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MUTANT MASS Triple Chocolate, 15lb - SupplementSource.ca
MUTANT MASS Chocolate Fudge Brownie, 15lb - SupplementSource.ca
MUTANT MASS Vanilla Ice Cream, 15lb - SupplementSource.ca
MUTANT MASS Cookies & Cream, 15lb - SupplementSource.ca
MUTANT MASS Strawberry Banana, 15lb - SupplementSource.ca
MUTANT MASS, 15lb Cookies & Cream Nutrition Panel - SupplementSource.ca
MUTANT MASS, 15lb Nutrition Panel - SupplementSource.ca
MUTANT MASS Triple Chocolate, 15lb - SupplementSource.ca
MUTANT MASS Chocolate Fudge Brownie, 15lb - SupplementSource.ca
MUTANT MASS Vanilla Ice Cream, 15lb - SupplementSource.ca
MUTANT MASS Cookies & Cream, 15lb - SupplementSource.ca
MUTANT MASS Strawberry Banana, 15lb - SupplementSource.ca
MUTANT MASS, 15lb Cookies & Cream Nutrition Panel - SupplementSource.ca
MUTANT MASS, 15lb Nutrition Panel - SupplementSource.ca

MUTANT MASS, 15lb

by Mutant

High-calorie gainer for serious muscle and size growth.

  • Massive Calories: Over 1,000 calories per serving to fuel extreme gains.
  • Clean Carbohydrates: Provides sustained energy and replenishes glycogen stores.
  • Added Healthy Fats: MCTs and essential fats for optimal hormone support.
Save 24% Save 24%
$149.95 CAD
$149.95 CAD - $149.95 CAD
$149.95 CAD
$113.99 CAD
$113.99 CAD - $113.99 CAD
$113.99 CAD
15.0lb | $7.60 CAD / lb
Flavour Chocolate Fudge Brownie
Free shipping over $99, ships from Canada, Canadian authorized, and 30 years serving Canada
Shipping & Returns

Free Shipping on Orders over $99*: Expedited Premium Shipping - Add $99 or more worth of items into your cart (before taxes, fees & after discounts/promo codes), smaller orders are charged a flat rate $9.95*. Please note that post-purchase add-ons cannot be used to reach the $99 Free Shipping threshold.

Rural/Remote areas: Certain locations, which are determined by our shipping providers, do require additional shipping charges. These areas do not qualify for flat rate shipping or free shipping. If this is the case, we will email you before shipping your order.

Please review our Shipping Policies for complete details.

Natural Product Number Info

In Canada, all natural products must be issued a product license by Health Canada. This product number is known as a Natural Product Number or NPN. Products with this license have been assessed by Health Canada and have been found to be safe, effective and of high quality under their recommended conditions of use.

The NPN for this product is: 80094572

Disclaimer

The products and the claims made about specific products on or through this site have not been evaluated by SupplementSource.ca or the Canadian Food Inspection Agency (CFIA) and the Department of Health Canada (Health Canada) and are not approved to diagnose, treat, cure or prevent disease. The information provided on this site or any information contained on or in any product label or packaging is for informational purposes only and is not intended as a substitute for advice from your physician or other health care professional. You should consult with a healthcare professional before starting any diet, exercise or supplementation program, before taking any medication, or if you have or suspect you might have a health problem. SupplementSource.ca is not responsible for any statements or claims that various manufacturers make about their products or the general information provided for each product on this website. We cannot be held responsible for typographical errors, product formulation or label changes. Please consult with your own physician or health care practitioner regarding the suggestions and recommendations made on SupplementSource.ca and especially before using any product sold on this website
The displayed price per unit is an estimate only and should be used as a general guide. Variations such as flavour, size, or other product differences may affect this calculation. For the most accurate and up-to-date information, please contact us at customerservice@supplementsource.ca.

Source Certified

Products available at SupplementSource.ca are sourced directly from brands or authorized distributors in Canada or the United States. Products are stored and shipped directly from our climate-controlled warehouse. SupplementSource.ca does not allow 3rd-party resellers on its website.

Mutant MASS is the ultimate gainer for athletes who train hard and need serious fuel to build size. Each serving delivers over 1,000 calories with a blend of proteins, complex carbs, and healthy fats to drive muscle growth and recovery. It’s specifically formulated for lifters who struggle to gain weight or want to break through plateaus with clean, balanced nutrition.

The advanced protein matrix features fast and slow-digesting sources like whey concentrate, isolate, casein, and milk protein—ensuring continuous amino acid release. Combined with a rich carb blend and essential fats, Mutant MASS supports rapid recovery and steady muscle-building energy all day long.

Whether you’re bulking up, training for strength, or simply trying to add solid size, Mutant MASS delivers everything you need in one convenient, great-tasting shake. It’s engineered for true hardgainers who want big, powerful results.

Key Benefits

  • Over 1,000 calories and 56g of protein per serving.
  • Supports lean mass and muscle recovery.
  • Balanced carb-protein-fat ratio for sustained growth.
  • Delicious, rich flavours with smooth mixability.

Ideal For

  • Hardgainers needing high-calorie nutrition.
  • Bodybuilders focused on size and strength gains.
  • Athletes recovering from intense training cycles.
  • Anyone struggling to consume enough daily calories.
  • Those wanting a complete meal replacement shake.

Frequently Asked Questions

Q: How many servings are in the 15lb bag?

A: Each 15lb bag provides roughly 25–30 servings, depending on your scoop size.

Q: When should I take Mutant MASS?

A: Take after training, between meals, or before bed to support continuous muscle growth and recovery.

Q: Is it suitable for beginners?

A: Yes, Mutant MASS is great for anyone needing extra calories to gain size safely and effectively.

