ure vegetarian diet is mush benefit to the health and longevity of the elders.Natural protein ofplant origin is good to health.The main rule of the prescription in this study is high protein

low car- bohydrate and lipid

and rich in vitamins and minerals Fish meal

milk powder and egg were used incontrol diet

sixty Weaning Wistar rats were divided into 2 groups(male and female 50% each)andfeed with the pure vegetarian diet and the control diet respectively. The animals were weighed every10 days for l year.There was no significant difference of body weight between the 2 groups.The av- erage life-span of male rats in the experimentalgroup was 577 days

which was 53 days less than thatof the controlgroup

In contrast

the female rats in the experimental group lived 77 days logner thanthose of the controlgroup

The rats were put to death by bloodletting by 2 years. There was no dif-ference of blood SOD activity

plasma LPO

serum cholostorol andf triglyceride between the 2 groups. Microscopic examination showed that no signlficant change had been found both in heart and liver

inflammation in the lungs of experimental rats was more ohvious than that in the control and thepathological changes in the kidneys and aorta were more notable in the cotnrolsthan that in the ex- perimernal rats the results suggested that the pure vegetarian diet dose have protective effects againstthe development of pathological changes in the aorta.