Final answer:
In adults, complete starvation can lead to death within 8 to 12 weeks, depending on an individual's body fat percentage and overall health.
Step-by-step explanation:
In adults, complete starvation can lead to death within 8 to 12 weeks. However, the exact duration of fasting without food varies depending on factors such as an individual's body fat percentage and overall health. Once a person has lost about 30% of their normal body weight, starvation begins. If the loss reaches 40%, death becomes almost inevitable.