What happens to the body when a person fasts for 36 hours?

Neurosurgeon Dr Prashant Katakol said organs shift gears, the brain stays sharp, and the body burns fat when a person fasts for 36 hours. According to the neurosurgeon, when we fast, our body goes through a process called autophagy. It helps clear out toxins, causing an internal reset as cells begin recycling old components, inflammation decreases, and insulin sensitivity improves.