A food dye phase-out sounds simple until a plant actually tries to execute it. Color is one of the first things a consumer notices, and one of the hardest things to replicate once a synthetic dye leaves the formula.
For manufacturers working against FDA deadlines, state legislation, and retailer pledges at the same time, the real risk isn't a missed date on a calendar. It's discovering during scale-up that the natural colorant doesn't behave like the one it replaced.
The FDA formally revoked authorization for Red No. 3, giving manufacturers until January 15, 2027 to remove it from their formulations. Six other colorants — Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2, and Green 3 — fall under a separate, voluntary industry phase-out targeting the end of 2027. That distinction matters for how a company prioritizes its work:
• Red No. 3 carries a formal, legally binding deadline
• The other six dyes are a voluntary phase-out negotiated with the FDA, not yet mandated by federal law
• State legislation in California and West Virginia, along with retailer pledges, is pulling some of these timelines forward, in some cases to the end of this year
Jen Smith argues the smart move is to treat the entire color story as one project rather than a string of separate deadlines: identify every affected product now, evaluate alternatives, and start the stability and performance testing before any single date forces the issue.
Smith recommends mapping the entire product portfolio against three factors before starting any reformulation work:
• Regulatory and customer exposure — how urgent is this product?
• Technical difficulty — how hard will this be to reformulate?
• Business impact — how much does this product matter to the portfolio?
Easy products can move fast and build early confidence. The products that are both technically difficult and high-risk need to start early, because a company that waits to find out a reformulation isn't working has already run out of runway to fix it.
Brita Levengood, who has spent two decades in plant floor quality and food safety, points out that synthetic dyes are forgiving in ways natural colorants simply aren't. A natural colorant reacts to the process itself, not just the recipe:
• Blender shear and thermal exposure can degrade color before the product ever reaches its package
• Bulk density and powder flowability through hoppers change, sometimes requiring precise particle size milling to prevent streaking and clumping
• pH sensitivity means a natural red can shift toward blue or purple under conditions a synthetic dye would tolerate
• Higher hygroscopic properties draw in moisture, which can cause caking on the line and shorten shelf stability
“In reality, once you account for benchtop work, trial runs, cleaning validations, package redesign, and shelf life testing, your actual operational window for the plant floor is cut in half if you're lucky, and if you rush scale up, that's exactly where cross-contamination and batch failures happen.”
Levengood's most common mistake to watch for: treating the switch as a 1-to-1 ingredient swap and jumping straight from bench-top samples to full commercial runs. Cleaning validation is the other blind spot — natural extracts clean differently than synthetic dyes out of stainless steel equipment, and skipping that step risks cross-contamination between product runs.
Red flags that a formula isn't commercially ready include heavy dusting in the processing area, poor powder flow through feeders, color variation between supplier lots, and line operators manually adjusting weights every 20 minutes just to hold consistency.
Jen Smith points to a well-known case in the industry: a major cereal maker removed its synthetic dyes, watched consumers reject the duller color, and reversed course within a couple of years. Her takeaway is that reformulation is a product development project, not an ingredient swap — companies need to validate that consumers still want the product before the commercial transition, not after.
CPS's particle size expertise gives manufacturers a way to understand exactly how a natural colorant will behave in their specific product matrix before it ever reaches full-scale production. That knowledge helps de-risk scale-up and keeps a reformulation project on track against its deadline.
For companies managing this across a full product line, CPS works through the portfolio the same way Smith recommends internally: easier products move quickly, while the more complex or higher-risk ones get focused attention from CPS's engineers and scientists. Levengood adds one non-negotiable for any customer starting this work: bring R&D, operations, and quality together at the same table from day one, since the team that has to manufacture thousands of pounds consistently needs a seat next to the team that built the benchtop sample.
For CPS customers, that partnership translates into direct outcomes:
• Fewer surprises during scale-up, thanks to particle size characterization done up front
• Faster movement through straightforward reformulations, with dedicated technical attention on the complex ones
• Products that hold their color, texture, and shelf life after the switch to natural
• Cleaning and sanitation validation built into the reformulation plan, not addressed after a failure
Reach out to the CPS team to talk through where your product line stands on the shift to natural colorants.