Nitralis Review: Does a 200% Nitric Oxide Increase Really Matter?
I recently decided to try DoNotAge’s latest nitric oxide booster, Nitralis®. With nitric oxide production declining significantly after 40, supporting circulation becomes increasingly important — not just for heart health, but also for energy, recovery, cognitive clarity, and overall longevity. After reading the clinical trial data, I wanted to take a closer look at how the Nitralis supplement works, and what the research actually shows.
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Introduction: Why Nitric Oxide Gets So Much Attention
Nitric oxide is often described as a “youth molecule” because it controls blood vessel flexibility, oxygen delivery, and endothelial health. Production declines with age, which is why nitric oxide supplements are popular in longevity and performance circles.
Recently, Nitralis® from DoNotAge has claimed to increase nitric oxide levels by more than 200% in a human trial.
But what does that actually mean?
Firstly, What Is Nitralis?
Nitralis® is a nitric oxide–support supplement developed by DoNotAge. Unlike many pre-workout or circulation products that rely primarily on L-arginine, Nitralis is formulated to stimulate the nitrate–nitrite–nitric oxide pathway — a pathway that tends to remain functional even as we age.
Nitric oxide (NO) is a signalling molecule responsible for relaxing blood vessels (vasodilation), improving blood flow, and supporting endothelial function. Because natural nitric oxide production declines with age, strategies that enhance its availability have become increasingly popular in longevity and performance circles.
Rather than focusing on a single ingredient, Nitralis combines three compounds designed to support different stages of nitric oxide production and stability:
Nitralis Ingredients
Fermented Beet (Dietary Nitrates)
Provides nitrates that are converted into nitrites by oral bacteria, and then into nitric oxide within the body via the nitrate–nitrite pathway.
Epimedium (Icariin)
A botanical extract that may support nitric oxide signalling by influencing endothelial nitric oxide synthase (eNOS) activity and helping sustain downstream cGMP signalling.
Magnesium Ascorbate
A combination of magnesium and vitamin C that supports vascular relaxation and helps protect nitric oxide from oxidative breakdown.
Together, these ingredients aim to support nitric oxide production through multiple mechanisms rather than relying solely on the traditional arginine pathway.
How Nitric Oxide Works
The body produces nitric oxide (NO) through two primary pathways.
1. The eNOS / Arginine Pathway
The first and most well-known route involves an enzyme called endothelial nitric oxide synthase (eNOS). This enzyme converts the amino acid L-arginine into nitric oxide inside the lining of our blood vessels.
In younger, healthy individuals, this pathway functions efficiently. Nitric oxide is produced on demand to relax blood vessels, regulate blood pressure, and maintain endothelial flexibility.
However, as we age, several factors can reduce the efficiency of this system:
- Oxidative stress
- Reduced availability of key cofactors (such as BH₄)
- Endothelial dysfunction
- Chronic inflammation
When eNOS becomes less efficient — sometimes referred to as “uncoupling” — nitric oxide production declines. This does not mean the arginine pathway stops working entirely, but it may become less responsive over time.
This is one reason why L-arginine supplements often produce mixed results in older adults.
2. The Nitrate–Nitrite Pathway
The second pathway is known as the nitrate–nitrite–nitric oxide pathway.
This route does not rely on eNOS. Instead, it begins with dietary nitrates, commonly found in vegetables like beetroot and leafy greens.
Here’s how it works:
- Nitrates are consumed through food or supplementation.
- Oral bacteria convert nitrates into nitrites.
- Nitrites are then converted into nitric oxide in the bloodstream, particularly under low-oxygen conditions.
Importantly, this pathway tends to remain functional with age. It acts as a complementary system to the eNOS pathway and can help maintain nitric oxide availability even when enzymatic production becomes less efficient.
This is why beetroot-based supplementation strategies have consistently shown effects on blood flow and endothelial function in clinical research.
In simple terms:
The eNOS pathway produces nitric oxide internally using arginine.
The nitrate pathway allows us to generate nitric oxide from dietary sources.
Nitralis is designed to support the second pathway, while also including ingredients that may help optimise nitric oxide signalling and stability overall.
The Clinical Trial: What It Actually Measured
Nitralis® is supported by a 30-day randomized, placebo-controlled human study involving 85 adults aged 30–70. The headline result — a more than 200% increase in nitric oxide — comes from this trial.
However, it’s important to understand what was actually measured.
