It goes without saying that a healthy dose of optimism can make just about any situation easier to weather, but now there's one more reason to look at the glass half-full. According to a new study, an optimistic attitude will boost your immune system. The study followed optimism and immune response among first-year law students, and tracked changes over a one-year period. Researchers found that as students became more optimistic, they showed higher immunity to foreign viruses and bacteria. And when the students weren't feeling so optimistic, their immunity dropped.
Not only will looking on the sunny side boost your mood, it's also been linked to a longer lifespans in women and increased heart health. So the next time you're feeling down, chin up! You'll be helping your health, your heart, and increasing your lifespan at the same time.