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The push to remove artificial colors from U.S. foods is gaining speed, but making the change won't be easy -- or quick.

Last week, U.S. health officials directed food companies to voluntarily phase out petroleum-based synthetic dyes by the end of 2026.

U.S. Healt...

A genetically engineered tomato could one day rival salmon as a dietary source of vitamin D, if early research pans out.

British scientists used gene "editing" to produce the tomato, which is chock full of provitamin D3, a precursor that the body can convert into vitamin D.

The gene twe...