A new study published in the American Heart Association journal Arteriosclerosis, Thrombosis and Vascular Biology found that people with blood type A, B, or AB — 66% of the American population — had a higher risk for coronary heart disease compared to those with blood type O [1].

The Red Cross recently announced that its blood supply has reached emergency levels [1]. Donations are down more than 10% across the country, resulting in 50,000 fewer pints of blood than expected last month.

Question: I’ve heard that nitrates in food are dangerous and that I should avoid them. What are nitrates, why are they a problem, and what foods contain them?

We are all familiar with the negative consequences of getting too little sleep, but they may be more serious than just feeling a bit groggy. A new study published in the journal Science Translational Medicine has shown that sleep restriction, along with a disruption of one’s internal body clock, can raise the risk of obesity and type 2 diabetes [1]. This could explain the increased rates of these conditions in shift workers and others who work at night.

Infants and toddlers who have been treated for cancer tend to reach certain developmental milestones later than do their healthy peers, say researchers at the National Institutes of Health (NIH) and in Italy. The findings show that delays may occur early in the course of treatment and suggest that young children with cancer might benefit from such early interventions as physical or language therapy.