Cardiovascular
01 Heart healthNitric oxide keeps your arteries relaxed and flexible. Higher nitrate intake is linked to lower cardiovascular risk.
Research
- Lundberg, Weitzberg & Gladwin (2008). The nitrate–nitrite–nitric oxide pathway in physiology and therapeutics. Nature Reviews Drug Discovery.
- Lundberg, Carlström & Weitzberg (2018). Metabolic effects of dietary nitrate in health and disease. Cell Metabolism.
- Blekkenhorst et al. (2017). Dietary nitrate and atherosclerotic vascular disease mortality in older women. Am J Clin Nutr.
- Nobel Prize in Physiology or Medicine 1998 — nitric oxide as a cardiovascular signalling molecule.
02 Lowering blood pressureDietary nitrate and NO precursors produce measurable, repeatable drops in blood pressure — in healthy and hypertensive adults alike.
Research
- Webb et al. (2008). Acute blood pressure lowering, vasoprotective and antiplatelet properties of dietary nitrate. Hypertension.
- Kapil et al. (2015). Dietary nitrate provides sustained blood pressure lowering in hypertensive patients. Hypertension.
- Siervo et al. (2013). Inorganic nitrate and beetroot juice reduce blood pressure: systematic review & meta-analysis. J Nutr.
- Dong et al. (2011). Oral L-arginine supplementation and blood pressure: meta-analysis. Am Heart J.
- Barkhidarian et al. (2021). L-arginine and blood pressure: dose-response meta-analysis. Adv Nutr.
03 Cholesterol & artery healthIn people with high cholesterol, dietary nitrate improves the function of the artery lining and calms the inflammation that builds plaque.
Research
- Velmurugan et al. (2016). Dietary nitrate improves vascular function in hypercholesterolaemia: RCT. Am J Clin Nutr.
- Ashor et al. (2015). Inorganic nitrate/beetroot and endothelial function: systematic review & meta-analysis. Eur J Nutr.
- Khambata et al. (2017). Anti-inflammatory actions of inorganic nitrate stabilise the atherosclerotic plaque. PNAS.
- Bondonno et al. (2012). Nitrate-rich spinach augments NO status and improves endothelial function. Free Radic Biol Med.
Brain & metabolic
04 Brain health & dementiaNitric oxide raises blood flow to the brain, and loss of NO is mechanistically tied to cognitive decline and Alzheimer's changes.
Research
- Presley et al. (2011). Acute effect of a high-nitrate diet on brain perfusion in older adults. Nitric Oxide.
- Wightman et al. (2015). Dietary nitrate modulates cerebral blood flow and cognitive performance. Physiol Behav.
- Austin & Katusic (2013). Endothelial nitric oxide deficiency promotes Alzheimer's disease pathology.
- Katusic & Austin (2023). Endothelial nitric oxide in preservation of cognitive health. Stroke.
05 Reducing inflammationRestoring NO through the nitrate pathway lowers vascular inflammatory markers and helps inflammation resolve.
Research
- Khambata et al. (2017). Anti-inflammatory actions of inorganic nitrate stabilise the atherosclerotic plaque. PNAS.
- Carlström et al. (2010). Dietary nitrate reverses features of metabolic syndrome in eNOS-deficient mice. PNAS.
- Lundberg, Carlström & Weitzberg (2018). Metabolic effects of dietary nitrate in health and disease. Cell Metabolism.
06 Energy & mitochondriaNO helps build new mitochondria and makes them more oxygen-efficient — so your cells produce more energy from less oxygen.
Research
- Larsen et al. (2011). Dietary inorganic nitrate improves mitochondrial efficiency in humans. Cell Metab.
- Nisoli et al. (2003). Mitochondrial biogenesis in mammals: the role of endogenous nitric oxide. Science.
- Nisoli et al. (2004). Mitochondrial biogenesis by NO yields functionally active mitochondria. PNAS.
- Bailey et al. (2009). Dietary nitrate reduces the O₂ cost of exercise. J Appl Physiol.
07 Type 2 diabetes & metabolismMixed evidenceNO metabolism is impaired in diabetes; dietary nitrate reliably raises NO markers, though effects on blood sugar in established diabetes are mixed.
Research
- Gilchrist et al. (2013). Dietary nitrate on BP, endothelial function and insulin sensitivity in type 2 diabetes. Free Radic Biol Med.
