Health and Wellness: All the Signs That You’re Not Drinking Enough Water (youtube.com)
By depriving ourselves of the world’s most natural resource, we are
continuously damaging our bodies. If you recognise any of the following
signs in yourself, we recommend you go and drink a glass of H2O straight
away.

The amount of water our bodies retain naturally decreases as we age.
Obviously, what this means is that, as we get older, we should
consciously increase our water intake. While premature ageing is more
evident on the outside, the damage it does to our insides will
ultimately be felt over time.

See also: Health Benefits of Green Tea