The researchers measured salivary nitric oxide levels, which are used as a proxy marker for systemic nitric oxide availability. Salivary testing reflects activity within the nitrate–nitrite pathway and provides an indication of biological nitric oxide production.
Key Findings from the Study
- +226% mean increase in nitric oxide levels from baseline
- +108-unit average change compared to negligible change in placebo
- 60.5% responder rate (defined as a ≥70-unit increase) vs 11.9% in placebo
- 30-day duration
Statistically, the increase was significant. Biologically, it suggests that the formulation is active and capable of stimulating nitric oxide production through the nitrate pathway.
That’s the positive signal.
What the Trial Did Not Measure
Equally important is what the study did not assess.
The trial did not directly measure:
- Blood pressure
- Arterial stiffness
- VO₂ max or exercise performance
- Endothelial flow-mediated dilation
- Long-term cardiovascular outcomes
In other words, the study demonstrated a meaningful increase in a nitric oxide biomarker — but it did not measure clinical endpoints.
This distinction matters.
An increase in nitric oxide availability is promising, especially given what we know about vascular biology. But biomarker improvement does not automatically guarantee reductions in blood pressure or measurable changes in cardiovascular risk.
Larger, longer-term studies that assess real-world outcomes would strengthen the case further.
Does More Nitric Oxide Automatically Mean Better Health?
Nitric oxide plays a central role in vascular biology. Higher nitric oxide availability is associated with:
- Vasodilation — relaxation and widening of blood vessels
- Improved endothelial function — healthier, more responsive arteries
- Better circulation — enhanced delivery of oxygen and nutrients
In both younger and older adults, impaired nitric oxide signalling is linked to endothelial dysfunction, arterial stiffness, and increased cardiovascular risk. So, from a physiological standpoint, restoring nitric oxide makes sense.
However, it’s important to stay grounded in what the data actually show.
An increase in a biomarker — such as salivary nitric oxide — does not automatically translate into clinical outcomes like lower blood pressure, improved exercise capacity, or reduced cardiovascular events. Biology is rarely that linear.
Nitric oxide is part of a complex system involving oxidative stress, inflammation, mitochondrial function, and vascular tone. Improving one marker is promising, but long-term effects require larger studies that measure real-world health outcomes.
There is also a practical consideration: nitric oxide influences blood vessel relaxation. Individuals taking blood pressure medications, nitrates, or PDE-5 inhibitors (such as those used for erectile dysfunction) should be cautious, as combining these with nitric oxide–enhancing strategies could potentially amplify vasodilation and lower blood pressure further.
For healthy individuals, supporting nitric oxide production through diet and targeted supplementation appears physiologically reasonable. But context, dosage, and individual health status matter.
That balance is what separates thoughtful supplementation from marketing enthusiasm.
Nitralis® Ingredients: A Closer Look at the Formula
Nitralis combines three ingredients designed to support nitric oxide production through complementary mechanisms. Rather than relying on a single compound, the formula appears structured around a supply–signal–protect model.
Here’s what that means in practical terms.
1️⃣ Fermented Beet – The Nitrate Source
Beetroot is one of the most studied dietary sources of nitrates. When consumed, nitrates are converted by oral bacteria into nitrites, and then into nitric oxide within the bloodstream.
This pathway has been shown in multiple studies to:
- Improve endothelial function
- Lower blood pressure modestly in some individuals
- Enhance exercise efficiency in certain populations
The “fermented” aspect may increase bioavailability and potentially support gut-derived nitrate metabolism, although specific nitrate content per capsule would ultimately determine potency.
One important factor is dosage. Many beetroot studies use standardized nitrate amounts (often several hundred milligrams of nitrate). Without knowing the exact nitrate yield per serving, it’s difficult to directly compare Nitralis to clinical beetroot trials.
That doesn’t invalidate the formula — it simply highlights the importance of dose transparency when evaluating efficacy.
2️⃣ Epimedium (Icariin) – Supporting the Signalling Cascade
Epimedium contains icariin, a flavonoid that may support nitric oxide signalling in two ways:
- Mild stimulation of endothelial nitric oxide synthase (eNOS)
- Mild inhibition of phosphodiesterase-5 (PDE-5), which helps sustain cyclic GMP (cGMP), the downstream messenger of nitric oxide
In simple terms, nitric oxide sends the signal, and cGMP carries that signal forward to relax blood vessels. By slowing the breakdown of cGMP, icariin may help prolong nitric oxide’s effect.
