Energy storage and reuse in biological systems: Case studies

The consequences of energy storage in the body as fat and then reusing it metabolism are assessed for seven cases by referring to entropy generation criterion assessment: Case 1: Glycogen lipids stored a person dieting reused. 2: Glucose is converted into reconverted glucose spontaneously. 3: 2400 kcal high-fat diet induced fatty liver disease low-fat consumed recover. 4: Intermittent fasting skipping meal up 30 days/year. 5: Salmon store its reuse later during journey back spawning place. 6: Entropic assessment female arctic squirrels hibernation done. 7: Mean exergy cost active field homeothermic/endothermic birds mammals compared. Assessments show that generated negligible aging humans, intermittent caloric restriction via days year may extend life span approximately 3%. Migrant or hibernating animals with absolutely different purposes than humans generate most their entropy.