UNDATED -- When it comes to cereal bars, it seems like manufacturers think breakfast treats are better with blueberries. But just because a food has blue coloring, doesn't mean it's a berry.

KTVU found cereal bars advertised blueberry on the box, but inside it contained flavored fruit pieces and fruit flavoring blueberry juice. Not a single blueberry.

Kia Conn said that when she shops for groceries she looks at calories of fat and whether or not something is organic. And when it comes to fake food, she leaves it on the shelf.

"I think it's misleading," Conn said. "I'd rather have the blueberries I just bought,"

Bruce German, a professor of food chemistry at UC Davis, said using a picture of blueberries is perfectly legal when advertising something blueberry flavored.

"The label tells you the absolute truth," German said.

KTVU found one label that listed the ingredients of blueberry flavored "crunchlets" as sugar and eight other ingredients. German said you have to look at more than the picture on the box.

"If you like the flavor of blueberries then this tells you there is that, but it doesn't tell you that there's blueberries in it," German said.

Some shoppers swear they'll never buy fake foods.

"I'm conscious of buying healthy food, and I don't buy a lot of packaged food," one shopper told KTVU. German said manufacturers use fakes for many reasons. They're cheaper and last longer on the shelf. That convenience and savings are important to many shoppers.

But German said buyers should beware when it comes to "blueberries."

"If someone really just wants low cost but would like textured blue chunks to emulate blueberries, they should be aware of the fact that they are what they are," German said.