Skip to content

Free shipping on orders above €60

15% off your first order when you sign up to our newsletter

Shop
- Offers
- All Products
- Protein
  
  Protein Powders
  NEW! Whey + Collagen
  Clear Protein
  Protein Bars
  Protein Shakes
  100% Isolate Protein
  100% Casein Protein
  View All
- Creatine
  
  Micronised Creatine Powder
  Platinum Creatine Plus
  View All
- Energy
  
  NEW! Electrolytes
  Anytime Energy
  Pre-Workout
  Energy Drinks
  View All
- Weight Gainers
- Platinum Range
  
  Platinum Creatine
  Platinum Pre-Workout
  Platinum Pump Pre-Workout
  Platinum Hydrowhey
  View All
- Collagen
- Elite
- Vitamins
- Vegan & Plant Based
- Shakers
  
  Shop all
- Bundles
Goals
Advice
Protein Calculator
Partnerships
- McLaren
- Our Athletes

Optimum Nutrition

Country
Search
Login
Cart
0 items

Protein Calculator

Country

Account

Offers
All Products
Weight Gainers
Collagen
Elite
Vitamins
Vegan & Plant Based
Bundles

Lean Physique
Build Muscle
Weight Management
Active Lifestyle
High Performance
Endurance

Recipes
Blogs
Ask Coach Optimum
Expert Advice
New to Supplements
Optimum Insiders

McLaren
Our Athletes

Protein Powders
NEW! Whey + Collagen
Clear Protein
Protein Bars
Protein Shakes
100% Isolate Protein
100% Casein Protein
View All

Micronised Creatine Powder
Platinum Creatine Plus
View All

NEW! Electrolytes
Anytime Energy
Pre-Workout
Energy Drinks
View All

Platinum Creatine
Platinum Pre-Workout
Platinum Pump Pre-Workout
Platinum Hydrowhey
View All

Shop all

0

Your cart is empty

Continue shopping

Home
Weight Gainers

Filters

Sort by

Featured

Most relevant

Best selling

Alphabetically, A-Z

Alphabetically, Z-A

Price, low to high

Price, high to low

Date, old to new

Date, new to old

In stock only

Price

€ to €

Flavour

Banana (1)

Chocolate (1)

Chocolate Mint (1)

Chocolate Peanut Butter (1)

Cookies & Cream (1)

Strawberry (1)

Vanilla (1)

Size

1.0 - 3.0 kg (1)

3.0 - 6.0 kg (1)

Product Type

Powder (1)

Filters

In stock only

Price

€ to €

Flavour

Banana (1)

Chocolate (1)

Chocolate Mint (1)

Chocolate Peanut Butter (1)

Cookies & Cream (1)

Strawberry (1)

Vanilla (1)

Size

1.0 - 3.0 kg (1)

3.0 - 6.0 kg (1)

Product Type

Powder (1)

Weight Gainers

2 products

Optimum Nutrition Serious Mass, 2.73 kg container, chocolate flavor, supports muscle building and weight gain

Serious Mass Weight Gainer Protein Powder

Sale priceFrom €30,00

Serious Mass Gainer & Creatine Pack

Sale price€112,00

Join the Optimum Nutrition community

Be part of over 100K of fitness enthusiasts and unlock:

15% discount on your first order
Exclusive member discounts & first access to new products
Expert tips to maximise your performance

E-mail

CUSTOMER SERVICE

Customer Service
Delivery Information
Payment Options
Ordering
Return Policy
FAQ
Contact

ABOUT OPTIMUM NUTRTITION

Authentic Products
Our Quality
About Us
Privacy Policy
Competition T&Cs
Modern Slavery Act Transparency Statement
Sustainability Commitment
Careers
B2B Sign-up form
B2B Login
Cookies
Your Privacy Choices

EXPLORE

Advice
Athletes
Recipes
Health & Performance course
Recycle

Instagram
YouTube

NEED HELP?

Submit Query

Country

Language