Optimum Nutrition - Serious Mass - 5.45kg

€73.99 €49.99

Quick description:

Optimum Nutrition Serious Mass provides 1250 calories derived mainly from protein sparing complex carbohydrates and a high quality protein blend consisting of Whey Protein Concentrate, Calcium Caseinate, and Egg albumen. Creatine Monohydrate, Glutamine, C

Optimum Nutrition Serious Mass

Optimum Nutrition Serious Mass provides you with the most effective weight gaining formula available today. For many with aspirations of adding size and mass there are a number of barriers in the way; an over fast metabolism, a smaller appetite, a hectic lifestyle; all can make keeping on top of the body’s caloric needs seem nigh on impossible. In Serious Mass, however, Optimum Nutrition have provided the answer to the problems of every hard gainer, or even those who just want to add some more size quickly and easily, in one delicious, calorie dense weight gainer.

Why Serious Mass

In a nutshell to gain weight we need to consume more calories in a day than we burn off.  We can do this by eating energy dense (higher caloric content) foods such as legumes, oats, nuts and bananas. Of course, for whatever reason, it is often easier said than done to consume the calories needed through diet alone in order to gain the weight you desire. This is where Serious Mass comes in -


  • With over 1250 calories per serving (an average adult male requires around 2500 calories a day for regular maintenance and even more when highly active) going up to around 1600 when mixed with semi skimmed milk, Serious Mass provides a massive boost to your daily caloric intake.
  • Each Serious Mass shake is made up of 250g of premium quality carbs and 50g of a slow, medium and fast releasing protein blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumin, Sweet Dairy Whey).
  • As well as this Optimum Nutrition have added 25 key vitamins & minerals plus a dash of Glutamine and Creatine for good measure!

How to use Optimum Nutrition Serious Mass

It should be remembered that ON Serious Mass in not intended as a complete meal replacement, but should rather be taken to supplement a healthy, balanced diet. On option that many may go for is to eat normally during the day before fixing up a weight gaining shake to have just before bedtime; it’s when your body is at rest that it does its growing, not during workouts. Serious Mass can also be seen to be ideal for post workout convenience and recovery, a shake quickly provides your body with the carbs and protein it needs while also satisfying your appetite and giving you more time and leeway to prepare your post workout meal.

Amount Per Serving

Per 334g (2 scoops):
Calories: 1250
Calories from Fat: 40
Total Fat: 4.5g
Saturated Fat: 3g
Cholesterol: 75mg
Total Carbohydrate: 252g
Sugars: 40g
Protein: 50g
Vitamin C: 60mg
Vitamin D: 200 I.U.
Vitamin E: 30 I.U
Thiamin: 5mg
Riboflavin: 5mg
Niacin: 50mg
Vitamin B6: 5mg
Folic Acid: 400mcg
Vitamin B12: 20mcg
Biotin: 300mcg
Pantothenic Acid:100mg
Calcium: 730mg
Iron: 6mg
Phosphorus: 350mg
Iodine: 75mcg
Magnesium: 186mg
Zinc: 30mg
Selenium: 200mcg
Copper: 1mg
Manganese: 10mg
Chromium: 600mcg
Molybdenum: 150mcg
Sodium: 600mg
Potassium: 1230mg
Choline: 250mg
Inositol: 250mg
PABA: 5mg
Creatine Monohydrate: 1g
L-Glutamine: 500mg


Add two heaping scoops of ON Serious Mass to a blend with 650-750ml of cold water or milk. New users may find it beneficial to begin with one half serving daily for the first week, gradually increasing to one or more full servings several times a day.