Beetroot Supplement — How It Works, Benefits and What to Buy

Beetroot has been studied more rigorously as a performance and cardiovascular supplement than most other vegetables — its mechanism is well-characterised, dose-response relationships are established, and multiple human RCTs confirm its effects. Understanding why beetroot works helps you choose the right form and dose.

The Nitrate-Nitric Oxide Pathway

Beetroot is one of the richest dietary sources of inorganic nitrate (NO₃⁻). After ingestion, nitrate is absorbed in the small intestine and concentrated in the salivary glands. Oral bacteria convert salivary nitrate to nitrite (NO₂⁻), which is swallowed and reduced to nitric oxide (NO) in the acidic environment of the stomach and in hypoxic (low-oxygen) tissues.

Nitric oxide is a potent vasodilator — it activates soluble guanylate cyclase in smooth muscle cells, increasing cGMP and causing vascular smooth muscle relaxation. The result is widened blood vessels, improved blood flow, and reduced blood pressure.

Jones et al. (2011, Acta Physiologica) and Lundberg et al. (2008, Nature Reviews) have comprehensively characterised this pathway. It's the same mechanism exploited by nitroglycerin in angina treatment — beetroot provides dietary nitrate that feeds the same pathway at physiological, food-based levels.

Forms of Beetroot Supplement

• Beetroot powder: Dried and ground beetroot, varying nitrate concentration. Most common form. Look for standardised nitrate content.
• Beetroot extract capsules: Concentrated extract, often 10:1 or higher. More compact and convenient than powder.
• Beetroot juice (concentrated shots): The form used in most clinical trials. 70 ml shots standardised to ~6–8 mmol nitrate are the research standard.
• Fermented beetroot: Some products use fermentation to enhance bioavailability — limited additional evidence for this over standard extracts.

What to Look For When Buying

Nitrate content standardisation is the key quality marker. Products that specify mg of dietary nitrate (or mmol) per serving are more reliable than those listing only "beetroot extract" in mg without nitrate quantification. The variance in nitrate content across beetroot products is enormous — from near-negligible to clinically relevant.

FAQ

How much beetroot supplement should I take per day?

Clinical trials have consistently used 6–8 mmol of dietary nitrate per day. In beetroot juice form, this is typically 300–500 ml. In concentrated extract form, look for products that specify nitrate content and target this range.

When should I take beetroot supplement?

For athletic performance: 2–3 hours before exercise, as nitrate peaks in plasma at 2–3 hours post-ingestion. For blood pressure management: consistent daily use at any time with a meal.

Is beetroot supplement safe for daily use?

Yes — beetroot is a food-derived supplement with an excellent safety profile. The main side effect is beeturia (pink/red discolouration of urine), which is harmless. Those on blood pressure medications should monitor BP when adding beetroot supplementation.