​Lack of necessary or proper food substances in the body

A) ​infirmity
B) ​malnutrition
C) ​NREM (non-rapid eye movement)
D) ​obesity
E) ​protein
F) ​purge
G) ​REM (rapid eye movement)
H) ​rickets
I) ​scurvy
J) ​sleep apnea
K) ​tactile
L) ​water

Malnutrition is the condition that occurs when the body does not get the right amount of vitamins, minerals, and other nutrients it needs to maintain healthy tissues and organ function, which includes the lack of necessary or proper food substances.