The National Academy of Medicine suggests an adequate intake of daily fluids of about 13 cups and 9 cups for healthy men and women, respectively, with 1 cup.
It is generally okay to take magnesium citrate for occasional constipation, and it typically works quickly. However, people should never use magnesium citrate.
Government guidance says that men and women shouldn't regularly drink more than 14 units a week. If you regularly drink this many units, it's better to spread.