Mixing nitrate (from beetroot juice) with vitamin C might help keep blood vessels healthy in young people, but more research is needed because this study was small.

Assessment Explanation

The abstract uses 'could have protective effects' which is appropriate for a preliminary finding. However, the study is small (n=10) and the vascular outcomes showed no significant differences between groups, so the claim should be more cautious. 'May have' is better than 'could have' for probability language.