Oats, water, even sneakers may be advertised as “gluten-free.”

Because older people are so often excluded from medical studies, little is known about how best to treat them. Geriatricians often must rely on guesswork.

Bank shares tumbled and led Wall Street lower Friday as investors found something to groan about in first-quarter results from JPMorgan Chase, Citigroup and Wells Fargo.

Viruses shape the ecology of the planet, but scientists still have only a rudimentary understanding of the microbial impacts on animals, plants and ecosystems.

An aggressive typhoid strain, resistant to five types of antibiotics, is expected to replace other endemic strains worldwide. It could evolve to become untreatable.

President Trump considers himself a business-friendly leader, but his recent attacks some of America’s biggest companies and tariffs on steel and aluminum and Chinese goods suggest otherwise. CNN Chief Business Correspondent Christine Romans reports.