Heart patients who don't get enough Vitamin C could be at a greater risk for cardiac complications -- and even death.
Korean researchers studying heart failure patients found those with the lowest Vitamin C intake were about 2 1/2 times more likely to have heart inflammation than those with the highest Vitamin C intake.
They were also almost twice as likely to die from heart disease within the year of follow up.
The lack of detail in that report seemed strange to me, but I was only able to find one other:
http://www.saga.co.uk/health/news/2011/vitamin-c-boosts-heart-health-179.aspx