The study was about alpha-carotene but over 90% of the alpha-carotene consumed in the diet comes from carrots. The study also found effect in all groups - healthy, sick, old, obese, etc. So, it's fair to say that carrots protect everybody from everything
http://www.ncbi.nlm.nih.gov/pubmed/21098341
http://www.ncbi.nlm.nih.gov/pubmed/21098341