Dr. Ryan Guinness

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Dr. Guinness's Latest Work

PHOTO: In 2018, nearly 2.3 million cases of these STIs were diagnosed. — STOCK PHOTO/Getty Images

STI rates are on the rise: Here's what you need to know

PHOTO: Surgeons operate on a patient during a cosmetic surgery procedure in this undated stock photo. — STOCK PHOTO/Getty Images

As teens turn to cosmetic surgery, study outlines new age-appropriate guidelines

PHOTO: Approximately one in two American adults takes aspirin on a regular basis. — U. Baumgarten/Getty Images

An aspirin a day may not always keep the doctor away

PHOTO: A mother picks up a prescription for her daughter in an undated stock photo. — STOCK/Getty Images

1 in 12 kids taking multiple medications at risk for a major drug interaction: Study

PHOTO: A boy receives vaccine injection in this undated stock photo. — STOCK PHOTO/Getty Images

Antibiotic side effects in kids lead to nearly 70,000 emergency room visits each year

PHOTO: An EpiPen epinephrine auto-injector, a Mylan product, in Hendersonville, Texas, Oct. 10, 2013. — Mark Zaleski/AP, FILE

What to know about the EpiPen shortage and generic version

PHOTO: Your nose may be able to tell you surprising things about your health. — Getty Images

Smelling things that aren't there could be a sign of potential problems: Study

Life expectancy declining in high-income countries, especially in the US: Study

PHOTO: A house is pictured in this undated stock photo. — STOCK PHOTO/Getty Images

Kids living near forests have more 'diverse' diets, better nutrition: Study

PHOTO: A person is pictured in a hospital corridor being consoled by a nurse in this undated stock photo. — STOCK PHOTO/Getty Images

Suicide risk nearly double for traumatic brain injury sufferers: Study

PHOTO: A woman is pictured sleeping in this undated stock photo. — STOCK PHOTO/Getty Images

Sleep loss can make people more isolated and lonely: Study

PHOTO: A plaque marks the U.S. border on the Paso Del Norte Port of Entry bridge which connects the U.S. and Mexico on July 23, 2018 in El Paso, Texas. — Joe Raedle/Getty Images

Immigrants cost the health care system less than US-born Americans: Study

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