A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst in Chocolate flavor, featuring a red cap and a black label with red and blue text.
A bottle of Allmax QuickMass Rapid Mass Gain Catalyst in Chocolate Peanut Butter flavor, featuring a black container, red cap, and a black label with red, white, and blue text.
A black plastic bottle of Allmax QuickMass Rapid Mass Gain Catalyst with a red cap, featuring a black label with red, white, and blue text and a pink splash graphic on a white background.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst powder with a red cap, on a plain white background.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst with a red cap, shown on a plain white background.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst dietary supplement in Strawberry-Raspberry flavor, featuring a red cap and a black label with red, white, and blue text.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst dietary supplement with a red lid and a chocolate peanut butter splash graphic on the label.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst powder supplement with a red cap, on a plain white background.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst with a red cap, featuring a black label with blue and red text and a splash graphic.
A black plastic tub of Allmax QuickMass Rapid Mass Gain Catalyst with a red cap, shown on a plain white background.
A 10 lb bag of Allmax QuickMass Rapid Mass Gain Catalyst in chocolate flavor. The packaging is predominantly black with red side panels and features the prominent blue and red 'QuickMass' logo.
A 10 lb bag of Allmax QuickMass Chocolate Peanut Butter powder, a rapid mass gain catalyst, featuring a black and red packaging design with blue and white logo text.
A 10 lb bag of Allmax QuickMass Rapid Mass Gain Catalyst in Strawberry Banana flavor. The packaging is primarily black with red side panels and features the prominent blue and red 'QuickMass' logo.
A 10 lb bag of Allmax QuickMass Rapid Mass Gain Catalyst cookies and cream flavor, featuring a black and red packaging design with blue and white logo text.
A 10 lb bag of Allmax QuickMass 1010 Calorie Mass Gainer in Vanilla flavor. The packaging is primarily black with red side panels and features the 'QuickMass' logo in blue and red, along with '64 Grams Protein' and '1010 Calorie Mass Gainer' text.
A muscular man in a black Allmax tank top holds a tub of Allmax Quick Mass Rapid Mass Gain Catalyst powder next to its black and red retail bag. The background is black with a dark hexagonal pattern, and the text 'RAPID MASS GAIN CATALYST' is displayed at the top, along with certification logos at the bottom.
Allmax QuickMass 1010 calorie protein powder bag shown next to a muscular man lifting weights in a gym setting, with text highlighting key product benefits.
Promotional product graphic for Allmax QuickMass dietary supplement. The left side features white panels with red headers and black text detailing the directions and two phases of usage (Rapid Mass Gain Phase and Mass Maintain Phase).
A bag of Allmax QuickMass Rapid Mass Gain Catalyst supplement shown next to a verified 5-star Amazon review overlay, with a muscular man training in the background.
Promotional graphic for Allmax QuickMass Rapid Mass Gain Catalyst, showing five black and red bags of lean mass supplement powder against a dark hexagonal background with the brand logo and text 'AVAILABLE IN 5 DELICIOUS FLAVOURS'.
QM-certs-1

Calories

1010

Sugar Added

0

Carb:Pro

3:1

Rapid Mass Gain Catalyst

Allmax QuickMass: Mass Gainer

Sale price $34.99 Regular price $44.99 Save 22%
Size:3.5 lbs
Flavor:Chocolate
QM-certs-1

Calories

1010

Sugar Added

0

Carb:Pro

3:1

How ALLMAX QuickMass Supports Caloric Surplus and Lean Muscle Growth

ALLMAX QuickMass is a premium clean-bulking mass gainer engineered around a scientifically formulated 3:1 carb-to-protein ratio. Each 4-scoop serving delivers 1,010 calories, 64 g of sustained-release protein from 100% whole protein sources (no non-protein aminos), and a complex carbohydrate blend featuring sweet potato, rolled oats, quinoa, Cyclo-D™ highly branched cyclic dextrin, and waxy maize starch. QuickMass is kosher, dye-free, zero-added sugar, and lab-tested for purity and potency.

