Nitric Oxide Ultra Caps by Pure Encapsulations

If you want better exercise performance or warmer hands and feet from improved circulation, a nitric oxide supplement fits. L-citrulline is useful when your workouts feel flat, your recovery runs feel “tight,” or erectile firmness isn’t consistent. It’s also a match if your home blood pressure readings run on the higher side and you’re working on lifestyle first. For those already eating a produce-rich, polyphenol-heavy diet, expect a smaller lift.

L-citrulline turns into L-arginine in your kidneys, which your blood vessels use to make nitric oxide (the gas that tells arteries to relax). It raises L-arginine more reliably than taking arginine itself, so you get steadier vasodilation. CranLoad, a blend of cranberry and grape seed polyphenols, nudges endothelial nitric oxide synthase (the vessel enzyme that makes nitric oxide) and has been shown to improve flow-mediated dilation (artery widening after a brief squeeze). Ascorbyl palmitate, a fat-soluble vitamin C, helps protect nitric oxide from being broken down by oxidative stress.

Take 2–4 capsules daily between meals, as directed. For training or intimacy, a single dose 60–90 minutes beforehand is practical; otherwise split morning and afternoon for steady circulation. The total L-citrulline here aligns with doses used for blood-flow support. For gym-specific performance, studies often use higher pre-workout citrulline malate, so don’t expect the same acute pump from a daily-use dose. Stay well hydrated.

Be cautious if you use prescription nitrates (nitroglycerin, isosorbide) or erectile medicines like sildenafil or tadalafil; combining can drop blood pressure too far. Talk to your clinician if you’re on antihypertensives. Cranberry and grape seed have mild antiplatelet effects, so use caution with warfarin or antiplatelet drugs. Prone to migraines or flushing? Start low; vasodilation can trigger headaches. If you get recurrent cold sores, monitor—raising arginine availability can be a trigger for some.