evidence: Many manufacturing industries also add it to their products, such as solvents, brake fluids, thinners, etc. About 97% of the seasoning and flavors we add to food and snacks contain propylene glycol. The food authorities, especially in the United States and European countries, have announced its safety for consumption in foods. [...] Different common foods contain propylene glycol, either in large or small quantities and many people are ignorant of this fact. Manufacturing industries use this propylene glycol to increase the lifespan of their processed foods. Propylene glycol can serve as food addictive or preservation. Foods that contain propylene glycol include the following: [...] Furthermore, we mustn’t forget to mention that the food grade one is formulated exclusively for human consumption, and it is frequently used as a humectant, solvent, or stabilizer in goods such as ice cream, cake mixes, and salad dressings. In contrast, industrial grade one is not intended for human consumption and is used in a variety of industrial applications, such as the manufacture of polymers, antifreeze, and coolants.