Food companies are getting more creative with the products they're enhancing -- collagen-infused marshmallow, anyone? But can they really deliver on the health benefits they claim?

Care for a dose of probiotics in your salsa? Or some omega-3 fatty acid -- derived from Peruvian sardines -- with your orange juice?  In recent years there's been a boom in the number of foods enhanced to have health benefits, and consumers' appetite for the trend has been large.
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