Is Mutant Mass Good for Bulking? Mutant Mass vs Extreme 2500 Explained
Today, in the start of a new series of product spotlight articles we are going to take a look at perhaps our most popular mass gainer - Mutant Mass. If you are trying to put on serious size, Mutant Mass is one of the first gainers that comes up. It is a very high calorie shake designed to help you hit a calorie surplus more easily, which is exactly what you need for bulking. For most lifters who struggle to eat enough food, Mutant Mass is a strong option for supporting weight and muscle gain as long as it is used alongside a sensible training plan and diet.
Mutant also make an even higher calorie follow up called Mutant Mass Extreme 2500, which is aimed at extreme hardgainers. In this guide we look at whether Mutant Mass is good for bulking, how it compares to Mutant Mass Extreme 2500 and how to decide which one suits your goals best.
What is Mutant Mass?
Mutant Mass is a high calorie muscle mass gainer designed for lifters who struggle to eat enough calories from food alone. A full serving provides around 1,100 calories, 56g of protein, 192g of carbohydrates and 12g of fat when mixed as directed. It uses whole food style carbohydrate sources such as barley, sweet potato and oats alongside added healthy fats from oils like avocado and flaxseed to deliver a dense calorie hit without needing another full meal.
This combination of carbs, protein and fats makes it a useful option during bulking phases when appetite is low but training volume and calorie needs are high.
Who is Mutant Mass for?
Mutant Mass is mainly aimed at:
- Lifters with a naturally fast metabolism who struggle to gain weight
- People who want to add a high calorie shake between meals rather than force down more food
- Those starting a bulk who need an easy way to reach 3,000-4,000 plus calories per day
- Athletes in heavy training blocks who need extra carbs and protein around sessions
It is not designed for cutting diets, low calorie phases or people who already put on weight very easily. In those situations a standard whey protein with lower calories is usually more appropriate.
How many calories are in Mutant Mass?
A typical full serving of Mutant Mass comes in at roughly 1,100 calories with 56 g protein, 192 g carbohydrates and around 12 g fat when mixed with water as directed. Exact numbers can vary slightly by batch and flavour, but it is consistently at the higher end of the gainer scale for calories and carbs.
Because the calorie load is so high, many people start with half a serving and build up over time once they know how their digestion responds.
How and when to take Mutant Mass
Most people use Mutant Mass once per day, either:
- After training as a post workout gainer shake
- Between meals as a high calorie snack
- Occasionally in the evening if they have fallen short on daily calories
If you are new to mass gainers, start with half the suggested serving size, take your time drinking it and see how you tolerate it. Once that feels fine, you can move to a full serving as needed.
What is Mutant Mass Extreme 2500?
Mutant Mass Extreme 2500 is the more aggressive, higher calorie option in the Mutant gainer range. It is built for extreme hard gainers with very fast metabolisms who find it difficult to gain weight even when eating large amounts of food.
When mixed as directed with two cups of 1 percent milk, one serving of Mutant Mass Extreme 2500 provides around 1,270 calories with 46g protein, 255g carbohydrates and 7.5g fat. Two such shakes per day can deliver up to 2,540 calories and 92g protein on top of normal meals, which is why it is positioned as an option for more extreme mass gain phases.
Mutant Mass vs Mutant Mass Extreme – key differences
1. Total calories per serving
Mutant Mass already sits at roughly 1,100 calories per full serving, which is more than enough for most people who are bulking. Mutant Mass Extreme 2500 is designed to take that even further. When mixed with milk as directed, a single Extreme shake is around 1,270 calories, and two shakes per day can reach roughly 2,540 calories in total.
In simple terms, Mutant Mass is a high calorie gainer. Mutant Mass Extreme 2500 is a very high calorie gainer aimed at people who need every extra calorie they can get.
2. Carbohydrate load
Both products use a blend of carbohydrates, but Mutant Mass Extreme 2500 delivers a higher total carb hit per serving, especially when used twice daily. This is ideal for lifters with very high training volume or those who struggle to keep glycogen topped up through food.
