Beetroot juice went from humble vegetable to sports-nutrition star, and unusually for a natural product, there is real science behind the hype. The story centers on nitric oxide, a molecule that helps blood vessels relax. Here is how it works and where it genuinely helps.
The nitrate to nitric oxide pathway
Beetroot is rich in dietary nitrates. When you eat them, bacteria in your mouth and your body convert nitrates into nitrites and then into nitric oxide. Nitric oxide signals blood vessels to widen, which can improve blood flow and slightly lower the oxygen cost of exercise. This is the mechanism behind beetroot's reputation.
Where the evidence is strongest: exercise
The best-supported benefit is for endurance and exercise efficiency. Studies suggest beetroot or concentrated beet "shots" can modestly improve stamina and how efficiently muscles use oxygen, especially in recreational athletes. The effect is real but modest, not transformative.
Blood pressure and circulation
Dietary nitrates from beetroot have also been studied for a small, temporary lowering of blood pressure through the same vessel-relaxing pathway. This is general wellness information, not a treatment plan; anyone managing blood pressure should work with their doctor rather than relying on juice.
How to use it
| Form | Notes |
|---|---|
| Beetroot juice | Effective but bulky; some find the taste earthy |
| Concentrated "beet shots" | A standardized nitrate dose in a small volume |
| Whole roasted beets | Nutritious food source; lower, variable nitrate |
| Beetroot powder | Convenient; check the nitrate content, not just beet content |
For exercise, studies often take beetroot a couple of hours before activity, and sometimes for several days beforehand for a fuller effect.
Harmless surprises
Beetroot can turn urine or stools pink or red, which is harmless and known as beeturia, though it can be alarming the first time. It is not blood.
Safety notes
Beetroot is a food and very safe for most people. Those with a history of kidney stones may be advised to moderate high-oxalate foods, and anyone on blood-pressure medication should talk to their doctor before adding concentrated nitrate products.
Whole beets vs concentrated shots
There is a meaningful difference between eating beetroot as food and using it as a performance aid. Whole roasted or grated beets are a nutritious vegetable, delivering fiber, folate and plant compounds along with nitrates, but their nitrate content varies with growing conditions and cooking. Concentrated juice or "beet shots" are standardized to deliver a known, higher nitrate dose in a small volume, which is why studies on exercise tend to use them rather than a plate of beets.
For everyday health, simply enjoying beets as part of a varied diet is the sensible approach and needs no special timing. For a specific athletic goal, a standardized shot taken a couple of hours before activity gives a more reliable effect. Choosing between them comes down to your aim: general nutrition, or a measured, repeatable dose for training.
Realistic expectations for athletes
Beetroot is one of the few natural products with genuine exercise evidence, but the effect is a modest edge, not a transformation. It appears to help most in endurance and sustained efforts, and more in recreational athletes than in highly trained ones, whose bodies are already very efficient. If you try it, treat it as a small marginal gain layered on top of proper training, fueling, hydration and rest, the things that actually determine performance.
It also pays to test it in training before relying on it for an event, since the earthy taste and the harmless pink urine can be off-putting if they catch you by surprise. Used with realistic expectations and a bit of planning, beetroot is a safe, evidence-backed little helper, one of the more honest options in a category full of hype.
Common questions
When should I take it before exercise? Research often has people consume beetroot or a beet shot a couple of hours before activity, since it takes time for the nitrate-to-nitric-oxide process to peak. For a bigger effect, some protocols use it daily for several days beforehand rather than a single dose.
Why does mouthwash matter? Bacteria in your mouth perform a key early step in converting nitrate toward nitric oxide. Strong antibacterial mouthwash around the time you take beetroot can blunt the effect, so it is best avoided close to your beet dose if performance is the goal.
Is the pink urine a problem? No. Beetroot can harmlessly tint urine or stools pink or red, known as beeturia. It can be startling the first time but is not blood and needs no concern.
Whole beets or a shot? Whole beets are a nutritious food but their nitrate content varies. Concentrated shots give a standardized, reliable dose, which is why studies use them. For general health, eat the vegetable; for a specific training effect, a shot is more consistent.
The bottom line
Beetroot is a rare natural product with genuine, if modest, evidence, mainly for exercise efficiency, via the nitric-oxide pathway. Whole beets are a healthy food; juice or shots offer a more reliable dose. Keep expectations realistic and involve your doctor for anything related to blood pressure.