How Long Can You Go Without Eating or Drinking Anything?

Not long

If you don't eat and drink, you can't last long -- four to seven days at most -- because of dehydration. A person who doesn't eat but intakes water can last for a month or longer. If a person eats but doesn't drink, he may be able to live indefinitely because of the water obtained from the food, itself.

Your personal health and stamina will determine your body's ability to deal with starvation. There are people who have trained themselves to go for days without food or drink.

The information I have suggests that the mental faculties of those individuals practicing abstinence decreases considerably after approximately ten days.

The Exception

There are patients in the hospitals who cannot eat nor drink but are able to survive with the tube injection of the nutricious liquids directly attached to the blood bessel.