Was taking 4IU/ day of the Rips in the beginning of the year and have nothing but great things to say about them.. Started using Hygs about halfway through the year and found they are much cleaner,the sides aren't as harsh, I didn't look as puffy ie didn't retain as much water weight and they're much more potent.. Had to knock my daily down to 2IU's.. Happy with the Hygs at the moment..