Just try sugar-coating this: The World Health Organization says your daily sugar intake should be just 5 percent of your total calories - half of what the agency previously recommended, according to new draft guidelines published Wednesday.

After a review of about 9,000 studies, WHO's expert panel says dropping sugar intake to that level will combat obesity and cavities. That includes sugars added to foods and those present in honey, syrups and fruit juices, but not those occurring naturally in fruits.

Dr. Francesco Branca, WHO's director for nutrition, conceded the new target was somewhat aspirational.

"We should aim for 5 percent if we can ... but 10 percent is more realistic," he said in a news conference on Wednesday.

WHO's new guidelines have been published online and the agency is inviting the public to comment via its website until the end of March.

Many doctors applauded the U.N. agency's attempt to limit the global sweet tooth.

"The less sugar you're eating, the better," said Dr. Robert Lustig, a professor of pediatrics at the University of California and author of a book about the dangers of sugar. "If the sugar threshold is lowered, I think breakfast cereal is going to have a really hard time justifying its existence," he said, referring to sweetened cereals often targeted to children.

When WHO last revised its sugar guidelines more than a decade ago, it recommended sugar should be less than 10 percent of daily calories. The U.S. sugar industry was so incensed it lobbied Congress to threaten to withdraw millions of dollars in funding to WHO. A contentious reference to the sugar limit was removed from a global diet strategy, but the recommendation passed.

Lustig said WHO's new guidelines could alter the food environment by forcing manufacturers to rethink how they're using sugar in processed foods like bread, soups, pasta sauces and even salad dressings. He called the amount of sugar in processed food an "absolute, unmitigated disaster."

WHO's expert group found high sugar consumption is strongly linked to obesity and tooth decay. It noted that heavy people have a higher risk of chronic diseases, responsible for more than 60 percent of global deaths. Dental care costs up to 10 percent of health budgets in Western countries and cause significant problems in the developing world.

WHO warned many of the sugars eaten today are hidden in processed foods, pointing out that one tablespoon of ketchup contains about one teaspoon of sugar and that for some people, including children, drinking a single can of sweetened soda would already exceed their daily sugar limit.

There is no universally agreed consensus on how much sugar is too much.