Upfront

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How much more overall systemic stress straight men experience than gay men or bisexual men, according to a study in Psychosomatic Medicine that measured 87 participants' allostatic load, a physiological marker of stress. The researchers suggest this may be because sexual minority men have developed better coping mechanisms.

22

The number of U.S. veterans who commit suicide every day, according to a study by the U.S. Department of Veterans Affairs. The number is about 20 percent higher than the VA's 2007 estimate, although veterans constitute a shrinking percentage of the country's overall suicide rate, which the study says has risen nearly 11 percent between 2007 and 2010.

4

How many times more likely very obese girls are to be diagnosed with multiple sclerosis than girls of normal weight, suggests a study in Neurology.

36 percent

The reduced risk of dementia among older adults who are physically fit in midlife, according to a cohort study of more than 19,000 U.S. adults in the Annals of Internal Medicine that compared participants who performed in the top 20 percent of a treadmill test with those in the bottom 20 percent.