- Watermelon. Watermelon contains citrulline, another precursor to nitric acid.
- Spinach and Other Leafy Greens.
- Coffee.
- Dark Chocolate.
- Salmon.
- Pistachios.
- Almonds, Walnuts, and Other Nuts.
- Oranges and Blueberries.
What drinks help you get hard?
Love coffee or tea? Great! A 2005 review showed that caffeine may improve blood flow and relax the muscles that help you get and keep an erection. Try to keep it to black coffee, unsweetened tea, and caffeinated drinks without sweeteners.