A sedentary adult needs about 2.5 L of water a day. This varies depending if the person is active or those living in hot and humid conditions.
Sources of water:
1. Foods - Fruits and vegetables contain a lot of water.
2. Liquids - an average individual normally consumes 1200ml of water. Exercise and thermal stress increase the need for fluid by five to six times this amount.
3. Metabolic water - the breakdown of macronutrient (fat, carbohydrates, and protein) molecules in energy metabolism forms water and carbon dioxide.
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