What is the adequate water intake for a 25 year-old man?

TBW as a Percentage of Body Weight, Mean (range)

59 (43–73)

Your need for water depends on many factors, including:

    - Age
    -Exercise
    -Body size
    -Sweat Level
    -Medical Condition
    -Use of medications
    -Environment (climate)

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.

What are the choices