Looks like those 3 extra pieces of bacon you had for breakfast this morning were actually saving your life. OK, that might be pushing it, but we've got good news for you pork lovers out there. Researchers at ETH Zurich just uncovered that foods packed with niacin - Vitamin B3 - are linked to a longer life. A team of researchers fed a selection of roundworms a good dose of niacin and the introduction of this new element increased their lifespan by one-tenth longer, in comparison to their Vitamin B3-deficient worm friends.