A high-salt diet led to severe bacterial infections in mice and immune deficiencies in humans, at about 6 grams of salt (equivalent to 2 fast-food meals), through increased glucocorticoids.

A large study has found that taking a daily, low-dose aspirin does not significantly reduce the risk of dementia, Alzheimer's disease, or cognitive decline, compared to a placebo.

Higher daily step counts, but not step intensity, is linked to reduced all-cause mortality. Taking 8,000 steps was associated with a 51% reduced risk; 12,000 steps was linked to a 65% reduced risk.

Bedtimes that vary by more than 30 minutes per night led to an increase in resting heart rate (RHR); both lack of sleep and increased RHR are linked to increased risk of cardiovascular disease.