Q: Can I mix it with milk instead of water?

A: Absolutely—mixing with milk increases calories and makes an even creamier shake.

Q: Does Mutant MASS contain creatine?

A: No, it’s creatine-free, so you can stack it with your preferred creatine supplement.

Summary / TL;DR

Mutant MASS 15lb delivers over 1,000 calories, 56g of protein, and balanced carbs and fats to support rapid size and strength gains. Designed for hardgainers and serious athletes—big nutrition, massive results, best price in Canada.

Actual nutrition information may vary between product types and/or flavours.

  • 5 stars: 36 (90%)
  • 4 stars: 4 (10%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
S
Sonya G.
My husband made me buy it

He says I’m too skinny, but I really do love it. I use it between meals to help increase my calorie intake.

C
Colby G.
Amazing flavour

It was delicious. Ordered both the fudge and milk n cookies flavours and they both rock. Will see how the caloric and protein content fares in a few months but the taste is truly great so it’s fun to enjoy!

a
alexandre l.
Yeah pretty good!

The taste is pretty good, and it mixes very well. At the price at which I got it, it definitely makes it worth it!

S
Scout

Fast shipping and good service.

P
Peter R.
Always great

Mutant is always my go to and has been for years

R
Ross P.
Great for Protien and Hot Chocolate

I have been using Mutant Mass for a few years now and was happy to find that it is Canadian and I am glad to continue to support Canadian. I like it because it doesn't have the usual protein flavor and tastes more like a chocolate smoothie. It even makes a great Hot Chocolate mix!

J
John A.
Tastes Great

Purchased the chocolate fudge brownie mass gainer... Was really surprised how tasty it was....
This product is handy. If you need to eat 4 thousand or more calories a day, it can get rough trying to meal plan and eat that much. It can me so tiring continually eating...
At least this takes a meal out of the mix...
Works well, tastes great. Would buy again!

R
Rajan T.

Product is accurate as described

K
Kyle C.

10/10 as per usual, Supplement Source never misses! + random goodies included :)

C
Ché R.
Satisfied customer

Got my package delivered on time with some holiday freebies. Will definitely order again!

T
Tania I.C.R.
Good product

Good

D
Denys A.
Good

Ultra fest delivery, good product. 👉💪😎

A
Alonso C.
Fast and free shipping

Protein and Animal Pak multi arrived in no time, love the promotions and clearance sale, that’s a plus ..!

L
Les J.

Great shot of protein before workout with a very pleasant taste.

S
Sudhir S.
Good product for bulking..

Good results

R
Rick T.
Great Product

Great taste and good mixing. Highly recommend this product!

T
Thomas L.
Mutant mass

Tastes great mixes good price is good

D
Dustin
Excellent product.

2 weeks using it so far and already up 5 pounds. Ix2019,m very happy with this product

D
Dustin S.
Excellent product.

2 weeks using it so far and already up 5 pounds. I'm very happy with this product

s
shaun j.
Yummy

Tastes great! Mixes easily

C
Conner S.
Great

i’ve tried almost all the flavours, aside from chocolate and they all taste pretty good. they mask the usual protein flavour a good amount, and when vanilla can be mixed with other things to make it more variable. I usually drink 4 scoops 4 days a week and 2 scoops 2. it seems to last about 3-4 months for 2 bags. only downside is it can be a bit nauseating, though that might just be a me issue.

C
Conner S.
Great

i've tried almost all the flavours, aside from chocolate and they all taste pretty good. they mask the usual protein flavour a good amount, and when vanilla can be mixed with other things to make it more variable. I usually drink 4 scoops 4 days a week and 2 scoops 2. it seems to last about 3-4 months for 2 bags. only downside is it can be a bit nauseating, though that might just be a me issue.

J
James C.
Love the taste

Love the strawberry one, very smooth and dissolves completely

P
Puneet A.
Vanilla flavor is great

Pretty good, Only took half the servings but it's pretty filling.

C
Christopher S.
Great deal

I’ve used Supplement Source for some time now and it never disappoints. I always get great deals and I like that they always throw in some freebies for me. Lee up the good job. Chris

C
Christopher S.
Great deal

I've used Supplement Source for some time now and it never disappoints. I always get great deals and I like that they always throw in some freebies for me. Lee up the good job. Chris

M
Marian D.d.t.
Awesome!

Been taking this mass gainer 3 years now and it never disappoints.

K
Kyle J.
Mutant mass gainer

Tastes great. Helps to supplement nutritional goals. I was able to gain 25 pounds of lean mass over a year and a half after I found mutant mass.

C
Chris l.
Good but tough on the stomach

It’s got all the makings of being a great gainer but it’s just too hard on my stomach, I have found if I only do one scoop once a day I can handle it. Other gainers I would do 2 scoops 2-3 times a day.

J
Jonathan S.
Best gainer, period!

Superb gainer, not too sweet, not full of sugar, great mixability, includes most gain supps also! Only gainer I've been using for a while and wouldn't go back!

a
allen s.
5

Awesome 💪 I like it so good

M
Martin L.
Awesome

The customer service was amazing

J
Jessica
Delicious

I ordered this mainly for my Fiance which he loves it! havent been on a mass gainer for years and just got back into the swing of it. I used to work for a supplement company so i have had my fair share of protein testers and mutant mass stood out not only for quality but for taste
Every now and then i steal a scoop because it is so yummy

J
Jessica
Delicious

I ordered this mainly for my Fiance which he loves it! havent been on a mass gainer for years and just got back into the swing of it. I used to work for a supplement company so i have had my fair share of protein testers and mutant mass stood out not only for quality but for taste Every now and then i steal a scoop because it is so yummy

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