

🏆 Bulk smarter, recover faster, taste better.
Reflex Nutrition Instant Mass Heavyweight is a premium mass gainer delivering over 1000 calories and 60g of multi-source protein per serving, enhanced with creatine and 18 vitamins & minerals. Designed for hard gainers and athletes, it supports muscle growth, recovery, and sustained energy with a rich chocolate flavor and clean ingredient profile—no added sugars or artificial nasties. Perfect for post-workout, between meals, or pre-sleep to maximize muscle gains.









| ASIN | B01E483MDK |
| ASIN | B01E483MDK |
| Age Range Description | Adult |
| Allergen Information | Contains: Egg may contain, Milk, Oat, Soy, Wheat |
| Benefits | Muscle Growth |
| Best Sellers Rank | 1,169 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 12 in Protein Nutrition Blends 33 in Diet Shakes |
| Brand Name | Reflex |
| Country Of Origin | United Kingdom |
| Country of origin | United Kingdom |
| Customer Reviews | 4.1 4.1 out of 5 stars (631) |
| Customer reviews | 4.1 4.1 out of 5 stars (631) |
| Diet Type | Halal |
| Flavour | Chocolate |
| Global Trade Identification Number | 05033579001500 |
| Is discontinued by manufacturer | No |
| Item Dimensions | 20.3 x 20.3 x 25 centimetres |
| Item Nype Name | HEALTH_PERSONAL_CARE |
| Item Weight | 2000 Grams |
| Item model number | Instant Mass Heavyweight Protein |
| Manufacturer | Reflex Nutrition Ltd |
| Manufacturer | Reflex Nutrition Ltd |
| Manufacturer Contact Information | Reflex Nutrition, Sea View Way, Brighton, BN2 6NT, UK |
| Manufacturer Part Number | 100044200030 |
| Material Type Free | Caffeine Free, GMO Free |
| Model Name | Reflex Nutrition Instant Mass Heavyweight | Mass Protein Powder |
| Model Number | Instant Mass Heavyweight Protein |
| Net Content Volume | 10.4 Litres |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Dimensions | 20.3 x 20.3 x 25 cm; 2 kg |
| Protein | 60 g |
| Protein Source | Whey |
| Recommended Uses For Product | During Workout, Post-Workout, Pre-Workout |
| Supplement Formulation | Multi-Supplement |
| Unit Count | 2000.0 gram |
C**D
100 percent works 100 percent tastes great
best protein shake I've tried by far, the chocolate flavour isn't to intense and the texture isn't to thick, blends up very nicely 100 percent would recommend for people that have problems finding a nice flavour or thickness, this one sits just right bang on will only be buying this from now on and you cant complain at that price its an absolute steal product does what it says and tastes great whilst doing its job
B**S
Great Taste...
If not a little thick, but then again, there's no real way around this. If you're going to try and cram over 1000 calories into a drink, then you will expect some thickness. To balance this, the chocolate flavour is delicious compared to some of the others i've tried. Mix it with a little milk and water and it's like a lovely milkshake. I use this to help top up my daily intake, sometimes rushing around all day in my job, I can't get access to some chicken / rice and yogurt with berries like some of these social media experts, so it's nice and easy to have a few heaps of this in a shake. As with all these protein shakes these days, it's quite expensive - but again, cheaper than some competitors. Seems to be working and helping with putting on weight / muscle, it's only been a month. Will definitely purchase again.
C**S
Reflex nutrition
Got my tub thanks . Why do you make the tub so big and only fill below half of it 🤷🏻♂️
J**N
Great product
Great taste, definitely helps you gain weight and muscle mass. Will be ordering again
U**1
Nope
Tastes like crap hard to mix and full of maltodextrin
K**Y
If you're buying, get the Chocolate!
It was ok. I had it on subscription. I stopped as I was never really eating that much to be "bulking" (maybe in my imagination) to ever need this. I stopped using as they started to send me Strawberry flavour instead of my selected Chocolate one. The Chocolate one is sooooo nice! Now I have two tubs of Strawberry nastiness at home propping up stuff in my room.
A**R
V/good
Very helpful with getting weight back on.
C**S
Protein
Good value for money
Trustpilot
1 week ago
2 weeks ago