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Reflex Instant Mass PRO

Instant Mass PRO

The highest quality weight gainer on the market! suitable for athletes from a variety of sports and ideal for building lean muscle mass. Only the most premium grade carbohydrate and protein sources are used making it the ideal choice for people who want to build hard lean tissue without bloating, gaining lots of body fat, or damaging their health by taking high sugar supplements.

Based around Reflex's own Quattro time released protein, blended from whey protein, hydrolysed whey protein, native whey protein isolate and micellar casein and containing magnesium, zinc and vitamin D3 to support protein synthesis.

  • 524 calories, 54g protein, 60g carbohydrates per serving
  • A near perfect balance of 50/50 protein and carbohydrate
  • Includes the Reflex Quattro® time-release protein blend
  • Delivers four strains of friendly bacteria

From £33.50

Rated 4.2 / 5 with 5 ratings


The weight gainer market is running amok. Big supplement companies have capitalized on this area, and are persistently throwing out lavish claims of how you can add huge amounts of mass with their supplements. Desperate and always seeking that cutting edge to take you to the next level, you can fall victim to these radical proclaminations. Yet, as humble as ever and following their immaculate manufacturing procedures, Reflex Nutrition have taken a stand of prominence.

It had gone far enough. Already arguably producing the finest quality whey protein blends on the market, Reflex decided to shock the supplement industry and set the standard for excellence on the weight gain market as well. How would they do this? By providing such an elaborate, advanced formula that was not only versatile and diverse in its use, but also provided the ultimate ingredients necessary for optimal performance. First to be revamped would be the selection of only the finest and most desirable carbohydrate choice for any serious athlete. It was an obvious yet expensive option, yet Reflex refuse to do anything less than superb. So it would be.

Most weight gains on the market today utilize maltodextrin as their primary carbohydrate source, boasting about its potency. While this high G.I carb source was reasonable for hard gainers, it didn't take into account what was required for an advanced bodybuilder or athlete, looking to add rock solid, lean muscle mass and minimize fat gain. It also didn't ensure the ample release of prolonged carbohydrates, necessary for serious athletes looking to optimize their performance. The obvious solution was to add a complex carbohydrate source, yet this was an expensive and also elaborate processing procedure. Refusing to accept anything less than the best, Reflex Nutrition shocked the industry and formulated Instant Mass with only the finest quality, slow release qualities of organic barley and oats. Note that we said organic. It's that higher calibre.

The obvious solution from there on was to include a beautiful spectrum of undenatured proteins, for effective surges of muscle building amino acids into the muscles and severely enhancing hyperaminoacidemia, blasting protein synthesis into extremely effective levels. The inclusion of their trademark whey proteins, egg white isolate and micellar casein ensured fast, medium and slow release amino acids into the bloodstream for best results. The three most sought after, muscle building ingredients on the market. In one formula.

The addition of a comprehensive selection of naturally occuring vitamins and minerals, including fibre and digestive enzymes make this the absolute penultimate formula in sports nutrition. Instant Mass has threw down the gauntlet.

This product also features in the following categories:

Reflex Nutrition
Weight Gainers

Take 136g, approximately 5 scoops as required throughout the day to provide a nutritious high calorie shake to assist lean muscle gain.

Ideally add servings between meals 2 hours away from each meal.

Quattro® protein blend (milk ultra-filtered whey protein, milk protein concentrate (80% micellar casein, 20% whey)

milk native whey protein

milk hydrolysed whey protein (degree of hydrolysis 30%))

peptide-bonded glutamine (derived from wheat protein)

carbobiotics™ low GI carbohydrate complex (oat flour, barley flour, trehalose, fructooligosaccharide)


egg white protein isolate


natural colourings (fat reduced cocoa powder (chocolate varieties only)

betanin (strawberry variety only)

beta carotene (banana & vanilla varieties only))

magnesium citrate

thickener (carboxymethyl cellulose)

artificial sweeteners (acesulfame k, sucralose)

emulsifier (soya lecithin)

ascorbic acid (vitamin c)

digezyme® digestive enzyme complex (amylase, cellulase, lactase, lipase & neutral protease)

