Only consuming water for 5 days doesn’t prove a single nutrient is non-essential. It only shows that all food and the nutrients it contains may not be necessary to maintain life for 5 days.

It provides evidence that human physiology is adaptable. Also perhaps it shows that some individuals may be able to harness these adaptations to help manage health conditions relating to metabolism.

Instead of judging such approaches, perhaps accepting individual choice & supporting individuals to find the best way to health for them in a safe and open way is more likely to improve the health of our society rather than unhelpful #dietwars