Nitric Oxide and Beets: Why Athletes Are Obsessed
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Nitric Oxide and Beets: Why Athletes Are Obsessed
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Nitric oxide has been called one of the most important molecules in human physiology. It regulates blood flow, oxygen delivery, and muscle efficiency — which is exactly why elite athletes and weekend warriors alike have made beetroot one of the most popular natural performance supplements in the world. Here's the science behind why beets and nitric oxide are inseparable — and why it matters beyond the gym.
The connection between beets and athletic performance isn't a trend built on marketing. It's grounded in a substantial body of research that has made beetroot one of the most studied ergogenic aids — natural performance enhancers — in sports nutrition. Understanding why starts with understanding what nitric oxide actually does.
What Is Nitric Oxide and What Does It Do?
Nitric oxide (NO) is a simple gas molecule — one nitrogen atom bonded to one oxygen atom — that functions as a signaling molecule in the body. Despite its simplicity, it plays a critical role in several physiological systems, particularly cardiovascular and muscular function.
Its discovery was significant enough that the scientists who identified nitric oxide's role as a cardiovascular signaling molecule were awarded the Nobel Prize in Physiology or Medicine in 1998.
What Nitric Oxide Does in the Body
Vasodilation: Nitric oxide signals the smooth muscle cells lining blood vessel walls to relax. When vessels relax, they widen — increasing blood flow and reducing resistance throughout the circulatory system. This is the primary mechanism behind both its cardiovascular and performance effects.
Oxygen delivery: Wider blood vessels carry more oxygenated blood to working muscles. During exercise, this means muscles receive more of the oxygen they need to sustain aerobic effort — reducing fatigue and extending performance capacity.
Muscle efficiency: Beyond simply delivering more oxygen, nitric oxide also improves how efficiently muscles use the oxygen they receive. Research suggests that higher nitric oxide availability reduces the oxygen cost of exercise — meaning the same muscular effort requires less oxygen consumption.
Mitochondrial function: Nitric oxide plays a role in regulating mitochondrial respiration — the process by which cells convert oxygen and fuel into usable energy. Higher nitric oxide availability supports more efficient cellular energy production during sustained effort.
Nitric oxide is not a stimulant. It doesn't produce the jittery, heart-racing sensation of caffeine. Its effects are physiological — improving the mechanics of oxygen delivery and muscle efficiency through vasodilation rather than stimulating the central nervous system.
How Beets Boost Nitric Oxide
The body produces nitric oxide through two primary pathways. The first is enzymatic — the amino acid L-arginine is converted to nitric oxide by an enzyme called nitric oxide synthase. The second — and the one that beets activate — is the dietary nitrate pathway.
Beetroot is one of the richest dietary sources of inorganic nitrates. When you consume beets, the process unfolds as follows:
Step 1 — Nitrate consumption: Dietary nitrates from beetroot are absorbed in the small intestine and enter the bloodstream.
Step 2 — Salivary concentration: The body concentrates nitrates in saliva at levels up to ten times higher than in the blood. Oral bacteria then reduce these nitrates to nitrites — a critical conversion step that happens in the mouth.
Step 3 — Nitrite to nitric oxide: Nitrites are swallowed, enter the stomach and bloodstream, and are converted to nitric oxide — particularly in low-oxygen environments like working muscles during exercise.
This pathway is distinct from the L-arginine pathway and operates independently. It's also more reliable under the physiological conditions of exercise — when muscles are working hard and oxygen availability is reduced, the nitrate-to-nitric oxide conversion actually accelerates, delivering more NO precisely when and where it's needed most.
The Performance Benefits Athletes Care About
The nitric oxide boost from beetroot translates into four specific performance effects that are consistently supported by research:
Improved Time to Exhaustion
Research has found that beetroot supplementation is associated with athletes sustaining effort longer before reaching exhaustion — particularly in endurance activities where aerobic capacity is the limiting factor.
Reduced Oxygen Cost of Exercise
One of the most compelling findings in beetroot research is that the same physical effort requires less oxygen consumption — meaning the body operates more efficiently at the same work rate.
Improved Power Output
Some research has found improvements in peak power output and mean power in high-intensity efforts — particularly in activities that involve repeated sprints or efforts near maximal capacity.
Faster Recovery Between Efforts
Improved oxygen delivery and muscle efficiency may contribute to faster recovery between hard efforts in interval or team sport contexts — though this is less studied than the endurance benefits.
It's worth being precise about what the research shows: these are associations seen in controlled studies, not guaranteed outcomes for every individual. Individual responses to beetroot supplementation vary based on diet, gut microbiome, fitness level, and baseline nitric oxide status. Athletes who already consume high-nitrate diets may see smaller additional effects.
Which Sports Benefit Most From Beetroot
Beetroot's performance effects are most clearly documented in sports and activities that rely heavily on aerobic capacity and sustained oxygen delivery to working muscles.
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Cycling
Among the most studied. Cycling research consistently shows improvements in time trial performance, power output at submaximal intensities, and oxygen efficiency. The sustained aerobic demand makes it highly responsive to nitric oxide-mediated improvements.
