In the ancient era, ancestors grew up in a world of stress and scarcity, where food is not available and fasting was common, where the body developed a defense mechanism to cope with that and store food and this life had a blue print of wellbeing and longevity.Fasting reduces oxidative stress, enhances cellular repair processes and appears to be a key strategy for anti-aging and longevity.However when food is in abundance, this results in elevated insulin levels, increased fat storage and increased oxidative stress and inflammatory conditions in the body. Insulin also enhances cellular division, which is a risk factor for cancer formation.