Red 40

Red 40 is rated avoid based on safety research. This ingredient has been flagged for potential health concerns, and consumers should carefully evaluate whether products containing it are appropriate for them. Consider looking for alternatives that use safer substitutes. Linked to hyperactivity in children. Banned or requires warning labels in EU. In GoodSupp's database, 17 products contain this ingredient. Consult your healthcare provider if you have specific concerns.

A synthetic red azo dye (Allura Red AC). As a colorant, it provides visual identification for the product. While it doesn't affect efficacy, some consumers prefer supplements without artificial colors. It appears in 17 products in the GoodSupp database.

Red 40 is synthetically produced, meaning it is manufactured through chemical processes rather than directly extracted from natural sources. Synthetic ingredients are extremely common in supplements and are not inherently less safe than natural alternatives. In many cases, synthetic production allows for higher purity and more consistent quality. The FDA regulates both natural and synthetic supplement ingredients under the same safety standards. GoodSupp rates ingredients based on their actual safety data regardless of whether they're natural or synthetic.