Robert F. Kennedy Jr. wants synthetic dyes out of the nation’s food supply, but not every brand is ready to let go.

Kraft Heinz will be completely free of artificial dyes starting in 2027, with 90% of its products already dye-free.

The adsorption isotherms of azo dyes on a newly synthesized titania-doped silica (TdS) aerogel compared to silica aerogels and activated charcoal (AC) are systematically investigated. Monolithic TdS ...