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Dr. Jonathan Chan

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PHOTO: This image provided by Bayer Healthcare Pharmaceuticals shows the birth control implant Essure.
Bayer Healthcare Pharmaceuticals/AP

Bayer to no longer sell permanent birth control implant Essure

PHOTO: A father holds his baby in an undated stock photo.
STOCK/Getty Images

Study finds new dads may suffer from depression almost as much as new moms

PHOTO: Amoxicillin antibiotic pill is seen in this undated stock photo.
STOCK PHOTO/Getty Images

Antibiotics are overprescribed: Here's why that's not good, and what you need to know

PHOTO: A woman is seen here breast feeding in this undated stock photo.
STOCK PHOTO/Getty Images

What to know about infant feeding guidelines, as the US opposes world breastfeeding resolution

PHOTO: A store worker affixes price tags to vitamins at a grocery storey on July 26, 2017, in Denver.
Denver Post via Getty Images

Use of so-called 'alternative' supplements doubled in teens between 2003 and 2014: Study

PHOTO: Vitamin D capsules appear in this undated stock photo.
STOCK PHOTO/Getty Images

Vitamin D: Good for bones, and possibly the colon

PHOTO: Runners just after the start of the Baikal Ice Marathon on Lake Baikal, the deepest lake in the world.

Is running more than 100 miles good for your heart?

PHOTO: A person holds an Adderall pill in Puerto Rico, July 5, 2017.
GDA via AP

Dramatic rise in ADHD medication mishaps among kids, report finds

PHOTO: A family watch television together in this undated stock photo.
STOCK PHOTO/Getty Images

Researchers suggest new movie rating to help give parents guidance on violent movies

PHOTO: A mosquito is seen close-up in this undated stock photo.
STOCK PHOTO/Getty Images

Diseases from mosquito, flea and tick bites have tripled, spread new disease: CDC