内容摘要：About 300 pigs of different ages live on this farm, nestled in rolling hills, its exact location undisclosed for security reasons. Tags on their ears identify their genetics.

About 300 pigs of different ages live on this farm, nestled in rolling hills, its exact location undisclosed for security reasons. Tags on their ears identify their genetics.

Fluoride tablets and lozenges are sometimes recommended for children and teens at increased risk of tooth decay or cavities because of low fluoride in their local drinking water. Companies also sell drops for babies.said the products pose a risk when swallowed because they may interfere with healthy gut bacteria that are critical to digestion, immunity and other key bodily functions. He also referenced studies showing possible associations between excess fluoride intake and other problems,

The nation’s leading dental group said Tuesday the studies “do not in fact demonstrate any harmful effects” from fluoride at the levels used by dentists.AP’s Lisa Dwyer reports on new plans to phase out the use of fluoride tablets.“Proposals like this stand to hurt rural America, not make them healthier,” American Dental Association President Dr. Brett Kessler said. “More than ever, at this critical time in American health care policy, it is vital that we slow down to properly study the full implications of actions like this on the health of the nation.”

— the first U.S. state to ban fluoride from drinking water — recently made fluoride supplements available without a prescription. As more state and local governments begin, the need for supplemental fluoride is expected to grow.

Fluoride strengthens teeth and reduces cavities by replacing minerals lost during normal wear and tear, according to the Centers for Disease Control and Prevention. In 1962, the agency set guidelines for how much should be added to water.

, a former environmental lawyer,“To see hope restored to her and her family is extraordinary,” said Dr. Jayme Locke, Looney’s original surgeon who secured Food and Drug Administration permission for the transplant.

More than 100,000 people are on the U.S. transplant list, most who need a kidney. Thousands die waiting and many more who need a transplant never qualify. Now, searching for an alternate supply, scientists are genetically altering pigs so their organs are more humanlike.Looney donated a kidney to her mother in 1999. Later pregnancy complications caused high blood pressure that damaged her remaining kidney, which eventually failed. It’s incredibly rare for living donors to develop kidney failure although those who do are given extra priority on the transplant list.

But Looney couldn’t get a match — she had developed antibodies abnormally primed to attack another human kidney. Tests showed she’d reject every kidney donors have offered.Then Looney heard about pig kidney research at t