During starvation, the non-protein RQ value is close to

The respiratory quotient (RQ) is the ratio in the steady state of the volume of CO2 produced to the volume of O2 consumed per unit of time. It should be distinguished from the respiratory exchange ratio (R), which is the ratio of CO2 to O2 at any given time whether or not equilibrium has been reached. R is affected by factors other than metabolism. RQ and R can be calculated for reactions outside the body, for individual organs and tissues, and for the whole body. The RQ of carbohydrate is 1.00, and that of fat is about 0.70. This is because H and O are present in carbohydrate in the same propoions as in water, whereas in the various fats, extra O2 is necessary for the formation of H2O. Determining the RQ of protein in the body is a complex process, but an average value of 0.82 has been calculated. Ref: guyton and hall textbook of medical physiology 12 edition page number:359,360,361