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Distance Running
Multiple studies have found improvements in running economy — the oxygen cost of running at a given pace — with beetroot supplementation. This translates to running faster at the same effort level, or sustaining a given pace for longer.
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Swimming
Emerging research suggests swimming performance — particularly in middle-distance events where aerobic and anaerobic systems both contribute — may benefit from beetroot supplementation, though the evidence base is smaller than for cycling and running.
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Team Sports
Sports like football, basketball, and rugby involve repeated high-intensity efforts with short recovery periods. Some research suggests beetroot may support performance in these contexts — particularly in repeated sprint ability and recovery between high-intensity bouts.
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Strength Training
The evidence for beetroot in pure strength sports is less clear than in endurance contexts. Some research shows modest improvements in power output and blood flow to working muscles, but the effects are generally smaller than those seen in aerobic sports.
Timing and Dosing for Performance
For athletes using beetroot specifically for performance benefits, timing and consistency both matter.
Beetroot Timing Guide
Acute Pre-Workout
2 to 3 hours before exercise — this is when nitric oxide levels peak after beetroot consumption and when performance effects are most pronounced.
Daily Supplementation
Any consistent time daily — morning with breakfast is easy to maintain. For cardiovascular and recovery benefits beyond acute performance, daily consistency matters more than precise timing.
Loading Period
Some research uses multi-day loading protocols before competition. Consistent intake in the days leading up to an event may produce more sustained nitric oxide elevation than a single pre-event dose.
Avoid Mouthwash
Antibacterial mouthwash kills the oral bacteria that convert nitrates to nitrites — the first step in the pathway. Avoid using it immediately before or after consuming beetroot.
Why This Matters Even If You're Not an Athlete
The athletic performance research on beetroot gets the most attention, but the underlying mechanism — improved nitric oxide availability and vasodilation — is relevant for everyone, not just competitive athletes.
Better blood flow and more efficient oxygen delivery support everyday energy levels, mental clarity, cardiovascular health, and the kind of low-grade physical vitality that makes daily life feel easier. You don't need to be training for a race to benefit from a circulatory system that works more efficiently.
For most people, the more meaningful benefit of daily beetroot supplementation isn't the 2% improvement in a time trial — it's the cumulative cardiovascular support, the healthy blood pressure maintenance, and the broader nutritional foundation that makes a daily beet supplement worthwhile regardless of athletic goals.
Happy Soul's Beet Gummies + Fruits & Vegetables are built for exactly this — an elevated beetroot concentration on top of an 80+ plant foundation, designed for daily use regardless of whether you're an athlete or simply someone who wants a more complete nutritional baseline.
For more on how beets support cardiovascular health beyond performance, read 5 science-backed benefits of beetroot for heart health and how beetroot supports healthy blood pressure naturally.
Beets. Nitric Oxide. 80+ Plants. Daily.
Elevated beetroot built on a foundation of 80+ fruits, vegetables, and functional plants — formulated for daily use, not just training days.
Shop Beet Gummies →Frequently Asked Questions
Why do beets increase nitric oxide?
Beets are one of the richest dietary sources of inorganic nitrates. When consumed, oral bacteria convert these nitrates to nitrites, which are then converted to nitric oxide in the body — particularly in low-oxygen environments like working muscles. This dietary nitrate pathway is distinct from and complementary to the body's enzymatic nitric oxide production from L-arginine.
How much do beets improve athletic performance?
Research findings vary, but studies consistently show modest but meaningful improvements in endurance performance — including reduced oxygen cost of exercise, improved time to exhaustion, and better sustained power output. The magnitude of effect depends on individual factors including baseline diet, fitness level, and the specific sport. Athletes who already consume high-nitrate diets may see smaller additional benefits.
When should I take beet supplements for performance?
For acute pre-workout performance benefits, beetroot is most effective when consumed 2 to 3 hours before exercise — this is when nitric oxide levels peak. For ongoing cardiovascular and recovery benefits, daily supplementation at any consistent time is more important than precise pre-workout timing.
Is nitric oxide from beets the same as nitric oxide supplements?
Not exactly. Many "nitric oxide supplements" on the market use L-arginine or L-citrulline — amino acids that support the enzymatic pathway of nitric oxide production. Beets work through the dietary nitrate pathway, which is a separate mechanism. Both can increase nitric oxide availability, but through different routes. The dietary nitrate pathway from beets is particularly effective during exercise when oxygen is limited.
Do beets help with muscle recovery?
Some research suggests that improved blood flow from beetroot supplementation may support faster clearance of metabolic waste products from muscles after exercise, contributing to recovery. The antioxidant activity of betalains in beets may also help manage the oxidative stress associated with intense training. The evidence for recovery benefits is less established than for endurance performance.
Can non-athletes benefit from beetroot's nitric oxide effects?
Yes. The vasodilation and improved circulation from nitric oxide are beneficial for cardiovascular health regardless of athletic status. Improved blood flow supports healthy blood pressure, better oxygen delivery to the brain and organs, and overall vascular health. The performance research gets the most attention, but daily beetroot supplementation has meaningful benefits for anyone who wants to support their cardiovascular system.
Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Happy Soul products are not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare professional before starting any new supplement, especially if you are pregnant, nursing, or taking medication.