Can acetaldehyde and formaldehyde be found in places other than PET bottles?
Yes. Acetaldehyde and formaldehyde are naturally occurring substances that are found in foods at much higher levels than would be present in PET or in water packaged in PET bottles. Foods that contain acetaldehyde include many ripe fruits e.g., apples, grapes and citrus fruits at levels up to 230 ppm. It is produced during the fermentation of sugar to alcohol, and is a natural constituent of butter, olives, frozen vegetables and cheese. It forms in wine and other alcoholic beverages up 140 ppm after exposure to air. Acetaldehyde and formaldehyde are also formed in the body when certain foods are digested. For example, alcohol is converted to acetaldehyde in the body.
