What makes gum kosher?

You walk in the mall, you're in the mood of  something sweet. You see a gumball machine,   you think to yourself, "What could possibly be  wrong with gum? It looks so innocent and sweet." Gum is from the most complex kosher items there  are out there. That's because there are oils,   like tallow, which is animal-based, lard, which  is pig-based. They're both very much non-kosher,   if it's not schechted properly in the case of  tallow. When you break down these oils, these   tallow, or it comes from vegetable oil, which  is perfectly kosher, so when you break it down,   you get this glycerin and you get fatty acids,  oleic steric. And gumballs were actually once made   with rubber, but due to shortages in World War  II, they had to make synthetic rubbers, and those   plasticizers were made with very kosher-sensitive  steric and oleic acids. And then glycerin is used   to give that final polish. So, word to the  wise, make sure there's a hechsher on it. This gum actually does have a hechsher. Enjoy.