CNN Health

A lawyer in Cleveland, representing a couple that lost embryos in the Ohio fertility clinic storage tank failure last year, is asking an appeals court to answer when -- according to Ohio law -- life begins.

The science is clear: Staying hydrated and drinking enough water has health benefits.

Kale, that popular green of the health conscious, has joined the ignoble list of 12 fruits and vegetables with the most pesticide residues, according to the Environmental Working Group. The last time kale was on the list was in 2009 when it was ranked eighth. Strawberries and spinach took the top two spots again this year, respectively, followed by kale.

Legalization of marijuana, both for medical and recreational use, continues to spread across the globe even as the possible health risks (or benefits) are not fully known. Case in point, according to new research, people who use cannabis daily, as well as those who use high-potency weed, may be three times more likely to develop psychotic disorder than never-users.

San Francisco officials are proposing changes that could ban vape sales in the city and jeopardize the headquarters of leading e-cigarette company Juul Labs.

One in five Chinese children is overweight or obese, a new study has found, up from just 1 in 20 in 1995.

The U.S. Department of Health and Human Services on Monday detailed its new initiative to reduce new human immunodeficiency virus infections in the United States by at least 90% over 10 years.

England could face severe water shortages in the next 25 years because of climate change and rapid population growth, the head of the UK Environment Agency has warned.

One-third of uninsured Americans did not take their medicine as prescribed to try to lower their costs, a new government report found.

Have you ever found yourself staring at an empty bag of cookies you just devoured? Don't beat yourself up. Your brain is wired to eat that cookie -- and the next 10. It's as automatic a response as running away from a loud noise.

A Kentucky student is suing his local health department after it barred students who aren't immunized against the chickenpox from attending school and canceled extracurricular activities during an outbreak that has affected 32 people.

New numbers suggest that a purified fish oil derivative, a prescription drug called Vascepa, is more effective at preventing cardiovascular events than previously thought.

If you're a healthy older adult looking for ways to reduce your risk of heart attack and stroke, don't turn to that age-old standby: daily low-dose aspirin. It's no longer recommended as a preventative for older adults who don't have a high risk or existing heart disease, according to guidelines announced Sunday by the American College of Cardiology and the American Heart Association.

An Apple Watch may detect heart rate irregularities that subsequent medical tests confirm to be atrial fibrillation, according to preliminary findings from a new study. AFib is often undiagnosed since it might not cause noticeable symptoms, but it contributes to 130,000 deaths and 750,000 hospitalizations in the United States each year.

Teen vaping is on the rise, and schools are searching for solutions, with some taking disciplinary action or installing vape detectors in bathrooms.

Frequent consumption of sugary drinks such as sodas, sports drinks and juice is linked to an increased risk of premature death from cardiovascular disease and, to a lesser extent, from cancer, according to new research.

Giving a baby a new food to try is fun, and it should be. The only concerns parents should have: finding their phones fast enough to document the funny faces and cleaning up the mess that might follow. Yet in recent years, scientific evidence has accumulated quickly on what foods to introduce when and how to best prevent allergies -- leaving parents to keep track of it all.

Even in retirement, 90-year-old Akira Iritani still dreamed of resurrecting the prehistoric woolly mammoth.

Aid Access, a European organization that provides doctor-prescribed abortion pills by mail, is under scrutiny by the US Food and Drug Administration.