Our air is full of water and any good yoga expert can gain 10# by simply breathing properly to get the water from the air source only, this has been experimented with for over 100 years in medical labs with the ones who really know yoga.
Dr. Christopher had a little girl patient who damaged her throat so she could not drink/eat anything for years. He had her bath 3-5 daily for her water and then 3x daily her parents rubbed her body in Olive Oil and he said years later she was the most perfect health that he had ever seen a young lady could be. She was forced to be a Breathian and showed the body was quite capable of not being poisoned daily with what we have been raised to believe is food.
The skin takes in what it comes in contact with and also fights everything bad it comes in contact with. If someone applies anything to their skin; they are eating it. Make-up and sun screen are the worse 2 things a person can use.