hypocaloric

adjective

hy·​po·​ca·​lor·​ic -kə-ˈlȯr-ik, -ˈlōr-, -ˈlär-; -ˈkal-ə-rik 

: characterized by a low number of dietary calories

hypocaloric diets, usually 1,000–1,200 kcal/day

—Julie L. Sharpless