When caloric intake is reduced as much as 50%, the effects have been shown to be: Longer lifespan. Lower incidence of cancer. Slower onset of age-related dementia. No ovulation (reduced reproductive capacity). The lack of ovulation is typical when diet is restricted (as in anorexic women). Although the positive effects of caloric restriction are negligible [...]

Natural selection has favored people who like fatty foods. This is because fatty foods contain lipids, which have the most calories per liter. Therefore, the person who eats the most lipids is the least likely to starve. Evolution has shaped our food preferences. There are 3 important macromolecules: Lipids Lipids stor energy in their C-C [...]