Mutant Mass still provides plenty of carbs for most bulking diets, and many users will not need to go beyond that unless they are burning through calories at an unusually fast rate.
3. Protein content
Mutant Mass provides around 56 g protein per full serving. Mutant Mass Extreme 2500 provides around 46 g protein per serving when mixed with milk, but because the recommendation is to use two servings per day for maximum results, the daily total can reach around 92 g protein from the gainer alone.
In both cases the protein comes from whey sources in a blend designed to support muscle repair and growth when combined with resistance training.
4. Who each gainer is best suited to
Mutant Mass is usually best if:
- You are starting a bulk and want a high calorie shake but not something extreme
- You have a reasonably fast metabolism but can gain weight when you push calories up
- You prefer a single daily gainer shake alongside normal meals
- You want something easier on digestion than very large servings of food
Mutant Mass Extreme 2500 is usually best if:
- You have tried eating more food and using standard gainers but still struggle to gain weight
- You train hard several times per week and burn through a lot of calories
- You want to add a very large calorie surplus on top of your regular diet
- You are in a short, focused phase where rapid weight gain is the priority
If you are unsure where to start, Mutant Mass is normally the safer first choice. You can always move up to Mutant Mass Extreme later if your progress stalls and you know you can handle the higher calorie intake.
Which one is better for bulking?
There is no single answer, because "better" depends on your metabolism, training and appetite.
For most people, Mutant Mass offers more than enough calories and carbs to support steady weight gain when used consistently alongside a calorie surplus from food. It is often easier to fit into a routine and can be used across longer bulking phases.
Mutant Mass Extreme 2500 comes into its own for genuine hard gainers who have already pushed food and standard gainers quite far and still find the scales barely moving. In that scenario the extra calories can make a noticeable difference, especially over shorter, more aggressive bulking blocks.
FAQ – Mutant Mass and Mutant Mass Extreme
Will Mutant Mass make me gain fat?
Any calorie surplus can lead to some fat gain. Mutant Mass is designed to support muscle growth during bulking phases, but your overall diet and training will determine how much of the weight gained is lean tissue versus fat. Aim for a moderate surplus rather than pushing calories to the absolute limit if you want slower, leaner progress.
Is Mutant Mass good for bulking?
Yes. Mutant Mass is good for bulking when you use it to help create a sensible calorie surplus alongside a structured resistance training plan. It is particularly useful if you struggle to hit higher calorie targets from food alone, or if appetite drops off later in the day.
Can beginners use Mutant Mass?
Yes. Beginners who struggle to hit their calorie targets through food often find a gainer shake helpful. It is usually best to start with a smaller serving and focus on building good training habits at the same time.
Can I take Mutant Mass or Mutant Mass Extreme on rest days?
Many people still use their gainer on rest days to keep their weekly average calorie intake high. If you are gaining weight faster than you would like, you can reduce the serving size or frequency on days you do not train.
Can I use a gainer instead of meals?
Mutant Mass and Mutant Mass Extreme are supplements, not meal replacements. They work best alongside regular meals. Think of them as an extra calorie tool rather than a substitute for normal food.
Which one should I choose if I am very skinny?
If you are naturally very slim and have already tried increasing food intake but still find it difficult to gain weight, Mutant Mass Extreme 2500 can be a strong option thanks to its much higher daily calorie potential. If you are just starting out and are not yet consistently hitting higher calorie targets from food, Mutant Mass is often a more manageable starting point.
Where to buy Mutant Mass and Mutant Mass Extreme in the UK
You can buy both gainers with fast UK delivery from The Supplement Store Mutant collection. If you are still unsure which option is right for you, starting with Mutant Mass and tracking your weight, strength and appetite over a few weeks is usually the simplest way to see whether you need to move up to Mutant Mass Extreme 2500.
