I dont know what other say, but this is an excellent protein powder from a well trusted company. No side effects after consumption, no GI, no Diarrhea, no worms / bugs in the powder, no nothing. I have tried many different proteins over the last 10 years and in my opinion, only two brands stand out in the market. Dymatize and ON. ISO 100 is a great protein .... one of the best if i may say. Mixing wise, it mixes super well. Flavor is great -at least the gourmet chocolate that i tried. Next one is Vanilla and though i have nt tried it yet it smells super good. Might be a little pricey for a protein but i prefer paying for a quality protein rather than experimenting with other brands and uknown ingredients. All in all, i highly recommend it and i would buy again.....have two more 5-pound containers to finish first