Here’s an interesting article – apples may be good for blood vessels, which can helps erections…Try juicing 5-6 apples and see what happens.

Biosci Biotechnol Biochem. 2009 Oct;73(10):2246-51. Epub 2009 Oct 7.

Apple procyanidins induced vascular relaxation in isolated rat aorta through NO/cGMP pathway in combination with hyperpolarization by multiple K+ channel activations.

Matsui T, et al.

Apple (Malus pumila) procyanidins led to a potent vasorelaxation effect in 1.0 microM phenylephrine contractive rat thoracic aorta. Relaxation was greatly reduced by 70 mM KCl as well as by removal of the endothelium, suggesting that it was associated with endothelium-dependent hyperpolarization. Neither cAMP synthesis inhibition nor NAD(P)H oxidase inhibition abolished the effect. In contrast,  complete abolition by a soluble guanylyl cyclase inhibitor revealed that apple procyanidins were mainly involved in the cGMP production pathways. In the presence of N(G)-monoethyl-L-arginine or tetraethylammonium chloride, the effect was still observed at higher concentrations (t;25 microg/ml), while their combination completely diminished the effect. Vasorelaxation was to some extent affected by paxillin, apamin and glybenclamide, and was greatly affected by 4-aminopyridine and by BaCl(2). These results indicate that procyanidin-induced vasorelaxation is associated with NO-cGMP pathway in combination with hyperpolarization due to multiple activation of Ca(2+)-dependent and -independent K(+) channels