Jell-O contains the health promoting ingredient, gelatin, but can also contain sugar, artificial flavors or sweeteners, which can have negative health effects. Gelatin is high in collagen, a protein that strengthens the body’s connective tissues, improves digestive health and fortifies the skin and nails, according to HowStuffWorks.com.
The gelatin in Jell-O helps to protect joints, heal the mucosal lining of the digestive tract and improve gastric acid secretion needed for good digestive strength. Gelatin contains the amino acid glycine, which improves sleep, according to Chris Kresser.
A negative effect of consuming gelatin can be allergic reaction or digestive disturbances such as an upset stomach, burping and bloating, according to WebMD.