A recent viral post in a Taiwanese Facebook group sparked heated debate. A woman shared her experience after chewing caramel-coated sunflower seeds from a well-known brand. She spat the chewed seeds onto tissue paper, and two to three hours later, the residue turned green. This unusual transformation raised concerns about food safety and quickly went viral.
Netizens’ Reactions
-
Humorous takes: Some compared it to a diaper, bird droppings, or even joked they almost lost their lunch.
-
Skeptical voices: Others questioned why anyone would leave used tissue for hours, or spit out chewed seeds in the first place.
-
Scientific explanations: Several users suggested it could be due to reactions with the tissue’s fluorescent agents, while others noted that sunflower seeds naturally contain chlorogenic acid, which turns green when oxidized.
-
Food safety concerns: Some consumers expressed distrust, linking it to worries about product origins and possible additives.
Scientific Reasons for Seeds Turning Green
-
Chlorogenic Acid Oxidation: Sunflower seeds contain chlorogenic acid, which oxidizes and turns green after exposure to air.
-
Maillard Reaction: During roasting, proteins and sugars react, and certain amino acids may produce bluish-green pigments.
-
Metal Ion Reactions: Contact with iron or copper during processing or storage may lead to greenish discoloration.
-
Tissue Fluorescent Agents: The reaction may be amplified by chemicals present in tissue paper.
Safety Assessment
-
Generally safe: If only discoloration occurs without mold, musty smell, or bitterness, it is likely a harmless natural reaction.
-
Potentially unsafe: If accompanied by visible mold, sour odor, or clumping due to moisture, discard immediately to avoid aflatoxin exposure.
Conclusion
While the viral incident looks alarming, the green color in sunflower seeds is usually a result of natural chemical reactions rather than artificial additives. However, storage conditions, production quality, and source reliability remain key factors in ensuring food safety.