I have access to kefir all the time.

Is taking a half cup of kefir better than let's say, a half cup of greek yogurt (which I have read has less sugar in it because they drain out the whey??) I read this online the other day. I thought whey was just protein, but from what they wrote "greek yogurt has less sugar than regular yogurt)

They were talking about regular plain (not fruit enhanced)

Thanks,
Melody