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Nearly one in three older adults are chronically dehydrated, with consequences far more serious than just feeling thirsty. Our bodies, which are 60-65% water, rely on proper hydration for everything from joint cushioning and temperature regulation to nutrient transport and brain function.• Age-related changes make dehydration more likely: decreased thirst sensitivity, less water in the body, less efficient kidneys, and medication effects• Watch for signs of dehydration: dry mouth, dark urine, fatigue, dizziness, confusion, muscle cramps, constipation • Aim for 6-8 cups (1.5-2 liters) of fluids daily, adjusted for individual needs based on size, health, medications, climate and activity• Seek medical help for per ...