There is a lot of medical literature showing the benefits of beets and beetroot juice for blood vessels, because it contains nitrates that include levels of nitric oxide.

I have started eating beets but I don’t see any big difference; however, one article suggests consuming 6 beets a day – not easy unless you juice them – to get an effect (on blood pressure, in their case).

I don’t like beets but I am beginning to tolerate them, so maybe I can eat 6 beets and see what happens…

In any case, here is some more information. If beetroots increase nitric oxide levels, then you could eat a lot of them several hours prior to a sexual encounter – say, 3-4 hours – and let the nitrates go through your system (if you don’t get sick from all those beets).

Well, you decide – but beets seem to be a healthy way to increase nitric oxide levels, which should help erections. And don’t use mouthwash or brush your teeth (which destroys the bacteria that convert nitrate into nitrite, so it can become nitric oxide and dilate blood vessels). And get lots of sunshine. And don’t talk with your mouth full…and…

Here’s some information from the journal Hypertension (Link here)

Acute Blood Pressure Lowering, Vasoprotective, and Antiplatelet Properties of Dietary Nitrate via Bioconversion to Nitrite

Abstract

Diets rich in fruits and vegetables reduce blood pressure (BP) and the risk of adverse cardiovascular events. However, the mechanisms of this effect have not been elucidated. Certain vegetables possess a high nitrate content, and we hypothesized that this might represent a source of vasoprotective nitric oxide via bioactivation. In healthy volunteers, approximately 3 hours after ingestion of a dietary nitrate load (beetroot juice 500 mL), BP was substantially reduced (Δmax −10.4/8 mm Hg); an effect that correlated with peak increases in plasma nitrite concentration. The dietary nitrate load also prevented endothelial dysfunction induced by an acute ischemic insult in the human forearm and significantly attenuated ex vivo platelet aggregation in response to collagen and ADP. Interruption of the enterosalivary conversion of nitrate to nitrite (facilitated by bacterial anaerobes situated on the surface of the tongue) prevented the rise in plasma nitrite, blocked the decrease in BP, and abolished the inhibitory effects on platelet aggregation, confirming that these vasoprotective effects were attributable to the activity of nitrite converted from the ingested nitrate. These findings suggest that dietary nitrate underlies the beneficial effects of a vegetable-rich diet and highlights the potential of a “natural” low cost approach for the treatment of cardiovascular disease.