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On Serious Mass 12 LBS
Size: 12 LBS (approx. 5.44 kg)
Form: Powder
Primary Macronutrients: Carbohydrates, Protein, Fats
Key Active Ingredients: Blended Protein, Carbohydrate blend, Creatine, Glutamine, Multivitamin & Mineral Complex
Serving Size: 2 Scoops (mixed with liquid)
Optimal Usage: Between meals, Post-workout, Before bed
Calories: 1,250
Protein: 50 Grams
Carbohydrates: Over 250 Grams
Fat: Less than 5 Grams
Added Nutrients: 25 Vitamins & Minerals, Creatine, Glutamine
Brand: Optimum Nutrition
Product Type: High Calorie Weight Gainer
Form: Powder
Size: 12 LBS (approx. 5.44 kg)
Serving Size: 2 Scoops (mixed with liquid)
Calories per Serving: 1,250
Protein per Serving: 50g
Carbohydrates per Serving: Over 250g
Fat per Serving: Less than 5g
Key Active Ingredients: Blended Protein, Carbohydrate Blend, Creatine, Glutamine, Multivitamin & Mineral Complex
Added Nutrients: 25 Vitamins & Minerals, Creatine, Glutamine
Optimal Usage: Between meals, Post-workout, Before bed
Flavor Options: Chocolate, Strawberry, Vanilla, Cookies & Cream, Chocolate Peanut Butter, Smooth Banana
Special Note: Packaging may vary; product sensitive to heat/sunlight – be available at delivery
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Smart shopping
Pick the size, flavour and quantity, then add to cart or order now
| Image | Size and flavour | Price | Quantity and order | ||
|---|---|---|---|---|---|
| Chocolate 12 LBS Chocolate |
45.045 OMR
|
In stock | 023800 | ||
| Strawberry 12 LBS Strawberry |
45.045 OMR
|
In stock | 023817 | ||
| Vanilla 12 LBS Vanilla |
45.045 OMR
|
In stock | 023824 | ||
| Chocolate Peanut Butter 12 LBS Chocolate Peanut Butter |
45.045 OMR
|
In stock | 052572 | ||
| Cookies & Cream 12 LBS Cookies & Cream |
45.045 OMR
|
Out of stock | 055641 | ||
| Smooth Banana 12 LBS Smooth Banana |
45.045 OMR
|
Out of stock | 28874 |
Looking for a flavour, a size or a brand we do not carry?
Tell us what you need and our sourcing team will study it with our authorised suppliers and reply within two working days.
Nutrition Facts
| Serving Size | 340 g (about 2 heaping scoops) |
|---|---|
| Servings Per Container | 16 |
| Calories | 1260 kcal |
| Protein | 50 g |
| Carbohydrates | 253 g |
| of which Sugars | 30 g |
| Fat | 5 g |
| of which Saturates | 3 g |
| Sodium / Salt | 680 mg |
| Supplement Facts | 340 g | % DV |
|---|---|---|
| Servings per container | 16 | |
| Calories | 1260 | |
| Total Fat | 5 g | 6%* |
| Saturated Fat | 3 g | 15%* |
| Cholesterol | 200 mg | 67% |
| Total Carbohydrate | 253 g | 92%* |
| Total Sugars | 30 g | ** |
| Includes 8g Added Sugars | 16%* | |
| Protein | 50 g | 100%* |
| Vitamin A (as vitamin A acetate) | 340 mcg | 38% |
| Vitamin C (as sodium ascorbate) | 30 mg | 33% |
| Vitamin E (as dl-alpha tocopheryl acetate) | 4 mg | 27% |
| Thiamin (as thiamin hydrochloride) | 0.4 mg | 33% |
| Riboflavin | 0.9 mg | 69% |
| Niacin (as niacinamide) | 4 mg | 25% |
| Vitamin B6 (as pyridoxine hydrochloride) | 0.4 mg | 24% |
| Folate (as folic acid) | 170 mcg DFE (100 mcg folic acid) | 43% |
| Vitamin B12 (as cyanocobalamin) | 1.6 mcg | 67% |
| Biotin (as d-biotin) | 60 mcg | 200% |
| Pantothenic Acid (as d-calcium pantothenate) | 3 mg | 60% |
| Calcium (as calcium carbonate, calcium phosphate) | 700 mg | 54% |
| Iron (as ferrous fumarate) | 5.8 mg | 32% |
| Iodine (as potassium iodide) | 23 mcg | 15% |
| Magnesium (as magnesium phosphate) | 140 mg | 33% |
| Zinc (as zinc oxide) | 3 mg | 27% |
| Copper (as copper gluconate) | 0.4 mg | 44% |
| Manganese (as manganese sulfate) | 0.4 mg | 17% |
| Sodium | 680 mg | 30% |
| Potassium | 940 mg | 20% |
| Creatine Monohydrate | 5 g | ** |
*Percent Daily Values are based on a 2,000 calorie diet. **Daily Value not established.
Nutrition values differ slightly between flavours. The panels above are the official labels for the flavours shown — always refer to the label on your container.
Allergens
Contains: Milk and Soy.
Warnings
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
How to Use
Mix 340g (about two heaping scoops) with cold water, milk, or other beverage in blender for 30-45 seconds until dissolved. New users may find it beneficial to begin with half of a serving for the first week and then gradually increase to 1 serving. Suggested Use: For best results, consume 2-scoop serving regularly over time in combination with regular resistance exercise.
Olympia Sports Oman brings you the On Serious Mass 12 LBS by On, part of our Mass Gainers range, with a practical design and selected materials for training and everyday use across the Sultanate.
Key features
- Palatable taste that makes it easier to stay consistent
- Genuine product supplied through approved channels
- Practical packaging that helps protect product quality
- Suitable for beginners and experienced athletes alike
Best for
Muscle-building programmes, post-workout recovery and daily activity support. Consult a qualified professional before use.
Product information
- Brand: On
- Category: Mass Gainers
- Availability: Available online and at our stores across the Sultanate of Oman
For more details or help choosing the right size, contact our customer service team.
Need help before you order?
Message us on WhatsApp and our specialists will guide you to the best choice for your training goal.
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Everything you need to know
Frequently asked questions
Are the products genuine?
Yes. All supplements at Olympia are 100% genuine, imported through authorised distributors, and delivered sealed with a clear expiry date.
How long does delivery take?
We deliver free of charge across Oman and prepare your order as soon as it is confirmed. Message us on WhatsApp for the expected time in your area.
Can I pay on delivery?
Yes, cash on delivery is available, and you can also pay online through a secure encrypted payment gateway.
How do I choose the right dose or flavour?
Contact us on WhatsApp or by phone and our specialists will guide you based on your goal, weight and training level.
Can I exchange or return an item?
For an exchange or a return, contact our customer service on WhatsApp or by phone and we will assist you according to the store policy.
Delivery
- Free delivery on orders of OMR 10 and above
- 2-3 business days across all of Oman
- Cash on delivery, or free collection in store
Returns & refunds
- 30 days to return an unopened product
- Returns are free inside Oman
- Replacement or full refund if damaged or wrong
Payment & security
- Cards and wallets via Thawani and Paymob
- Cash on delivery inside Oman
- Encrypted checkout, we never store your card
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