Yuk, it's poison. Sorry can't make suggestion other than just don't do it!
One glass of freshly squeezed real grapefruit off the tree would be way more satisfying and nutritious than 3 bottles of this stuff.
To my way of thinking there's no such thing as mostly primal, it's either primal or it's not - and diet drinks (including sprite) are not. Why would you sabotage all your other good decisions by ingesting them?