Most powder gainers are too thick, too sweet, or bloated and uncomfortable for hours on end. I've been using ISO-Mass since GNC sold it and honestly there's no other weight gainer that comes close. I used to take two shakes a day and was able to gain 10-15 pounds a month on this thing. I've never had any luck with other gainers. It is a more liquid consistency, easy to mix and easy to dissolve. Yes, it's expensive, but when you look at the variety of ingredients it contains, you'll understand why. Not only is the protein blend amazing, but it also contains multiple types of creatine, NO precursors, beta-alanine, omega-3 fatty acids, vitamins, and other goodies. It should be a universal formula. This is the first tub I've bought in three years because I thought they weren't making it anymore. But it must have been that GNC just stopped wearing it. Anyway, I'm glad I found it.
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