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A mound of fine, pale cream-colored powder with a few small clumps sits in a scoop.
⚡High Potassium
💪High Protein
Optimum Nutrition· all products

Gainer Optimum Serious Mass Calories

High-calorie mass gainer, protein and carbohydrate blend

CALORIES · 100 G

380kcal

GI

80high

POTASSIUM · 100 G

350mg

FIBER · 100 G

1.5g

Quick answer

2 slice (large) of Gainer Optimum Serious Mass (334 g) has 1269 calories. That works out to 380 calories per 100 g. It contains 243.8 g of carbs, 50.1 g of protein, 15 g of fat and 5 g of fiber. Its 3.3 µg of B12 covers 139% of the Daily Value. Its glycemic index is 80 (high), so it raises blood sugar quickly.

Gainer Optimum Serious Mass Nutrition Facts

Selected: 2 slice (large) · 334 g

1269

KCAL / 334G

Carbs

243.8g

· 89% DV

Protein

50.1g

· 100% DV

Fat

15g

· 19% DV

Fiber

5g

· 18% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 74% · Protein 15% · Fat 11%

Gainer Optimum Serious Mass nutrition facts table · 2 slice (large) (334 g)

NutrientAmount% DV
Calories1269 kcal
Total fat15 g19%
Saturated fat8.35 g42%
Trans fat0 g
Sodium601 mg26%
Total carbohydrate243.8 g89%
Fiber5 g18%
Protein50.1 g100%

Calories: Calories measure energy. Average daily need is 2,000 kcal. Excess calories are stored as fat, too few cause weight loss.

Carbs: Your body's primary energy source. The brain runs exclusively on carbs. Daily need: 275g.

Protein: Essential for muscle repair and cell growth. Daily need: 50g. Keeps you full and boosts metabolism.

Fat: Needed for hormone production and vitamin absorption. Daily need: 78g. Limit saturated fats, choose unsaturated.

Fiber: Critical for digestive health and satiety. Daily need: 28g. Stabilizes blood sugar, lowers cholesterol.

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How Many Calories in 1 Slice of Gainer Optimum Serious Mass?

ServingAmountCalories
1 slice (medium)167 g635 kcal
1 tablespoon (medium)10 g38 kcal
1 slice (small)84 g319 kcal
100 g100 g380 kcal
1 cup (medium)100 g380 kcal
2 slice (large)334 g1269 kcal
1 serving (large)334 g1269 kcal
1 pack (jumbo)1250 g4750 kcal

Calculated from 380 calories per 100 g.

Frequently Asked Questions About Gainer Optimum Serious Mass

What is Optimum Serious Mass used for?

Optimum Serious Mass is a powdered mass gainer intended to add energy and protein to your diet when you are trying to gain weight. Use it alongside regular meals rather than treating it as a replacement for a balanced diet.

Does Optimum Serious Mass help you gain weight?

Yes, Optimum Serious Mass can support weight gain by adding substantial energy to your usual intake. It is more likely to help when added to meals rather than used in place of them, but it cannot guarantee a particular result.

How do you make Optimum Serious Mass?

Mix Optimum Serious Mass with the liquid and amount directed on the package, using a shaker or blender until smooth. The full serving can be bulky, so you can divide it into smaller drinks if that is easier to tolerate.

Should you mix Optimum Serious Mass with milk or water?

You can mix Optimum Serious Mass with either milk or water. Milk makes the shake creamier, while water gives it a lighter texture; choose water if dairy does not agree with you or you prefer a less rich drink.

How many scoops of Optimum Serious Mass should you take?

Follow the serving directions on your Optimum Serious Mass package because scoop sizes and directions can vary by product version. If the listed serving feels too large, start with less and assess how well you tolerate it instead of forcing it down.

When should you take Optimum Serious Mass, before or after a workout?

There is no required workout timing for Optimum Serious Mass; you can take it before or after training, or at another convenient time. Avoid taking a large shake just before exercise if it makes you feel uncomfortably full.

Can you take Optimum Serious Mass without working out?

Yes, you can take Optimum Serious Mass without working out, but the extra energy may still contribute to weight gain. Strength training can help direct weight gain toward muscle, while the shake itself does not build muscle without training.

What are the side effects of Optimum Serious Mass?

Optimum Serious Mass can cause bloating, gas, or other digestive discomfort, especially if you drink a large serving quickly. Try a smaller amount first; mixing it with milk may also cause problems if dairy does not suit you.

Can people with diabetes use Optimum Serious Mass?

People with diabetes should ask their healthcare professional before using Optimum Serious Mass. Its high carbohydrate content can affect blood glucose, so whether it fits depends on your individual treatment and blood sugar management.

Gainer Optimum Serious Mass Vitamins & Minerals

Vitamins

B12

3.34µg · 139% DV

B2

1.67mg · 128% DV

B1

1.34mg · 112% DV

B3

16.7mg · 104% DV

Minerals

Copper

0.67mg · 74% DV

Phosphorus

501mg · 72% DV

Calcium

668mg · 67% DV

Zinc

6.68mg · 61% DV

Potassium ⭐

1169mg · 34% DV

Sodium

601mg · 26% DV

Gainer Optimum Serious Mass Glycemic Index

GLYCEMIC INDEX

80
High
0 Low5570100

GLYCEMIC LOAD

193.7
High

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Gainer Optimum Serious Mass

To burn the 1269 calories in 2 slice (large) (334 g):

🚶

314min

Walking (5 km/h)

🏃

129min

Running (8 km/h)

🚴

173min

Cycling

🏊

148min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

What is Gainer Optimum Serious Mass?

Gainer Optimum Serious Mass is a powdered sports supplement from Optimum Nutrition, designed to be mixed with water or milk. It combines protein and carbohydrates and is generally used around workouts or between meals rather than as a conventional meal.

The prepared drink is typically sweet, with a thicker texture when made with milk; blend or shake it until smooth and serve cold. It is energy-dense and carbohydrate-led, with 73 g of carbohydrates per 100 g. For a lighter drink, mix it with water or use a smaller portion, and adjust the amount to fit alongside your usual meals.

How Nutritious Is Gainer Optimum Serious Mass?

Nutrient density

Medium

35/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Low

32/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Is Gainer Optimum Serious Mass Processed?

NOVA 4

Ultra-Processed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Gainer Optimum Serious Mass Contain Allergens?

Contains these allergens:

Gluten free
Dairy yes
Eggs free
Peanuts free
Tree nuts free
Fish free
Soy yes
Sesame free

Which Diets Is Gainer Optimum Serious Mass Good For?

Vegan

— Not suitable

Vegetarian

✓ Suitable

Gluten-Free

— Not suitable

Dairy-Free

— Not suitable

Mediterranean

— Not suitable

Paleo

— Not suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

— Not suitable

Low FODMAP

— Not suitable

Gainer Optimum Serious Mass Fat Profile

SATURATED

8.35g

MONOUNSATURATED

4.01g

POLYUNSATURATED

2.34g

⚖️

Omega 6:3 ratio 5.9:1

Above the ideal 4:1 (5.9:1).

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Nutrition data compiled from USDA FoodData Central and scientific sources.