SuperBeets, the popular beetroot powder from HumanN, contains real beetroot-derived nitrates, but independent testing shows it delivers a significantly lower dose than what clinical trials have used to lower blood pressure. A single serving of SuperBeets provides about 1 mmol of nitrate, while the beetroot juice studies showing meaningful blood pressure drops typically use around 6 mmol. That gap matters. When researchers tested SuperBeets directly, it did not produce a significant reduction in either systolic or mean arterial blood pressure, likely because the dose was too low to sustain the chemical chain reaction that relaxes blood vessels.
That doesn’t mean beetroot itself is a dead end for blood pressure. The science behind dietary nitrates and blood pressure is solid. The problem is specifically that SuperBeets doesn’t contain enough of the active ingredient to match what works in studies.
How Beetroot Lowers Blood Pressure
Beets are one of the richest dietary sources of inorganic nitrate. When you eat or drink them, nearly 100% of that nitrate is absorbed in the upper digestive tract. From there, something unusual happens: about 20 to 28% of the nitrate gets concentrated in your salivary glands and secreted back into your mouth. Bacteria living on the back of your tongue, primarily species like Veillonella and Rothia, convert that nitrate into nitrite. You swallow the nitrite, and when it hits your stomach acid, some of it converts into nitric oxide.
Nitric oxide is a signaling molecule that tells blood vessel walls to relax and widen. This is the same pathway targeted by some prescription heart medications. The effect is strongest when oxygen levels in tissues are low, which is exactly when your cardiovascular system needs the most help. Nitrite circulating in your blood can also be converted to nitric oxide by proteins in red blood cells, providing a secondary route to vessel relaxation.
One practical detail worth knowing: antibacterial mouthwash can disrupt this process. Because the conversion depends on specific bacteria on your tongue, killing those bacteria with antiseptic rinses can block the nitrate-to-nitrite step entirely.
What Clinical Trials Actually Show
Across multiple clinical trials, beetroot juice at adequate doses has lowered systolic blood pressure (the top number) by anywhere from 4 to 10 mmHg, with some acute studies showing even larger short-term drops. A few highlights from controlled studies: one trial found a 7.7 mmHg systolic drop that held steady at both 24 hours and 4 weeks. Another saw a 10 mmHg systolic reduction after 3 weeks of daily use, along with a 3 mmHg diastolic decrease. A six-week trial in people with hypertension recorded a more modest 4.1 mmHg systolic drop.
To put those numbers in context, a 5 mmHg reduction in systolic blood pressure is clinically meaningful. It’s in the range of what some first-line blood pressure medications achieve, and population-level data suggests even small sustained reductions lower stroke and heart attack risk.
Not every trial found significant effects, though. At least two studies reported no meaningful blood pressure changes at all. Results tend to be stronger in people who already have high blood pressure compared to those with normal readings, and some studies found effects only in men. The evidence is encouraging but not uniform.
Why SuperBeets Falls Short
The critical issue is dosage. Independent lab analysis published in a peer-reviewed study measured SuperBeets at 1.03 mmol of nitrate per serving. The beetroot juice products that successfully lowered blood pressure in clinical trials delivered roughly 6 mmol per serving, about six times as much. The researchers noted that SuperBeets failed to sustain the initial bump in blood nitrite levels needed to keep nitric oxide production going long enough to affect blood pressure.
This doesn’t mean the product contains fake ingredients or that the company is making things up about beetroot science. The underlying biology is real. But concentrating beets into a small scoop of powder appears to leave much of the active nitrate behind, or at least delivers it in quantities too small to replicate what juice-based studies achieve. You would likely need to take several servings to approach an effective dose, which the product label doesn’t suggest and which would increase cost substantially.
How Long the Effects Last
When beetroot juice does work at adequate doses, blood nitrite levels peak about 2 to 3 hours after consumption. Blood pressure effects in acute studies tend to show up within 2.5 to 3 hours and can persist for up to 6 hours after a single dose. With daily use, a recent meta-analysis found that systolic blood pressure reductions can remain significant for up to 90 days of continuous supplementation, with no sign that the body develops tolerance to the effect.
There’s an important caveat, though. While in-office blood pressure readings improve, the evidence does not support a sustained 24-hour reduction. That means beetroot juice may lower your blood pressure during part of the day but not provide round-the-clock coverage the way most prescription medications do. The effective daily nitrate range identified in research is 200 to 800 mg from beetroot juice.
Better Alternatives to SuperBeets
If you’re interested in using beetroot for blood pressure, concentrated beetroot juice is the form with the strongest clinical evidence. Products that deliver around 6 mmol (roughly 400 mg) of nitrate per serving are closer to what studies have tested. Look for brands that list nitrate content on the label, since the amount varies widely between products. Some beetroot juices marketed to athletes have been independently verified at effective doses.
Whole cooked beets are another option, with near-complete nitrate bioavailability. The challenge is consistency: nitrate content varies depending on the soil, growing conditions, and cooking method, so it’s harder to know exactly how much you’re getting from a plate of roasted beets versus a standardized juice product.
Leafy greens like spinach, arugula, and lettuce are also rich in dietary nitrate and work through the same biological pathway. A diet high in these vegetables provides nitrates alongside potassium, magnesium, and fiber, all of which independently support healthy blood pressure.
Safety Considerations
Beetroot products are generally well tolerated. The most noticeable side effect is beeturia, a harmless reddish discoloration of urine and sometimes stool that can be alarming if you’re not expecting it. It’s not a sign of bleeding or any health problem.
People prone to kidney stones should be cautious with concentrated beet products. Beets are high in oxalic acid, which can contribute to calcium oxalate stones, the most common type. This concern applies more to concentrated powders and juices than to occasional whole beets in your diet, since supplements deliver a more concentrated oxalate load.
If you take blood pressure medication, adding a beetroot product that actually delivers an effective nitrate dose could push your blood pressure lower than intended. This is especially relevant with nitrate-based heart medications, where the combined effect on blood vessel dilation could cause dizziness or fainting.