Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Vanilla Flavour, 16 Servings, 5.45KG

With weight training and a very physical job I need a ton of calories (around 4000 a day) this mass gainer definitely helps, I find it tastes better with semi skimmed milk than water, and totals more calories consumed with 2 servings. The scoop is quite bigger, larger than what you'd used you put detergent in your washing machine, and the dose is 2 a day, you could just have one after a workout, but I have one at work around 10-11am which helps feel a gap well and being a shame is easier than food or snacks. I got the vanilla one, it tastes a tad different to the normal whey protein by ON, sweeter maybe but after a first few tries it's fairly nice, I don't use a blender just a shaker ball, and about 600ml of milk, it does a clump a bit and needs several shakes between a few swigs. Put the milk or water in first (this is common knowledge) but try and shake it hard/drink quick after dropping the powder in as the longer it fits the more it'll clump at the bottom and it's not fun trying to consume the gloop at the bottom, messy. Or just don't be lazy like my and blend it, might come out better.

I have been using this protein for a long time now and its in my opinion one of the bests. I like the vanilla flavour which if you combine it with milk you barely notice is a protein shake, compared with other brands which can taste awful. I then add some strawberries and mix it together and it tastes even better than a strawberry milkshake from starbucks. Definitely recommend it after or before the gym and will get the calories going for a good bulk. The only downside is it has many carbs but that's not any different with other protein brands.

Great for muscle building, decent priced, lasts a while, flavour isn't the best but still good enough. Been using this for over 2 years now and still seeing results.

This mass is heavy duty, there's no other way to put it. I bought the vanilla flavour, unfortunately I did actually prefair the smaller tub I purchased before hand. Which was strawberry. I thought I needed a change and went for the biggest bag of vannila instead. Oops. If there's a next time I'll go for strawberry! Serious mass Tastes great if your certain on your favour choice. personally as I've mentioned. Vannila wasn't right for me as it got a bit too sweet. However, if you want to gain weight and your dedicated to this route of action, then serious mass is a good option. My advice is to try smaller tubs before dedicating to the huge bag. Lastly, great price! This stuff is super expensive anywhere else (from what I've seen). It also didn't give me any nasty gas.. as some previous shakes have.. no name calling.. *cough* MUTANT MASS!! *cough* Great product over all! Fast results :)

The only product worth using if you struggle to put on any weight. I am a hard gainer and have tried many weight gain products in the past and this one is the most effective. I have tried many cheaper options to try save money as it doesn't last very long using the full sized portions but nothing else compares. Taste is good and when mixed with a blender is very smooth and easy to drink. As a pure weight gainer with all the additives and vitamins required for successful weight gain this is the one to choose. Just don't think you can magically drink a couple shakes and miss meals and get good results. You must continue to eat regular meals and consume a shake or 2 in addition to those meals. I recommend for extreme hard gainers who have a hard time gaining any lbs. Portion can be split in half and taken twice to reduce size of each shake if required. Don't bother with any other gainer. This is the 1st review I have chosen to write as I feel the product deserves it most. Arrived in top condition too

It helps a lot. I gained 5kg in just one month with this wonderful product

Note: I used this product for approximately a year. Firstly, I will assume that this product is the legitimate serious mass that you would obtain if ordered from the optimum nutrition (A BIG IF.) The levels of sugar intake per serving are too high. This causes a massive blood sugar spike and your insulin can't keep up meaning over time your insulin becomes less responsive to blood sugar increases. Sound familiar? That's diabetes and if you really want it hell this product will get you there. People abstain from Sugary foods in order to lower their risk of diabetes and chocolate for example contains a fraction of the sugar in this product! The carbohydrates are entirely disaccharides (two monosaccharides like glucose) meaning they digest very quickly causing this bloody sugar spike. Can leave you feeling very drained when the sugar rush from the shake wears off. Secondly, this is not the legitimate serious mass basically. It's sold way below the market price of serious mass and we all love a good deal but this product differs from the actual serious mass. The labeling is subtly different to the real stuff and the colour of the packaging slightly wrong. You would never notice normally but I thought something was wrong and looked into it thoroughly. I found myself getting ill regularly whilst taking this stuff and any gains were short lived (basically just the carb load effect of muscles getting larger due to the sugar intake into the cells.) I won't even get onto the effects it has onto the intenstines and your stomach but they aren't pretty, can get around this by splitting up servings and taking at different times but you don't ideally want to be splitting up a post workout shake because well.... it is for after a workout. Best case scenario- this is a company that is not optimum nutrition selling a decent and similar product under the name of ON in order to gain custom it would not have been able to get on its own brand name Worst case scenario- (and the most likely scenario) It's a third party company selling something that differs greatly from ON at a price far lower and can afford to do so because the ingredients are substandard and possibly dangerous and saturated with chemicals. (Looking through other reviews it seems other people have had similar experiences and yet many people still continue to buy the product. TRY PRO GAINER BY OPTIMUM NUTRITION, yes it is expensive but superior in every way and far more effective. Made my best gains on that stuff in my 3 years of lifting)