Key Nutritional Stats (Per 4-Scoop Serving):

  • 1,010 calories per full serving (4 scoops / 265 g)

  • 64 g sustained-release protein — 100% whole protein sources, zero non-protein amino acids

  • 3:1 carb-to-protein ratio — the research-backed ratio for lean mass gains

  • Complex carbohydrate blend — sweet potato, oats, quinoa, Cyclo-D™, waxy maize

  • Prebiotics and digestive enzymes — to support gut health and reduce digestive discomfort

  • 24 added vitamins and minerals — to support increased micronutrient demands during muscle growth

  • Flavors: Chocolate | Cookies & Cream | Chocolate Peanut Butter | Strawberry Banana | French Vanilla

  • Sizes: 3.5 lb | 10 lb

How QuickMass Supports Lean Muscle Growth

Building mass requires a consistent calorie surplus, and getting there from food alone is a challenge for hard gainers and athletes with high metabolic demands. QuickMass provides a structured, nutrient-dense calorie surplus designed to support lean mass rather than excess fat.

  • A randomized controlled trial by Rozenek et al. found that participants consuming a high-calorie carbohydrate and protein supplement (2,010 kcal/day) gained 6.4 lbs of fat-free mass over 8 weeks of resistance training, significantly more than the unsupplemented control group, demonstrating that caloric and protein surpluses meaningfully accelerate lean muscle gains beyond training alone.

  • A randomized controlled trial published in the Journal of Nutrition found that co-ingesting carbohydrate and protein hydrolysate during exercise increased whole-body protein synthesis by 29% compared to water only. During subsequent overnight recovery, whole-body protein synthesis remained 19% greater in the supplement group, confirming that combined carbohydrate-protein intake supports both performance and recovery-phase muscle building.

Mass Gainer or Whey Protein: Which One Is Right for You?

Whey protein is designed for individuals who meet their daily calorie needs from food and want to supplement protein intake specifically. A mass gainer like ALLMAX QuickMass is designed for individuals who consistently fall short of their total daily calorie requirements: hard gainers, athletes with very high metabolic demands, or those who cannot eat enough whole-food volume. If you are gaining weight but not muscle, a mass gainer adds structured calories. If you are hitting your calorie targets and just need more protein, Isoflex Whey Protein Isolate or ALLMAX Hexapro is the better fit.

What Sets the CARBPLEX Carbohydrate Blend Apart

Most mass gainers rely heavily on maltodextrin and sugar, which are fast-digesting carbs that spike blood glucose and contribute to fat gain. QuickMass uses CARBPLEX: a blend of complex, long-chain carbohydrates including sweet potato, oat fiber, quinoa flour, Cyclo-D™ (highly-branched cyclic dextrin), and waxy maize starch. These absorb more slowly than sugar, providing sustained calorie availability without blood sugar crashes.

Stacking Recommendation

QuickMass pairs well with these complementary ALLMAX products:

  • ALLMAX Creatine Monohydrate Powder — add 5 g of pharmaceutical-grade creatine daily to drive the strength and power output gains that a calorie surplus alone cannot deliver.

  • ALLMAX Glutamine Powder — supports post-workout muscle recovery and gut health as training volume increases alongside your mass-building phase.

  •  ALLMAX Impact Igniter Sport Pre-Workout — the clean, Verified for Sport pre-workout option for training days when you want performance support without the full stimulant load of the Xtreme formula.

  •  ALLMAX Omega-3 Fatty Acids  — support cardiovascular health, reduce exercise-induced inflammation, and enhance nutrient absorption alongside your daily training and mass-building stack.

Who Should Take ALLMAX QuickMass?

  • Hard gainers and athletes who consistently struggle to consume enough daily calories for muscle growth

  • Athletes in team sports or strength sports requiring significant body mass

  • High-metabolism individuals who burn through calories quickly and need a practical, calorie-dense solution

  • Those who want a clean-bulking mass gainer with no added sugar, no dyes, and digestive support built in

  • Anyone looking to gain muscle mass who wants structured macro support rather than just a protein shake

  • 5 stars: 21 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
C
Customer R Hartmayer

Product arrived on time. The delivery service (fed ex ground) needs to deliver pkg to apartment door and not leave in lobby…

K
Keith Davies
Best all around protein powder for gaining

Best flavor, great consistency, all of the best ingredients from the protein and carb side. This one has it all!

