Beet Root and Nitric Oxide: The Second Pathway, and Why Dose and Mouth Bacteria Both Matter

Beet root got its reputation from endurance athletes, but its relevance to a male vitality product is the same mechanism: it's a nitric oxide source that works through a completely different route from L-arginine. That makes it a smart complement in theory. The practical questions are how much nitrate you're actually getting and whether your mouth bacteria are intact.

How the nitrate pathway works

Beets, along with spinach, arugula, and celery, are rich in inorganic nitrate. When you eat them, nitrate is absorbed, concentrated in saliva, and reduced to nitrite by bacteria on the tongue. Swallowed nitrite is then converted to nitric oxide in the stomach and tissues, especially where oxygen is low. This "nitrate-nitrite-NO pathway" is independent of the arginine-NOS pathway and becomes relatively more important when NOS function is impaired, as it is with age and cardiovascular disease.

Editorial That independence is why pairing beet root with arginine, as Spartamax does, is more thoughtful than doubling up on arginine. Two roads to the same destination. Our article on nitric oxide and blood flow explains the whole system.

The evidence

Blood pressure

Independent evidence A 2013 meta-analysis of 16 trials found inorganic nitrate and beetroot juice reduced systolic blood pressure by about 4.4 mmHg, with a dose-response relationship. Later trials in hypertensive patients found sustained reductions of 7–8 mmHg over 4 weeks of daily juice, an effect comparable to a low-dose medication.

Exercise performance

Independent evidence Dietary nitrate reduces the oxygen cost of exercise and improves time-to-exhaustion in recreational athletes, with effects clearest at 300–500 mg nitrate taken 2–3 hours before activity. The NIH Office of Dietary Supplements rates the evidence as reasonably consistent for recreationally active people and weaker for elite athletes.

Sexual function

Independent evidence Direct trials are essentially absent. The inference is mechanistic: the same NO/cGMP signaling drives both vasodilation in muscle and erections, and endothelial function improves with nitrate. Plausible, but not demonstrated.

Dose

Effective doses cluster around 300–500 mg of nitrate, which corresponds to roughly 250–500 ml of beetroot juice, one or two concentrated "shots," or 5–10 g of beetroot powder. Nitrate content varies widely with soil, variety, and processing; some beet powders on the market contain very little.

Editorial A Spartamax gummy can't contain 5 g of beet powder. Whatever beet root is present delivers a small nitrate dose, probably well under 100 mg. Unless the formula uses a nitrate-standardized concentrate (the vendor doesn't say), the beet root is more of a gesture toward the pathway than a functional dose. The supplement facts page covers this dose-vs-capacity problem across the formula.

The mouthwash problem

Because the pathway depends on oral bacteria, antibacterial mouthwash (chlorhexidine especially, but also some everyday brands) can abolish the blood-pressure effect of dietary nitrate. If you're taking any nitrate source, skip antiseptic mouthwash, or at least don't use it around the time you take it. Chewing a gummy, as it happens, gives nitrate good contact with the tongue.

Safety

• Beeturia: pink or red urine and stool in 10–15% of people. Harmless, but alarming if unexpected.
• Blood pressure: additive with antihypertensives and, importantly, with nitrate drugs (nitroglycerin) and PDE5 inhibitors. Discuss with a prescriber.
• Kidney stones: beets are high in oxalate; caution for people with a history of calcium oxalate stones.
• Nitrate and cancer: the old concern about nitrate and nitrosamines relates to cured meat, not vegetables; vegetable nitrate is not considered carcinogenic and is associated with cardiovascular benefit.

Related: L-arginine for men covers the other NO pathway, and grape seed extract covers the antioxidant piece meant to protect the NO both pathways produce.