Ive been reading many posts on diets and the 2 named carbs sups in the title are mentioned quite alot in diet examples etc . are they really that good as they are very cheap compared to many branded shakes, are there any down sides? and which of the 2 is beta.? adding this to protein shakes would work out alot cheaper than the all in one shakes.. and in this fanancial climate every penny saved is a bonus. lol. thanx for any advise.