The only over-the-counter, federally approved weight loss pill in the U.S. isn’t exactly flying off shelves, but it’s not because Americans are getting any slimmer.

GlaxoSmithKline said Wednesday that 4 million people have tried alli since the drug hit shelves a year ago. Alli is the only nonprescription weight loss pill approved by the Food and Drug Administration.

As a drug that should theoretically trigger huge sales, the preliminary figures are “pretty underwhelming,” said Steve Brozak, an analyst with WBB Securities.

A mother has defended feeding her 18-month-old daughter a diet of French fries - even though the child weighs as much as a four-year-old.

Angela Boswell, 33, from Manchester, England, insisted Courtney, who weighs 30 pounds, will grow up to be healthy.

The youngster occasionally extends her diet to take in chocolate, crisps, cereal and Coca-Cola - but steers clear of her greens.

The percentage of American children who are overweight or obese appears to have leveled off after a 25-year increase, according to new figures that seem to offer a glimmer of hope in an otherwise dismal battle.

“That is a first encouraging finding in what has been unremittingly bad news,” said Dr. David Ludwig, director of an obesity clinic at Children’s Hospital Boston. “But it’s too soon to know if this really means we’re beginning to make meaningful inroads into this epidemic. It may simply be a statistical fluke.”

The study, conducted by the Centers of Disease Control and Prevention, found that roughly 32 percent of children were overweight but not obese, 16 percent were obese and 11 percent were extremely obese.