A large research trial using a _____ supplement was stopped early due to evidence of possible harm.
A)vitamin C
B)vitamin E
C)beta carotene
D)calcium
E)magnesium

Question

Quizplus · Accepted Answer

Multiple large-scale studies have shown that beta carotene supplements may increase the risk of lung cancer, especially in smokers or those exposed to asbestos. In one major trial, the Beta Carotene and Retinol Efficacy Trial (CARET), researchers had to halt the study early due to concerns over the increased risk of lung cancer in the group taking beta carotene supplements.

A Large Research Trial Using a _____ Supplement Was Stopped