Common vitamin byproduct may help cancer evade immune system, study finds

A substance the body makes from vitamin A can make the immune system less effective at fighting cancer, a new study reveals.

Vitamin A itself is an essential nutrient, but one of its byproducts can accidentally "turn off" parts of the immune response against cancer, according to new research published in Nature Immunology.

Blocking that byproduct’s effects can restore immune activity and may improve cancer immunotherapy, the findings suggest.

FAST-GROWING CANCER COULD BE SLOWED BY COMMON BLOOD PRESSURE DRUG...