Tips to Improve Your Body’s Immune System

Laugh Out Loud
While painful emotions like anger and grief can impair health, laughter does the opposite. A real belly laugh increases infection-fighting antibodies and boosts natural killer-cell activity, says Berk, who has shown students funny videos and measured their immune systems' response. "Even anticipating a humorous encounter can enhance immunity," he says. Laughter also increases circulation, stimulates digestion, lowers blood pressure and reduces muscle tension.