Mutant Mass The Ultimate Mass Gainer

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Mutant Mass is one of the most complete and effective weight gainer formula in the world.  When it comes to packing on quality mass, bodybuilders and athletes all over the world rely on it.  After years of relentless research and development, Mutant Mass has been specifically formulated with one goal in mind, to help you quickly pack on mutant size.

Mutant Mass features:

  • High protein weight gainer to help build and repair muscles
  • Delivers 52,000mg of amino acids per serve
  • 1050 of clean calories per serve
  • Mixes easy and tastes great 

What's in Mutant Mass?

  • 56 grams of protein per serve
  • 1100 clean calories per serve
  • Iso-Stack10 - high quality blend of amino acids
  • Includes 36g of naturally occuring BCAAs, EAAs and Glutamines
  • Now including oats, sweet potato and avocado

The unique protein matrix supplies the body with 10 complete protein sources, which provides an immediate and long-lasting increase in protein synthesis. When you combine the powerful protein matrix with the other key nutrients found in this shake, you have the ultimate formula for rapid gains in rock-hard mass.

Available Sizes:
Container Size: 2.27KG (5lb)
Serving Size: 4 scoops (280g)
Servings Per Container: 8

Container Size: 6.8KG (15lb)
Serving Size: 4 scoops (280g)
Servings Per Container: 26

Recommended Use:
Can be taken first thing in the morning, a second immediately after training.

Shake or mix 4 scoops  with 480-960 ml (16-32 fl oz) of water or milk.



All orders are Free Shipping Nationwide:

CourierPost Express – Tracking information will be emailed to you once your order has been collected from our warehouse.  

Collection 4 times a day, final pick each day at 3.45pm Monday to Friday. We will process and pack your parcel within minutes of receiving your order.

Estimated Delivery Times:

Auckland – Overnight (However many Auckland orders will be delivered the same day depending on what time the order is placed)

North Island - Overnight

South Island – Overnight (for larger parcels allow 2 business days)
*Express South Island overnight delivery service available during check out.  These orders are transported by air rather than Courier Post trucks.

Rural - +1 business day from the above times

CourierPost does not operate on weekends or public holidays. 

Click and Collect:

Collection from Sprint Fit store
    Unit 2, 74 France St South 
    Eden Terrace

Please use the Sprint Fit allocated parking out front.

For Click and Collect please select ‘Pick Up’ during check out, orders ready for collection within 30 minutes of placing them.  Monday – Friday 9am-4pm.

Click here to view the full Shipping Details and Returns Policy.

Mutant Mass Reviews

4.25/5 based on 33 customer reviews

Overall Rating

8.5 /10

33 Ratings

Average Flavour Rating

9.8 /10

4 Flavours

Top Rated Flavour

10 /10

Triple Chocolate Eruption

  • tried this mass gainer couple of times , did not gain anything but fat. to much sugar and fat , taste probably the best. pretty cheap for a gainer. this product may be good but for me , it did not work. i would rather stick to serious mass or super mass.
  • I wanted to gain some size and asked around which is the best mass gainer. Everyone I have talked to recommended Mutant Mass. They are not wrong and I absolutely love it. Im 5'11 and since 2014, I have gained 20kg from 67kg. Great taste and mixes very well. I have experimented with other brands but this one is definitely one of the best. Highly recommended.
  • I'm 5'8 69kgs before I started using this mass gainer. I've been very desperate to gain some good mass. In the beginning I was skeptical that it would actually work but I was dead wrong. I'm currently my 2nd bag and I've gained solid 6kgs of mass. You just have to watch out the massive flatulence at the beginning but your body adapts eventually but I noticed that you should have a bit to eat rather than an empty stomach. Since then I've never had any trouble with any toilet run. During training days. I'm taking this with 3 scoops in the morning with small leafy meal. 2 scoops at lunch time then 3 scoops straight after workout. On non training days, just 2 scoops in the morning. A serving of a normal protein shake then 2 scoops in the arvo. Nevertheless, I'm very very happy with this product and will use it again till I reach 78kgs+. Lastly, I've just purchased my third bag before writing this review! that's how much I love this. Thanks Sprintfit! The BEST pricing in NZ!
  • So far one of the best gainers i have ever had, taste is amazing, could also mix with frozen fruit and milk which gives you more calories and protein.
  • I think they have changed the formula or at least the taste of the triple chocolate, good product but liked the old taste better.
  • Great Mass Gainer! Have been taking this for the last month and have found great gains over this time. Tastes great but my only slight issue is mixing but I jus t shake for a little longer and it dissolves aventually.
  • Overall one of my favorite mass gainers, they give you a good amount of calories, carbs and protein. Most company's skip out on one or two of these 3 things. Mutant has been one of my go to brands for the last 6+ months, they give a quality product for a quality price.
  • I really liked the flavor of the MUTANT Mass. Tasted like cold hot chocolate. I liked the label with all the amounts of amino acids on the sides, really lets you know what you're getting. It also has great amount of carbs and potassium.
  • Giving this a try, workouts every 2nd day. 3 shakes a day, hitting the heavy weights :) Up about 4 kgs in little over a week with no discernable change in body fat. Make sure you do situps and cardio as it's easy enough to get a gut, and go hard people :)
  • Awesome product - I am a classic example that this stuff actually works. I have been using this for the last seven months, more than half way through my 3rd bag of Mutant Mass. My starting weight was 60KGS, I now weight in now at 76.5KG, lets see if i can reach 80kgs by the end of it. Train hard, eat well and Mutant Mass.

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