M
Mark Z
Customer review

Taste great

E
Eric G
Customer review

Great

A
Andrew W
Customer review

Was very pleased. Used this while on a bulk. Good product for the money.

N
Naomi
Customer review

Just what I was looking for.
Trying to just get some extra weight on. I really enjoy the flavor and it's doesn't give me that to full feeling. Great way to drink what I need, when I don't feel like eating.

G
Golf Addict 911
Customer review

No sugar added, great taste
Very good protein mass gainer. Easy on stomach and taste great

N
Noah S
Customer review

This stuff is great. I bought the chocolate and it tastes good, mixes well. I would have two scoops for breakfast with 8 oz of milk and 6 oz of water or so.

W
William S.
Customer review

This stuff is packed with results. Follow the dosages, and you WILL put on mass with a workout regimen. Worth the price.

F
Felipe Gallegos
Customer review

My high recommendation for clean bulking! The flavors to this mass gainer never disappoint and it really doesn’t make you feel bloated

Y
Yaris T
Customer review

Taste wise it’s really really good. The banana and strawberry is the perfect combination, not too sweet like other flavors and it does not give you that strange after taste that protein uses to have. It works Really good of your looking to gain some lean mass. Had tried al the other flavors but this is definitely my favorite one. Overall Really good protein.

J
Joey A
Customer review

Favorite protein to date !! Flavor is on point. Been stuck on this for about 2 years now and can not find another to replace. AMAZING!

R
Rosemary S
Customer review

I really love this product! I highly recommend it for all those people who want to gain weight like me. It's been a few days since I got it and I already gained 2 lbs :)

F
Frank C
Customer review

My son is trying to go up a weight class during wrestling season and Quick Mass has helped pack in size and muscle.

E
Ernest P
Customer review

Amazing product, taste is sweet and great with Almond Milk!

K
Kindle C
Customer review

This product is the best if you want to gain weight. It is a must if you want to grow and add egg whites with this and you are ready to go!! Get it!!!

G
Gabe Peña
Customer review

I've been using QUICKMASS for years. It always struck me as one of the most delicious mass-gainers out there (favorite flavor is chocolate). I definitely appreciate how this gainer isn't full of nonsense simple calories, rather a specifically formulated blend of complex carbohydrate sources. Not once did I ever experience digestive distress or "bubble guts" with this gainer (which is hard to say of most others).
As a 320 lb pro-strongman who has used QUICKMASS for years, I am beyond happy with the job it has done and look forward to its continued use in my supplementation regimen.

J
Joseph O
Customer review

My go-to for thick season! This is a MUST, clean calories and doesn’t make you feel bloated. C&C and vanilla are the flavors I always go with

J
Josh Wade
Customer review

Quickmass is my go to for off season post workout replenishment! Besides the high quality protein and low fat it has slow digesting quality carb sources from oat and sweet potato flour. I mix one scoop of cookies and cream Quickmass with one scoop of Choc PB Isoflex and boom, an amazing post workout nutritious treat!

T
Tomy
Customer review

My favorite gainer I take in offseason for a good mass gains before a prep for my next competition. I love the ratio 3: 1, perfect for add fast calorie in your diet. The flavors are tasty!

D
Dave
Customer review

Best testing compared to other weight gainers
I recommend the cookies and cream.

S
Sage

Awesome product. I’m currently having 2 scoops per shake twice a day, both with meals and I must say results are definitely noticeable. Size and strength are ascending while not feeling bloated. I’m also taking ALLMAX Creatine Mono on the side to help add some extra room so the muscles can grow.

A
Alfreda McRae

Taste great

A
Alfreda McRae

Great

A
Alfreda McRae

Was very pleased. Used this while on a bulk. Good product for the money.

A
Alfreda McRae

Just what I was looking for.

Trying to just get some extra weight on. I really enjoy the flavor and it's doesn't give me that to full feeling. Great way to drink what I need, when I don't feel like eating.

*These statements have not been evaluated by the food and drug administration. This product is not intended to diagnose, treat, cure or prevent any disease.