vitamins and minerals per serving when mixed with water. It’s made with no added sugar and less than 5g of fat per serving! Blend the quality protein with fruit or nut butters for extra calories and discover your optimum taste combination. Use after intense training and between meals. Serious Mass has the highest number of calories from Optimum Nutrition’s line of mass gainers. The instantised powder is available in 6 LB and 12 LB tubs. One serving contains two heaped scoops of powder.

Indications

Add two heaping scoops of Serious Mass to a blender filled with 710 ml of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend for an additional 30-45 seconds.


From the manufacturer

What's new with Serious Mass?

Not only does Serious Mass have a fresh new look, but it also has added 3 grams of creatine to support your performance.

The label looks different compared to the previous one I got, is it still the same OPTIMUM NUTRITION product?

As you evolve, so do we. The part of our mission is to help active individuals better understand OPTIMUM NUTRITION products. Now choosing the right product for you is easier with more visible product benefits, features and flavours on each tub.

The tub is not full to the brim when opened, why is that?

This is completely normal and is to do with the way the powder is vacuum packed into the tub. The powder settles over time. This does not impact the weight or number of servings listed on the label.

What is the best way to prepare Serious Mass drink?

To get the optimal consistency and prepare your drink in easy and convenient way, we recommend using a blender.

For optimal use, follow serving instructions on pack.

Are the ingredients tested and safe?

All of the ingredients in our products have been approved and considered safe for consumption by the European Food Safety Authority.

serious mass

Serious Mass

casein

Gold Standard 100% Casein

whey

Gold Standard 100% Whey

pre-workout

Gold Standard Pre-Workout

bcaa

Gold Standard BCAA

When to use
Between meals, after training Before bed After or before training Before training During training
Key benefits
Mass gain Muscle support & repair Muscle support & repair Energy, power & performance Fatigue reduction & immunity
Key features
High calorie powder Slow digesting protein High protein & low sugar Naturally sourced caffeine Electrolytes & BCAAs
Nutritional info
1250 calories / serv. 24g of micellar casein / serv. 24g of protein / serv. 175mg of natural caffeine 5g of BCAAs / serv.
Available sizes
6lb, 12lb 1lb, 2lb, 4lb 1lb, 2lb, 5lb, 10lb 330g 266g

Product information

Technical Details

General Information

Additional Information

Feedback

Would you like to tell us about a lower price?

Product guides and documents

Customer questions & answers

See questions and answers

Customer reviews

4.4 out of 5 stars
4.4 out of 5
59,215 global ratings

Top reviews from United Kingdom

Reviewed in the United Kingdom on 16 February 2019
Flavour Name: VanillaSize Name: 5.45 kg (Pack of 1)Verified Purchase
314 people found this helpful
Report abuse
Reviewed in the United Kingdom on 26 August 2019
Flavour Name: BananaSize Name: 5.45 kg (Pack of 1)Verified Purchase
146 people found this helpful
Report abuse
Reviewed in the United Kingdom on 2 May 2017
Flavour Name: Chocolate Peanut ButterSize Name: 2.73 kg (Pack of 1)Verified Purchase
231 people found this helpful
Report abuse
Reviewed in the United Kingdom on 7 November 2018
Flavour Name: StrawberrySize Name: 2.73 kg (Pack of 1)Verified Purchase
109 people found this helpful
Report abuse
Reviewed in the United Kingdom on 4 October 2018
Flavour Name: ChocolateSize Name: 2.73 kg (Pack of 1)Verified Purchase
112 people found this helpful
Report abuse
Reviewed in the United Kingdom on 25 April 2019
Flavour Name: StrawberrySize Name: 2.73 kg (Pack of 1)Verified Purchase
73 people found this helpful
Report abuse
Reviewed in the United Kingdom on 23 February 2019
Flavour Name: VanillaSize Name: 2.73 kg (Pack of 1)Verified Purchase
Customer image
1.0 out of 5 stars I could not even stomach one vanilla shake
By SB on 23 February 2019
The vanilla flavour tasted absolutely vile, I could not stomach more than a couple of gulps as it made me heave.
Vanilla is usually my go to flavour for shakes but this tastes very strange and nothing like what I am used to, very artificial chemical taste. After a good shake there was froth on the surface that stayed and didn't go away, undisolved product was separating and collecting on the bottom, the colour was aftificial looking yellow, I tried to persevere with the taste but no way I can drink it without heaving.

I can see how they pack in so many calories, the scoop is massive! In my photo the clear scoop comes with this product, the green one is the usual type you get with shakes for comparison.
Maybe I have a bad batch I don't know, Amazon have not got a button to contact seller only send it back so that's what I will have to do.
Images in this review
Customer image
Customer image
62 people found this helpful
Report abuse
TOP 500 REVIEWER
Reviewed in the United Kingdom on 29 September 2018
Flavour Name: StrawberrySize Name: 2.73 kg (Pack of 1)Verified Purchase
64 people found this helpful
Report abuse