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.

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.

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💥 Bulk up smarter, not harder with Serious Mass!

PERFORMANCE BOOST - 3 grams of creatine monohydrate to elevate your high-intensity workouts.
CALORIE POWERHOUSE - Fuel your gains with 1262+ calories per serving—because average just won’t cut it.
MUSCLE GROWTH MAXIMIZER - 50 grams of premium protein to sculpt and support serious muscle development.
VITAMIN MINERAL COMPLEX - 25 essential vitamins and minerals to keep your body optimized and recovery sharp.
FLAVOR VARIETY CONVENIENCE - Six crave-worthy flavors, easy mix with water or plant milk—your post-workout ritual just got tastier.

Optimum Nutrition Serious Mass is a high-calorie mass gainer protein powder delivering over 1262 calories, 50g protein, and 3g creatine per serving. Enriched with 25 essential vitamins and minerals and low in fat, it supports muscle growth, recovery, and performance. Available in six delicious flavors, it’s designed for athletes and fitness enthusiasts aiming for serious size and strength gains.

€ 243.21

Duties & taxes incl.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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Allergen Information	Contains: Eggs, Gluten, Lactose, Milk, Peanuts may contain, Soy may contain, Wheat
Weight	5.44 kg
Units	5450.0 gram(s)
Storage Instructions	In a cool, dry place
Serving Recommendation	334 Grams
Manufacturer contact	4 Waterside, Dublin 24, Ireland
Country of origin	gb
Brand	Optimum Nutrition
Format	Powder
Age Range Description	Adult
Country of origin	United Kingdom
Serving Size	100 g, 334 g
Energy (kJ)	1571.00 kJ
Energy (kcal)	375.47 kcal
Fat	2.1000 g
Carbohydrate	74.0000 g
Protein	15.0000 g
Salt	0.3500 g

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 16 Servings, 5.45 kg

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