Serious Mass

Optimum Nutrition Serious Mass is one of the most popular weight gainers worldwide. Like all Optimum Nutrition products, it offers high quality at a good price. In addition to protein, the powder naturally contains plenty of carbohydrates as well as several supplements that benefit the body not only after a tough workout but also during muscle-building or mass phases in general. It is particularly noteworthy that Optimum Nutrition does not add refined sugar — all sugars and carbohydrates in this weight gainer are from natural sources.
 

Product highlights of the gainer at a glance

• 1,250 kcal per serving
• 50 g protein (whey protein, casein, egg protein, whey) per serving
• 250 g carbohydrates per serving
• No added sugar
• With creatine & glutamine
• 25 vitamins & minerals

Who is Serious Mass suitable for?

Serious Mass is the ultimate weight gain formula. For anyone who finds it difficult to gain mass — so-called hardgainers — Serious Mass can help build the body they’ve always wanted when combined with intense strength training. Athletes with very high calorie and nutrient requirements due to heavy training can also meet their daily intake with this weight gainer without having to overeat.


To reach the calories of one shake without supplements, you would otherwise need to consume one or two additional large meals. This makes the weight gainer a convenient and tasty calorie source packed with protein, carbohydrates, and vitamins. Anyone in a bulking phase or aiming to increase strength can quickly and easily consume protein and carbohydrates this way. The weight gainer is also ideal as a replacement for the combination of whey protein and an energy-rich bar, both of which are commonly consumed after training.

Optimum Nutrition Serious Mass is available in classic flavors like chocolate and vanilla, as well as chocolate peanut butter, cookies and cream, and banana — offering something for every taste.

Ingredients of Serious Mass

In addition to protein and carbohydrates, the Optimum Nutrition weight gainer also provides: Creatine monohydrate, which supports the body during intense training when taken daily. It not only enhances performance but also indirectly supports muscle growth by providing more energy and shortening recovery times. The 500 mg of the amino acid glutamine supports a balanced acid-base metabolism and helps, among other things, in the breakdown of ammonia in the liver and kidneys.
In addition, the weight gainer contains valuable minerals and trace elements that contribute to healthy metabolism — such as 15 mg zinc, 140 mg magnesium, 630 mg calcium, and 120 mcg chromium. It also contains choline and inositol, which contribute to normal fat metabolism. Serious Mass also provides a balanced vitamin profile with vitamins A, D, E, and C, as well as important B vitamins — including 0.6 mg vitamin B1, 6.7 mg niacin, and 0.7 mg vitamin B6. This ensures comprehensive nutrient support and helps prevent general fatigue.
 

How to take the weight gainer

Mixed with water or low-fat milk, the powder becomes a delicious shake delivering 1,250 calories per serving. It contains 50 g of various proteins for muscle growth and 250 g of carbohydrates to replenish glycogen stores.

Based on experience, when using more than 300 g of powder, more liquid than the recommended 700 ml of water or milk should be used, as the mixture may otherwise become too thick to drink. Using a blender is also recommended, as despite good solubility, the large quantity can form lumps in a shaker — if the shaker is even large enough.
Many athletes prefer to mix half a serving in the morning after waking up and another half after their workout. The shake tastes especially creamy when mixed with milk, but it also tastes great with water.


In short, Optimum Nutrition Serious Mass is the ideal weight gainer not only to support fitness and nutrition during a bulking phase but also for its strong price-performance ratio and high quality. Provide your body with premium whey protein and fast carbohydrates in one convenient powder — the taste will convince you.

Recommended use: Mix 1 scoop of powder with 400 ml of milk. Depending on your needs, consume 1–3 shakes per day before and/or after training or as a snack between meals.