Comparing E1520 - Propylene Glycol vs E1517 - Glyceryl diacetate

Is propylene glycol safe?

Yes—E1520 is authorized in the EU and considered GRAS by the FDA when used within limits; the ADI is 25 mg/kg body weight per day. Very high exposures (mainly from medicines), especially in infants or those with kidney/liver impairment, can cause adverse effects.

What is propylene glycol used for?

In foods it functions as a humectant and solvent/carrier for flavors, colors, and emulsifiers, helping retain moisture and distribute ingredients evenly. It’s commonly used in baked goods, icings, confectionery, and flavor extracts.

Does propylene glycol cause cancer?

No—propane-1,2-diol has not shown carcinogenic effects in studies and is not classified as a human carcinogen. Regulatory evaluations report no cancer concern at permitted food-use levels.

Is propylene glycol antifreeze?

Propylene glycol is used in “low-toxicity” antifreeze and cooling systems, whereas the more toxic antifreeze is typically ethylene glycol. Food-grade propylene glycol is the same chemical but produced to high purity and used at much lower amounts in foods.

Is propylene glycol bad for you?

For most people, typical amounts in foods are not harmful and are well below the ADI (25 mg/kg body weight/day). Some individuals may experience irritation or rare allergic reactions, and excessive exposure—mainly from pharmaceuticals—can be problematic.