Human
In general, humans can survive for two to eight weeks without food, depending on stored body fat. Survival without water is usually limited to three or four days. About 36 million humans die every year from causes directly or indirectly related to starvation. Childhood malnutrition is also common and contributes to the global burden of disease. However global food distribution is not even, and obesity among some human populations has increased rapidly, leading to health complications and increased mortality in some developed, and a few developing countries. Worldwide over one billion people are obese, while in the United States 35% of people are obese, leading to this being described as an "obesity epidemic." Obesity is caused by consuming more calories than are expended, so excessive weight gain is usually caused by an energy-dense diet.
Inedia
Hira Ratan Manek (born 12 September 1937) claims that since 18 June 1995 he has lived on water and occasionally tea, coffee, and buttermilk. Manek states that Sungazing is the key to his health citing yogis, ancient Egyptians, Aztecs, Mayans and Native Americans as practitioners of the art. While he and his proponents state that medical experts have confirmed his ability to draw sustenance by gazing at the sun, he was caught on camera eating a big meal in a San Francisco restaurant in the 2011 documentary "Eat the Sun".