The Rise of a Purple Power-Up
You may have seen it in health cafes or on the shelves of sports nutrition stores: concentrated beetroot juice shots and powders marketed to athletes. This isn't just a wellness fad; it's a performance strategy backed by a growing body of scientific research.
For years, athletes have sought legal and effective ways to enhance their performance, and beetroot has emerged as a leading natural supplement. Its popularity stems from its high concentration of dietary nitrates, compounds that the body converts into a molecule with significant effects on our physiology, particularly during intense exercise.
The Science: How Nitrate Becomes Nitric Oxide
The magic of beetroot lies in a simple chemical conversion. When you consume nitrate-rich foods like beetroot, bacteria in your mouth convert the nitrate (NO3−) into nitrite (NO2−). This nitrite then circulates in your blood and, in conditions of low oxygen such as during intense exercise, is converted into nitric oxide (NO). Nitric oxide is a powerful vasodilator, meaning it relaxes and widens your blood vessels. This process enhances blood flow, allowing more oxygen and nutrients to be delivered to your working muscles. The result is improved efficiency; your muscles can produce the same amount of power with less oxygen, delaying fatigue.
From Endurance Aid to Sprinting Secret
Initially, research on beetroot juice focused on its benefits for endurance sports, showing it could reduce the oxygen cost of exercise and extend the time to exhaustion. However, recent studies have shifted focus to high-intensity, short-duration activities like sprinting. The findings are promising. Research indicates that nitrate supplementation can enhance muscle power and improve performance in single and repeated sprints. One study found that beetroot juice improved performance in a 30-second all-out cycling sprint. Another highlighted its ability to enhance repeated sprint performance and even maintain cognitive function during prolonged intermittent exercise, which is highly relevant for team sports like football or rugby.
Decoding 'Micro-Dosing' in This Context
The term "micro-dosing" in the headline can be misleading. In the context of beetroot nitrate, it doesn't refer to the practice associated with psychoactive substances. Instead, it describes a strategic approach to supplementation. Rather than taking a single, massive dose inconsistently, it refers to consuming smaller, regular amounts of nitrate to maintain elevated levels in the body. Some studies have found benefits from supplementation over several days (a loading phase) before a competition. This consistent intake, or 'micro-dosing' strategy, ensures the body's nitrate and nitrite stores are optimised for when they are needed most. The recommended effective dose is typically around 350-500mg of nitrate, taken about two to three hours before exercise.
A Practical Guide for Athletes
For athletes looking to incorporate this into their regimen, consistency is key. A common protocol involves consuming 350-500mg of nitrate daily for several days leading up to an event, with a final dose taken 2-3 hours before the start. This dosage is equivalent to about one or two 70ml concentrated beetroot shots. It's important to choose products that specify their nitrate content, as it can vary widely. Also, a crucial tip: avoid using antiseptic mouthwash, as it can kill the oral bacteria necessary for the first step of converting nitrate to nitrite, rendering the supplement ineffective.
Are There Any Downsides?
Beetroot supplementation is generally considered safe for most people, but there are a few things to be aware of. The most common and harmless side effect is beeturia, which is when your urine or stools turn a reddish or pink colour. This affects about 10-14% of the population and is temporary. Some people may experience mild digestive upset, especially when first introducing concentrated supplements. Because nitrates can lower blood pressure, individuals who already have low blood pressure or are on blood pressure medication should consult a doctor before starting. Similarly, since beets are high in oxalates, those prone to kidney stones should also exercise caution.
