More creatine win. An interesting study that finds creatine has numerous benefits to vascular/microvascular endothelial function:

Effects of dietary creatine supplementation on systemic microvascular density and reactivity in healthy young adults

"The main findings of this study are as follows: i) oral supplementation with creatine monohydrate in healthy, moderately physically active young adults improves systemic endothelial-dependent microvascular reactivity; ii) the supplementation also increased skin capillary density and recruitment, which are dependent on microvascular endothelial function; and iii) blood pressure was also reduced after the supplementation.'

Full paper:

http://nutritionj.biomedcentral.com/...75-2891-13-115