Reflex Nutrition Instant Mass Heavyweight – Mass Gainer – Over 1000 Kcal per Serving, 60g Protein, Creatine – High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 2 kg)

Price: £37.99 - £31.08
(as of Apr 30, 2026 21:35:36 UTC – Details)


Reflex Nutrition’s Instant Mass Heavyweight protein powder is developed for hard gainers and athletes seeking a quality blend of proteins and complex carbohydrates. With over 1000 calories per shake, this bulking protein powder formula fuels your body with substantial quantities of macronutrients for building and maintaining muscle mass.
Our protien blend combines four premium sources of whey protein with slow-releasing micellar casein, catering to both immediate and sustained amino acid delivery. The Whey Protein Concentrate is carefully processed to preserve its purity, while Hydrolysed Whey Protein is enzymatically treated for rapid absorption. Together with Native Whey, these form a full-spectrum protein assault that contributes effectively to muscle growth and recovery.
Instant Mass Heavyweight bodybulding supplement is crafted with a multifaceted carbohydrate matrix. This intelligent carb blend sidesteps the pitfalls of simple sugars and syrups, opting instead for a sustained-release energy supply – It’s the perfect partner for the long, intense workout sessions.
Each serving of protein supplements is also power-packed with 18 added vitamins and minerals, amplifying the nutrition profile and supporting your body’s demands through all phases of training – whether you’re prepping, pushing through, or in post-workout recovery, Reflex’s weight gain protein powder formula will help you achieve your goals.
Incorporated into this mix is creatine powder, scientifically proven to increase physical performance in successive bursts of short-term, high-intensity exercise, ideal for those aiming to dominate in their sport.
This high protein shake is available in two sizes to accommodate your training intensity and frequency (protein powder 2kg and protein powder 5.4kg).
Choose your flavour from a variety including traditional favourites and exciting new taste profiles (vanilla protein powder, strawberry protein powder, chocolate protein powder and more).
Is discontinued by manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 20.3 x 20.3 x 25 cm; 2 kg
Manufacturer ‏ : ‎ Reflex Nutrition Ltd
ASIN ‏ : ‎ B01E483MDK
Item model number ‏ : ‎ Instant Mass Heavyweight Protein
Country of origin ‏ : ‎ United Kingdom
Customer reviews: 4.1 4.1 out of 5 stars (929) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Engineered for Gains: This seamless protein shake mix is specifically formulated to accelerate muscle and weight gains and improve post-workout recovery, enhancing overall workout performance for the dedicated, hard gainer and serious athlete alike
Excellent Nutrition Profile: Packed with quality ingredients, each protein shake serving delivers over 1000 kcals, 200g of complex carbohydrates, 60g of muscle gain protein, critical EAAs, creatine, 18 vitamins and minerals (B12, B6, C, Iron, Zinc)
Outstanding Taste Sensation: Our Chocolate Perfection mass gainer flavour isn’t just a treat for your taste buds – it’s a deliciously creamy escape into indulgence with every sip, all while you are fueling your body for mass gain and muscle recovery
Optimal Timing for Maximum Impact: Consume Instant Mass Heavyweight high protein shake between meals for a positive nitrogen balance, 20-30 minutes post workout for best results or 45-60 minutes before sleep to aid overnight muscle maintenance
Trusted Quality Assurance: Reflex Nutrition’s promise to quality means whey protein powder from grass-fed cows – Protein Sources are Glutamine Peptides, Whey Protein Concentrate, Milk Protein, Hydrolysed Whey Protein
Produced in an Informed Sport Registered Facility – Suitable for vegetarians and Halal certified – Zero added sugars, artificial colors, or soy protein, assuring a conscientious choice of weight gainer for your muscle-building objectives

Product summary

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