High-dose oral vitamin C partially replenishes vitamin C levels in patients with Type 2 diabetes and low vitamin C levels but does not improve endothelial dysfunction or insulin resistance.
Hui Chen, R. Karne, Gail Hall, U. Campia, J. Panza, R. Cannon, Yaohui Wang, A. Katz, M. Levine, M. Quon
American Journal of Physiology. Heart and Circulatory Physiology