My rating is based on taste! I can't comment on nutritional value as I presume it does what it says on the tin (or packet in this case) but the taste is absolutely awful!!! Tastes just like the red antibiotic medicine I used to have as a child.... I made a smoothie with half a pineapple, half a cucumber, 1 stick celery and a big chunk of raw ginger - but guess the only thing I could taste...... the fake berry taste of the one scoop of this powder! Very strong too. If I buy again I will be choosing the unflavoured version.