Obesity is tied to many health issues, and new evidence suggests that obese patients may face another health risk when taking a common blood thinner.

Iron deficiency has been associated with autism in past studies, such as one published in Pediatrics in 2012. And children of mothers who have too little iron during pregnancy may also have a higher risk of getting this condition.

Bariatric surgery brings the benefit of extraordinary weight loss, but it also carries some health hazards. One risk is blood clots, which may be avoided through various methods, some more effective than others.

The practice of blood-letting or bleeding patients was abandoned in the 19th  century when it became clear there was little benefit. New research suggests the barbaric-sounding practice could offer a very real heart benefit.