You don't have to avoid grains on a low-carb diet. Low-carb grains are rich in fiber and nutrients that serve to improve health and encourage weight loss.
Complementary proteins is the concept of combining incomplete protein sources together in one meal to consume all essential amino acids—but is it necessary?
This diet trend has you alternate between high and low carb days depending on your exercise routine. An RD explains more about how it works and what you can expect.