Hiking equipment
According to Tom Brown, the basic plan for survival is in the order of shelter (including clothing), water, fire, and food. Cody Lundin writes about the "Rule of 3s"; this relates to human survival without basics: three minutes without air, three hours without shelter, three days without water, or three weeks without food.
Khader Adnan
Almost two months into his hunger strike, it was reported that Adnan agreed to having electrolytes, vitamins, glucose, and salts added to the water he is drinking. His doctors noted that, "A fast in excess of 70 days does not permit survival. Infusion of liquids, adjustment of salts, and the addition of glucose and vitamin cannot prevent certain death due to such a protracted hunger strike."