2KO

With vitamin D! Worry about being sidelined with a cold or the flu during this busy time of year? Supplementing with 600 IU to 2,000 IU of vitamin D-3 (the most absorbable form) daily will cut your risk of falling ill in half, suggests new research in the

And look on the sunny side! Surprising, but true: Expecting a bad outcome (for instance, that you’ll be late to a party or won’t meet a work deadline) increases your susceptibility to cold and flu viruses! Luckily, the opposite is true: Expecting a good outcome helps fend off those infections by prompting your body to release more virus-killing T- cells, reports the journal Psychological Science.