Food dye research: the sources behind our coverage

Why this page exists

Our other food dye pages make specific claims about the FDA's phase-out, about behavior research, and about where dyes show up in the food supply. This page is where those claims come from — the regulatory orders, the review papers, and the advocacy reports we drew on, organized so you can read the primary source instead of taking our summary of it. It isn't a shopping list, and it isn't a restatement of the hub page or the evidence explainer — read those first if you want the analysis; come here for the sourcing underneath it.

The regulatory record

Two FDA actions define what's actually required, and they are not the same kind of action:

• FD&C Red No. 3 color additive revocation — the FDA's own page for the January 2025 order revoking Red 3's authorization in food and ingested drugs, with the compliance deadlines (January 15, 2027 for food and beverages; January 18, 2028 for ingested drugs).
• HHS and FDA to phase out petroleum-based synthetic dyes — the April 2025 announcement covering Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2 and Green 3. This is a request to industry, not a rule; the page itself does not set a binding compliance date.

The behavior and hyperactivity research

This is the most contested part of the food dye conversation, and it's worth reading more than one source rather than taking any single study as the final word.

• Health Effects Assessment: Potential Neurobehavioral Effects of Synthetic Food Dyes in Children (OEHHA, 2021) — California's environmental health agency reviewed the toxicology, epidemiology and clinical literature on seven FDA-regulated dyes and concluded that synthetic food dyes can affect neurobehavior in some children, while noting that children vary in their sensitivity. This is the most comprehensive government review of the behavior question to date and the source most often cited by both regulators and advocacy groups.
• Artificial Food Dyes and ADHD (CHADD) — a plain-language summary from the leading U.S. ADHD advocacy organization. CHADD's position is individualized rather than a blanket warning: some children and adults appear to have a sensitivity to artificial colors, and a family that notices a pattern has reason to test an elimination, but the FDA's position that most children show no effect is not disputed.
• Food Dyes: A Rainbow of Risks (Center for Science in the Public Interest) — CSPI's report reviewing the toxicology data behind nine synthetic dyes still in use. Read this one with its origin in mind: CSPI is an advocacy organization that has petitioned the FDA to ban these dyes, so its framing argues a position. The underlying studies it cites are worth checking against OEHHA's independent review above.

A note on gut health

Emerging research has also looked at how synthetic dyes interact with gut bacteria, separate from the neurobehavioral question. This strand of research is newer and less settled than the behavior literature — worth watching rather than treating as established. If you want to read the primary research, search PubMed for "food colorants gut microbiome colitis" for the current peer-reviewed literature rather than relying on any single older study, since this is an active area where newer papers regularly supersede earlier ones.

How dyes are marketed to children

Several of our pages note that dyes show up disproportionately in products marketed to kids. For the underlying reporting:

• 8 ways to avoid giving your kids food with artificial coloring and Surprise! Foods you'd never guess contain artificial food dye (Environmental Working Group) — practical, current guides to where dyes turn up in products aimed at children, including several categories parents don't expect.

What we didn't include

The FDA's position that most children show no adverse effects from synthetic dyes is real and worth stating alongside the sources above — it's part of the FDA's own phase-out announcement linked above, not a separate claim we're leaving out. We also did not carry forward any specific book, workbook, or paid guide from other food-dye content we reviewed while researching this page: SafeMama doesn't sell downloadable guides, and we don't link to one we haven't checked the same way we check a product pick against our criteria.