I met Wiley Brooks back in the early eighties when he was on a lecture tour claming to be breatharian. He turned out to be a fraud. Jasmuheen is the latest to claim being a breatharian. I heard she is also a fraud plus one of her followers died from not eating.
Breatharianism, fruitarianism, raw food, may look good in theory, but I have not seen anyone maintain health long term. If one can obtain energy direct from source, then one might be able to eat less, but those who have reached this state are more legend than fact. The step by step approach toward this state is found in the meditations of Taoist alchemy. See healingtaousa.com
Do not risk your health by simply eating lighter or less. Eat cooked food according to your body type. Monitor your health yearly by pulse and tongue analysis of ayurveda or chinese medicine. Eat healthy food, meditate, and enjoy life.