# Toothpaste packaging color mark misinformation > Developing situation record from CLSTR: https://clstr.news/situations/toothpaste-packaging-color-mark-misinformation > Updated: 2026-10-15T05:12:07.000Z. Sources: 4. Developments: 2. Social media misinformation has circulated claiming that colored rectangular marks on the bottom of toothpaste tubes indicate the safety or naturalness of their ingredients. These rumors suggest that specific colors, such as green, red, or black, signify different levels of chemical content or toxicity. Experts and industry professionals have clarified that these marks, referred to as ‘eye marks’, are purely technical components used in automated manufacturing. Optical sensors on packaging machinery scan these marks to identify the precise points for cutting, folding, or heat-sealing the plastic tubes. The color of the mark is selected solely to provide high contrast against the packaging to ensure machine accuracy and has no connection to the product’s chemical or medical composition. Health professionals advise consumers to rely on official ingredient lists rather than these marks to verify product contents. ## Timeline ### 2026-10-15: Toothpaste packaging marks do not indicate ingredient composition Colored squares on toothpaste tubes are industrial ‘eye marks’ used by packaging machinery, not indicators of natural or chemical ingredients as suggested by social media theories. 2 sources. https://clstr.news/cluster/toothpaste-packaging-marks-do-not-indicate-ingredient-composition ### 2026-09-27: Toothpaste color marks debunked as manufacturing technicalities Experts debunk social media myths claiming colored marks on toothpaste tubes indicate chemical levels, clarifying they are technical “eye marks” used for automated packaging processes. 2 sources. https://clstr.news/cluster/toothpaste-color-marks-debunked-as-manufacturing-technicalities --- Cite as: Toothpaste packaging color mark misinformation. CLSTR, https://clstr.news/situations/toothpaste-packaging-color-mark-misinformation