Serious Mass Gainer by Optimum Nutrition 5.44kg (12lbs)

$170.45

Serious Mass by Optimum Nutrition is an ultra high-calorie mass gainer delivering over 1250 calories, 50g of protein, and 250g of carbohydrates per serve.

Designed for hard gainers, it helps support muscle growth, recovery, and consistent calorie intake for those looking to gain size.

Description

When your goal is to gain serious size, standard shakes often aren’t enough. Serious Mass by Optimum Nutrition is a high-calorie mass gainer designed for those who struggle to eat enough and need a reliable way to increase daily calorie intake.

Each serve delivers over 1250 calories, 50g of protein, and 250g of carbohydrates, making it one of the most calorie-dense options available. Built around a multi-source protein blend including whey, casein, egg albumen, and hydrolysed whey, it provides both fast and sustained amino acid delivery to support muscle growth and recovery.

What sets Serious Mass apart is its maximum calorie delivery approach. With a carbohydrate-heavy formula and added creatine, glutamine, and a full vitamin and mineral profile, it’s designed to support training performance, recovery, and overall daily nutrition.

Designed for hard gainers, athletes, or anyone in a bulking phase, it’s an easy way to add significant calories without needing to constantly eat. With a smooth, milkshake-style texture, it makes hitting your calorie goals more achievable and consistent.

Benefits

💪 Supports muscle growth, recovery, and size
⚡ Delivers 1250 calories for serious calorie support
🔥 High carbohydrate formula to support energy and training performance
🧬 Multi-source protein blend with naturally occurring BCAAs and EAAs
🏋️‍♀️ Supports recovery after heavy training sessions
🥄 Smooth, milkshake-style texture for easy calorie intake

Who it's for

✔ People who struggle to gain weight or eat enough calories
✔ Hard gainers needing high-calorie support
✔ Individuals looking to build size and strength
✔ Gym-goers in a bulking or mass phase
✔ Anyone wanting a convenient way to increase calorie intake

Directions for use

Mix two (2) scoops with approximately 600ml of water or your preferred liquid. Shake or stir until smooth. Adjust liquid to taste.

Can also be added to foods such as oats, smoothies, or yoghurt.

Consume after training or anytime throughout the day to support your daily protein and calorie intake.

Nutrition & ingredients

Serious Mass Gainer by Optimum Nutrition Chocolate Flavour Nutrition Information

Ingredients: Maltodextrin, Protein Blend (Whey Protein Concentrate (Milk), Calcium Caseinate (Milk), Egg Albumen, Whey Protein Isolate, Hydrolysed Whey Protein), Cocoa (Processed with Alkali), Natural and Artificial Flavours, Vitamin and Mineral Blend (Vitamin C, Vitamin E, Niacinamide, Zinc, Calcium, Iron, Vitamin A, Pantothenic Acid, Vitamin B6, Vitamin B2, Thiamine, Folic Acid, Biotin, Vitamin D, Vitamin B12), Creatine Monohydrate, Glutamine, Choline Bitartrate, Inositol, Medium Chain Triglycerides, Emulsifiers (Soy Lecithin), Thickener (Cellulose Gum), Sweeteners (Acesulphame Potassium, Sucralose).

Formulated Supplementary Sports Food

Not suitable for children under 15 years of age or while pregnant. This food is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and appropriate physical training or exercise program. If any health symptoms exist, please seek medical or dietetic supervision to ensure this product is suitable for you.

Store in a cool, dry place away from direct sunlight.