Propylene Glycol Alginate (PGA)

Propylene glycol alginate is an emulsifier derived from kelp (hence the term “alginate”). Although it’s plant-based (and so many people would assume that it is safe to consume), PGA may act as a teratogen in pregnant women, which can cause birth defects. High doses cause liver failure, allergic reactions, and seizures in children.

Despite the side effects, the FDA has cleared this additive as “generally safe.” It’s found in most jellies, salad dressings, yogurts, and ice creams.