- Bahadoran et al. (2015). Beneficial effects of inorganic nitrate/nitrite in type 2 diabetes: review.
- Carlström et al. (2010). Dietary nitrate reverses features of metabolic syndrome (eNOS-deficient mice). PNAS.
Performance & vitality
08 Exercise performanceBeetroot-derived nitrate lowers the oxygen cost of exercise and can improve endurance and high-intensity tolerance.
Research
- Bailey et al. (2009). Dietary nitrate reduces the O₂ cost of low-intensity exercise and enhances high-intensity tolerance. J Appl Physiol.
- Jones (2014). Dietary nitrate and the physiological determinants of exercise performance: a critical review. Appl Physiol Nutr Metab.
- Jones (2013). Dietary nitrate supplementation and exercise performance. Sports Med.
09 Erectile dysfunctionErections depend on the NO/cGMP pathway. NO precursors L-citrulline and L-arginine help mild-to-moderate erectile dysfunction.
Research
- Cormio et al. (2011). Oral L-citrulline improves erection hardness in men with mild ED. Urology.
- Chen et al. (1999). High-dose L-arginine in organic ED: double-blind RCT. BJU Int.
- Barassi et al. (2022). Long-term high-dose L-arginine in vasculogenic ED: RCT. J Endocrinol Invest.
- Rhim et al. (2021). L-arginine and PDE5 inhibitors in ED: meta-analysis. Andrologia.
10 Hormonal & reproductive signallingComplex scienceNO is a key messenger in the brain's control of reproductive hormones. Its role in steroid production is nuanced — not a simple 'testosterone booster'.
Research
- Rettori et al. (1993). Nitric oxide regulates luteinising hormone-releasing hormone secretion.
- McCann et al. (1996). The role of nitric oxide in reproduction.
- Zhang et al. (2021). Roles of nitric oxide in the regulation of reproduction: a review. Front Endocrinol.
- Del Punta et al. (1996). Nitric oxide inhibits Leydig cell steroidogenesis. Endocrinology.
11 ImmunityImmune cells use nitric oxide as a frontline weapon against viruses, bacteria, fungi and parasites.
Research
- MacMicking, Xie & Nathan (1997). Nitric oxide and macrophage function. Annu Rev Immunol.
- Bogdan (2001). Nitric oxide and the immune response. Nat Immunol.
- Nathan & Hibbs (1991). Role of nitric oxide synthesis in macrophage antimicrobial activity.
- Uehara et al. (2015). Nitric oxide in immune responses against viruses. Inflamm Res.
Specialised areas
12 Herpes & antiviralEmerging · lab researchIn laboratory studies, nitric oxide can suppress herpes simplex virus replication as part of the body's antiviral response.
13 Bone healthMixed evidenceNO helps regulate bone remodelling — supporting bone-building cells and restraining bone loss — though human trial results are mixed.
Research
- Wimalawansa (2010). Nitric oxide and bone. Ann N Y Acad Sci.
- Wimalawansa (2007). Rationale for nitric oxide donor therapy in osteoporosis.
- Jin et al. (2021). Nitric oxide modulates bone anabolism via osteoblast metabolism. J Clin Invest.
- Liu, Meng & Wang (2022). Efficacy of nitrates for bone health: systematic review & meta-analysis. Front Endocrinol.
14 Raynaud's phenomenonTopical NO donors increase blood flow to the fingers and reduce the frequency and severity of Raynaud's attacks.
Research
- Chung et al. (2009). Nitroglycerin (MQX-503) improves the severity of Raynaud's phenomenon: RCT. Arthritis Rheum.
- Hummers et al. (2013). Topical nitroglycerine gel in Raynaud phenomenon: RCT. Ann Rheum Dis.
- Curtiss et al. (2018). Topical nitrates in Raynaud's: systematic review & meta-analysis. J Am Acad Dermatol.
- Qiu et al. (2018). Nitroglycerin ointment for Raynaud's: systematic review. Rheumatol Int.
15 MenopauseEmergingNO availability falls through menopause as oestrogen drops. The NO precursor L-citrulline shows early benefit for blood-vessel function and blood pressure.
Research
- Moreau et al. (2012). Endothelial function is impaired across the stages of the menopause transition. J Clin Endocrinol Metab.
- Nyberg et al. (2020). Decline in endothelial function across the menopause transition; oxidative stress. GeroScience.
- Wong et al. (2022). L-citrulline on endothelial function and blood pressure in postmenopausal women. Nutrients.