What percentage of your total calories per day should come from protein?The RDA for Protein is approximately 10-15% of total calories.
Definition of ahead. 1a : in a forward direction or position : forwardb : in front. 2 : in, into, or for the future plan ahead. 3 : in or toward a more advantageous position helped others to get ahead. 4 : at or to an earlier time : in advance make payments ahead.
Imagine your buddy is next to you and he is reading a book, or looking at something in his hands, or in some other way looking anywhere other than straight ahead. You see trouble coming and you say heads up! meaning hey, attention, look ahead! That is the literal meaning of giving someone a heads-up.