We're told to drink a lot of water to stay healthy. There are a few more reasons to stay well-hydrated, including fewer chronic health conditions and a better chance of living a longer life.

11,255 adults were questioned five times over the course of 25 years on factors such as soci economic status and family medical history

The volunteers were tested to see how much salt was in their blood and used as an indicator of their fluid intake. The more water we drink, the lower the level of salt in our body.

Natalia Dmitrieva is a researcher at the National Heart Lung and Blood Institute in Maryland.

There is a link between the amount of salt in the blood and the risk of heart failure. The normal range of sodium levels in a person's blood is between 125 and 146mEq/L. The elevated levels of up to 15 different markers of biological health and aging were found in the study.

A 10 to 15 percent increase in the odds of being biologically older than their chronological age was associated with those with higher levels of sodium. It was found that there was a 64 percent greater risk for developing chronic diseases.

According to the study authors, measuring levels of salt in the blood could be used to advise doctors. If you are in the danger zone, you can take steps to get more water into your system by drinking juices, vegetables, and fruits.

The goal is to ensure patients are taking in enough fluids while assessing factors that may lead to fluid loss.

Limits on fluid intake for heart failure may need to be deferred by doctors.

The method used by the researchers can't prove that hydration is the main factor in boosting health. We can see an association worth investigating further, though randomized, controlled trials are more suited for that.

The researchers were able to control for variables such as age, race, and biological sex, as well as exclude study participants with conditions such as diabetes or smoking that could affect their levels ofsodium.

The study concentrates more on the health risks of dehydration than on the benefits of being well hydrated.

Half of the world's population don't get enough to meet the recommended daily intake of 1.5 liters. There are a lot of reasons for that. Ensuring a clean drinking supply is priority number one for keeping everyone healthy.

It could make a difference to disease and mortality risk for those who have lots of options.

This can have a big impact on the global level. The results suggest that staying well hydrated may slow down the aging process and prevent or delay chronic disease if you stay well hydrated.

The research has appeared in a journal.