Albany, Ga. ? It’s every chocolate lover’s wish that their favorite indulgence could somehow be healthy for them. Now, chocolate makers claim they have granted that wish.

Mars Inc., maker of Milky Way, Snickers and M&M’s candies, next month plans to launch nationwide a new line of products made with a dark chocolate the company claims has health benefits.

Called CocoaVia, the products are made with a kind of dark chocolate high in flavanols, an antioxidant found in cocoa beans that is thought to have a blood-thinning effect similar to aspirin and may even lower blood pressure. The snacks also are enriched with vitamins and injected with cholesterol-lowering plant sterols from soy.

But researchers are skeptical about using chocolate for its medicinal purposes and experts warn it’s no substitute for a healthy diet.

“To suggest that chocolate is a health food is risky,” said Bonnie Liebman, nutrition director for the Center for Science in the Public Interest.

Recent research has not established a link between flavanols and a reduced risk of cancer or heart disease, she said. And with obesity already a serious health problem, “the last thing we need is for Americans to think they can eat more chocolate.”

A paper published by the American Heart Assn. concluded that chocolate contains chemicals, including flavanols, that have the potential to reduce heart disease. But it added researchers still don’t know enough about flavanols to make dietary recommendations.

Other major chocolate companies also have started promoting the flavanol content of their dark chocolates, such as Hershey’s Extra Dark, introduced last fall with highlights on its label touting its 60 percent cocoa content and high level of flavanol.

Dark chocolate, which contains more flavanols than regular chocolate, is the fastest growing segment of the $10 billion-a-year chocolate market. Hershey reports that its dark-chocolate sales have grown 11.2 percent over the past four years.

Kevin Tilley scrutinizes CocoaVia health bars moving down a production line at Mars Inc.'s Masterfoods plant in Albany, Ga., on Feb. 1, 2006. Mars introduced CocoaVia to appeal to health-conscious consumers who also enjoy fine chocolates. The company says CocoaVia contains higher levels of natural antioxidants known as flavanols than regular chocolate. Flavanols are thought to have a blood-thinning effect similar to aspirin and may even lower blood pressure. Hershey, the nation's leading confectioner, is also touting the health benefits of flavanols in some of its products.

Last year, Hershey Co. acquired San Francisco-based Scharffen Berger Chocolate Maker Inc., known for its dark chocolate with high cocoa content and baking products, and plans to add new dark-chocolate products.

Mars created a new division, Mars Nutrition for Health & Well-Being, to distribute CocoaVia. The company has sold the CocoaVia products online for a couple years. They are already available at retail stores in 34 states, selling for nearly $1 a bar.

“Chocolate … is the number one flavor ingredient in the world,” said Jimmy Cass, Mars’ vice president of marketing. “Heart health is the No. 1 concern of adults over the age of 40 in every civilized nation. Putting those two together is automatically a big idea.”

The industry, trying to appeal to baby boomers, has been focusing on products that may provide health benefits, including gourmet chocolates, organic chocolates and “functional” chocolates such as CocoaVia.

Rachael Brandeis, a national spokeswoman for the American Dietetic Assn. in Atlanta, said dark chocolate is a good source of flavanols, but so are other foods such as fruits, vegetables and whole grains.

“Dark chocolate can fit into a healthy diet,” she said. The fat in chocolate is a type that does not raise cholesterol levels, but it can add unwanted pounds if a person overindulges, she said.

“I would say if you enjoy the taste of dark chocolate, enjoy it,” she said. “But you always have to be conscious of how much you’re eating.”

The Wellness Letter, a health and fitness newsletter published by the University of California-Berkeley, evaluated CocoaVia and advised readers to enjoy the snacks on occasion for pleasure, but not as a health food.

“CocoaVia’s benefits are still unproven,” the newsletter said. “Eat it only if you like it and are willing to pay the premium price.”