The downturn in the economy has many people looking for ways to save money. But doctors warn there's one area where you shouldn't cut back and water down, and that's in baby formula.

It may seem like the easiest way to pinch pennies, just add more water than the directions say to your baby's formula to help make it last longer. But doctors say this can kill your child. It's called water intoxication.

Dr. Michael Smith says, "Trying to stretch out the cost of the formula by diluting it down with extra water. When that happens, the extra water gets into the baby's system as well and dilutes down natural salts within the baby. This can become life threatening or even fatal.”

Doctor Michael Smith from the Southside Medical Clinic in Eau Claire says formula in the United States is extremely safe as long as you follow manufacturer's recommendations.

Dr. Michael Smith says, "In doing so we are certain they are getting the appropriate amount of balance between nutrition, supplementation of vitamins, and essential other items in their diet, as well as an appropriate amount of liquid in the form of water."

New mom Kristin Molina says she expects to pay more than $150 a month on formula with her new baby, just as she did with her first child. But despite the high costs, she says that's one thing she could never skimp on.

Kristin Molina says, "They need their calories just like you do."

Smith says depending on the age of the baby, it's usually not a good idea to give your child bottles of water between meals.

Dr. Michael Smith says, "The best thing to do is follow the advice of your doctor as far as appropriately mixing the formula as well as discussion of whether or not your child needs any supplemental water based on their age compared to what they're taking in."

Despite expensive formula, Molina says parents should at all costs, avoid putting their babies in danger.

Kristin Molina says, "I wouldn't sacrifice your baby's health for money. It's not a place to cut your budget."

Doctor Smith says if you are financially pinched, talk about that with your physician either at an office visit or by calling. He says they can usually direct parents to assistance in the community or help them out directly.