Yes, when you put the brewers yeast in a live juice it becomes alive as MH says, so I think it contains a lot more enzymes (alive meaning not pasteurized or heated in any way) I think blending the whole fruit is better then using store bought juice.
I also didn't consume brewers yeast for a long time thinking it would make me have candida problem worse then I already did, but have learned it does not cause yeast infections wish is great since I no longer take vitamin tablets.
I guess you could leave it out but since it is a perishable MH said it would be better to refrigerate, and it taste so good cold.
you could use any concoction of fruit for your brewers yeast drink. I tried others and like the apple the best with the taste of brewers yeast.
Yes just 2 Tbs of yeast containes... 16g of protein .. 6g of fiber...80% Thiamine...90% riboflavin...50% niacin...10%iron ...40% B6
Also Inositol ..selenium..choline..chromium..potassium RNA/DNA paba .
And A lot of amino acids, IM not sure about all of them but 18 of them anyway.
So as you can see brewers yeast is a power house of nutrients.