tocotrienols as deltagold® (35% total tocotrienols of which 84-92% delta-tocotrienols, 8-16% gamma-tocotrienols) obtained from annatto

zinc monomethionine

lactospore® (bacillus coagulans))

sodium borate

copper aspartate

pyridoxine hydrochloride (vitamin b6)

l-selenomethionine (selenium select®)

chromium picolinate

bifidobacterium bifidum

lactobacillus acidophilus

lactobacillus rhamnosus


Rated By: Mark Dance Rated 5

Taste is exceptional, not too sweet, not too thick and not over powering like some of the milkshake type products out there that you get sick of when you drink em 2 or 3 times a day

Rated By: hamza Rated 3
gud job

Rated By: Cheekygit Rated 4
Picked up the chocolate flavour and I have to say the taste is great......if you like an oaty taste! Im not using full measures as Im only looking to add an extra 500cals per day. Been using this for a week now and ive put on far so good!

Rated By: TNR22 Rated 4
Have just finished first tub of this - i had Strawberry flavour - pretty awful taste at first but after 3-4 days it becomes quite normal as you get used to it - i would suggest adding 100ml extra water or milk to reduce thickness.
I actually lost half a stone over the 2 weeks using it but i had been burning a lot more calories at the gym than normal - weight is gradually starting to increase and have just purchased the big 5.4kg bag - better value for money 59.99.
Would recommend this product to anyone trying to build muscle rapidly - although i lost weight, i have increased muscle size and now have more definition. Will post more after completing this bag - should last 1 month.

Rated By: John Principal Rated 5

Mixes well, taste is pretty good, but nothing outstanding.

As a weight gainer for me, im 35, its perfect. Low in simple carbs, low in sugars, high in protein, and just enough calories to put a bit of mass on and not get fat

Please give your own feedback and suggestions

Posted By: matt Posted: 21/10/2010 12:52:50
Hey guys. Would you agree that going on instant mass, instant whey, creatine uptake system and androbolix is a good combonation of supplements for improving on muscle, adding size and strength If so what would recommend to take before a workout, after a workout and throughtout the day and also on none training days Cheers!

Posted By: Admin
Hi Matt

Yes the reflex brand is incredibly good quality supplements. A supplement routine as extensive as that will surely yield good gains in size and strength.

Regarding pre workout drinks, our most potent one is either Jack3d or ssin juice, however if you train late evenings these may have too many stimulants in there for you so try gaspari super pump 250.

Post workout use after glow. It is our best selling recovery drink and without a doubt the most comprehensive post workout drink out there. over 7g glutamine, loads of BCAAs and whey protein isolate as well as glucose polymers, it simply is the fastest acting recovery drink.

Throughout the day you can use the supplements you suggested. Instant mass in between meals and instant whey to top up protein content of a meal .

Posted By: Sidraa Posted: 06/12/2012 15:25:04
Hi i am 19years old female and i weight around 8.9 stones. However because i am quite tall , i really to gain more weight. I have been trying for ages to gain weight, but havnt succeeded. I would like to gain weight on my legs , hip and chest area. I have bought instant mass vanilla flavor. is this a good option for me ( i dont go gym, but i do walk a lot) Also how long should i take it for and how many scoops a day shall i take it for i really want to gain a healthy weight, because currently i am too skinny. Please could you help Thank you

Posted By: Admin
Hi Sidraa, For yourself i would start taking one shake a day containing 3 full scoops. This is a good starting point to see how well you gain weight, if this does not work well for you then start taking 2 shakes a day at 3 full scoops. I would be cautious with weight gain as if you do it too fast you could start putting unhealthy weight on so be patient and take it slowly. You can take instant mass for as long as you desire, once you get to a weight you are happy with then drop your serving size to 2 scoops a day, taking either one or two shakes a day. Watch your body and see how you react to the weight gain, if you gain it too quickly then cut the amount of scoops you are having in each shake to slow down the weight gain. Luckily with instant mass it has a clean carb source and is the healthiest weight gainer you can find, so be consistant with it and you reach the desired size you want.

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