Beetroot Supplements: You're Buying Nitrate, and Most Labels Won't Tell You How Much
THE SHORT ANSWER
A beetroot supplement is really a nitrate delivery vehicle, and almost nothing on a typical label tells you how much nitrate you are getting. That is the entire problem with the category. Beetroot powders vary enormously in nitrate content depending on the variety, the soil and the processing, and a product that states only "beetroot extract 500 mg" is telling you the weight of the powder rather than the amount of the thing that does the work. Look for a stated nitrate content. Also know that mouthwash blocks the pathway completely, which surprises people.*
01The pathway, because it explains every practical point
Beetroot is a concentrated dietary source of inorganic nitrate. What happens to that nitrate is unusual and genuinely interesting.
Swallowed nitrate is absorbed and a portion is then secreted back into saliva. In the mouth, bacteria living on the back of the tongue reduce nitrate to nitrite. Swallow again, and the acidic environment of the stomach converts some of that nitrite onward to nitric oxide.
Nitric oxide is a signalling molecule involved in the relaxation of blood vessel walls — which is why beetroot appears in products described as supporting circulation and exercise performance.
Three practical consequences fall straight out of that chain, and they are the useful part of this page.
02Antibacterial mouthwash blocks it
This is the most surprising and most useful thing to know about beetroot supplements.
The nitrate-to-nitrite conversion depends on oral bacteria. Humans do not have the enzyme to do it; the bacteria on the tongue do it for us.
Antibacterial mouthwash kills those bacteria. Studies using chlorhexidine mouthwash have shown the nitrate-to-nitrite conversion substantially blunted — which means the beetroot you took is largely wasted.
So if you use antibacterial mouthwash and take a beetroot supplement, they are working against each other. Same for tongue scraping, and to a lesser degree for chewing gum immediately after dosing. Take the beetroot away from your mouthwash routine, or reconsider one of them.
03Timing follows the pathway too
Because the nitrate has to be absorbed, recycled into saliva, converted by bacteria, and then converted again in the stomach, this is not a quick process.
Research on exercise performance has typically dosed two to three hours before the activity, which is when plasma nitrite tends to peak. Taking it fifteen minutes beforehand does not allow the chain to run.
There is also evidence that several days of consistent intake produces a different pattern than a single dose. Both approaches appear in the literature.
04Why the label usually tells you nothing
Here is the core problem with buying in this category.
Nitrate content in beetroot varies enormously. It depends on the beet variety, the nitrogen content of the soil, growing conditions, harvest timing, and how the root was processed and dried. Two beetroot powders of identical weight can differ several-fold in nitrate.
So "beetroot extract 500 mg" describes the powder, not the active. It is the same category of error as reading compound weight instead of elemental mineral — except that here, most of the market does not disclose the number at all.
What to look for instead: a stated nitrate content in milligrams, or a standardisation percentage. A product that has bothered to measure and declare it is telling you something real. Research on exercise typically used doses in the region of several hundred milligrams of nitrate — an amount you simply cannot verify against a label that does not mention nitrate.
Our Beet Nitric Oxide exists for that reason, and the certificate for your lot is published on the certificate page.
05Juice, powder, or the vegetable
Beetroot juice is what most of the research used, particularly concentrated juice shots. It works. It is bulky, perishable, and not to everyone's taste.
Powder and capsules are convenient and stable. The question is always how much nitrate survived processing — some drying methods preserve it better than others.
Whole beetroot is a genuinely good source, along with rocket, spinach and other leafy greens which are nitrate-rich as well. Same variability caveat, and the same honest observation we would make about most supplements: if you eat these things regularly, you are already getting nitrate.
06Things worth knowing before you start
Beeturia. Beetroot can turn urine and stools pink or red. It is harmless and startling. Knowing in advance saves an unnecessary fright.
Oxalate. Beetroot is relatively high in oxalate, which is worth raising with a doctor if you have a history of kidney stones.
Medication. If you take anything affecting blood pressure or circulation, or nitrate medication, speak to a pharmacist before adding a beetroot supplement. The pathway above is the reason — this is a real interaction question rather than a boilerplate line.
07Checking a label
Is nitrate content stated? The single most important check. If not, you cannot compare products at all.
Is it standardised? A percentage tells you the manufacturer measures it.
Is it a proprietary blend? Beetroot is frequently combined with citrulline, arginine and various botanicals. Hidden splits mean you cannot know your nitrate dose.
Does it contain added nitrate sources? Some products add other nitrate-rich extracts. Fine, but it should be disclosed.
Is there a certificate for your lot? Root vegetables draw from soil, which makes heavy metal testing genuinely relevant here rather than a formality.
08Frequently asked questions
What should I look for in a beetroot supplement?
A stated nitrate content or standardisation percentage. Without it you are comparing powder weights, which vary several-fold in what actually matters.
Does mouthwash really stop beetroot working?
Antibacterial mouthwash kills the oral bacteria that convert nitrate to nitrite — a step humans cannot perform without them. Studies show the conversion substantially blunted.
When should I take beetroot before exercise?
Research has typically dosed two to three hours beforehand, which is when plasma nitrite tends to peak. Taking it minutes before does not allow the pathway to run.
Is beetroot juice better than powder?
Juice is what most research used and is reliable. Powder is more convenient; the question is how much nitrate survived processing, which is why a stated nitrate figure matters.
Why is my urine pink?
Beeturia — harmless pigment from the beetroot passing through. Startling the first time, and entirely normal.
Can I just eat beetroot instead?
Yes, along with rocket and spinach, which are also nitrate-rich. The same variability caveat applies, but if you eat these regularly you are already getting nitrate.
Does beetroot interact with medication?
Ask a pharmacist if you take anything affecting blood pressure or circulation, or nitrate medication. The nitric oxide pathway is the reason this is a genuine question.
Should I take beetroot every day or only before exercise?
Both patterns appear in the research — acute dosing before activity and several days of consistent intake produce somewhat different profiles.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