It’s important to note that epimedium is not equivalent in strength to prescription PDE-5 inhibitors. Its effect is considerably milder, but potentially synergistic within a broader formulation.
3️⃣ Magnesium Ascorbate – Stability and Vascular Support
Magnesium ascorbate combines magnesium and vitamin C.
Vitamin C plays a role in maintaining proper eNOS function by helping regenerate tetrahydrobiopterin (BH₄), a cofactor required for nitric oxide production. When BH₄ levels drop, eNOS can become “uncoupled,” producing oxidative stress instead of nitric oxide.
Magnesium contributes independently to vascular relaxation and supports normal blood pressure regulation.
Together, this component may help:
- Protect nitric oxide from oxidative breakdown
- Support endothelial stability
- Complement both nitric oxide pathways
Overall Formula Assessment
From a mechanistic perspective, Nitralis appears thoughtfully designed.
- Fermented beet supplies nitrates.
- Epimedium supports signalling.
- Magnesium ascorbate helps protect and stabilize nitric oxide activity.
The multi-pathway approach is scientifically rational.
The key open questions remain around:
- Exact dosing
- Long-term outcome data
- Direct clinical impact beyond biomarker improvement
But from a biological standpoint, the formulation is coherent and strategically constructed.
Who Might Benefit Most from Nitralis®?
Nitralis isn’t a universal necessity. But there are specific groups who may find nitric oxide support particularly relevant — especially as we age.
1. Adults Over 40 Focused on Vascular Aging
One of the earliest shifts in aging biology is endothelial dysfunction — a gradual decline in the flexibility and responsiveness of blood vessels.
Nitric oxide is central to maintaining arterial elasticity. As endogenous production declines with age, supporting this pathway may help preserve vascular resilience.
For individuals interested in healthy aging — not just lifespan, but healthspan — nitric oxide support becomes more meaningful after 40, when vascular changes begin to accelerate.
2. Those Tracking Performance and Recovery
Nitric oxide enhances blood flow and oxygen delivery to working muscles. In certain studies, nitrate supplementation has reduced the oxygen cost of exercise and improved exercise efficiency.
If you’re strength training, doing cardio, or working toward improved recovery metrics (including HRV), supporting circulation may be one piece of the puzzle.
It’s not a shortcut. But it may help optimise oxygen and nutrient delivery — particularly in individuals noticing slower recovery with age.
3. Individuals Concerned About Circulation
People who experience:
- Cold hands and feet
- Reduced exercise tolerance
- Sedentary work patterns
- Mild age-related increases in blood pressure
may be drawn to nitric oxide strategies because circulation underpins all of these experiences.
That said, anyone with diagnosed hypertension or on blood pressure medication should consult their healthcare provider before introducing vasodilatory supplements.
4. Those Interested in Cognitive and Brain Perfusion Support
The brain is highly dependent on blood flow. While the Nitralis trial did not measure cognitive outcomes, nitric oxide plays a role in cerebral perfusion.
Supporting vascular health indirectly supports brain health — particularly as we age.
Again, this is physiological reasoning, not a direct clinical claim.
Who May Want to Be Cautious
Nitric oxide–enhancing supplements may not be appropriate for everyone.
Caution is advised for individuals:
- On blood pressure medication
- Taking nitrates or PDE-5 inhibitors
- Prone to low blood pressure or dizziness
- With complex cardiovascular conditions
Nitric oxide influences vascular tone. More is not always better — balance is key.
Is Nitralis® Worth £73?
Nitralis sits at the premium end of nitric oxide supplements at £73 for 60 capsules — so it’s fair to ask whether it justifies the price.
In my view, what separates Nitralis from standard nitric oxide boosters is not just the inclusion of beetroot. It’s the multi-pathway strategy and the fact that it has already been tested in a randomized, placebo-controlled human study showing a significant biological effect.
Most nitric oxide products rely on L-arginine alone. Nitralis instead supports:
- The nitrate–nitrite pathway
- Nitric oxide signalling sustainability
- Protection against oxidative breakdown
That layered approach is what makes it different.
If you are over 40 and thinking seriously about vascular aging, circulation, recovery, and long-term cardiovascular resilience, nitric oxide support becomes increasingly relevant.
And rather than piecing together separate ingredients, Nitralis offers a clinically tested, research-grade formulation in one capsule.
For me, that convenience — combined with the early human data — makes it a compelling option.
How to Get 10% Off
If you’d like to try Nitralis, you can use my DoNotAge discount code NURSE at checkout for 10% off your order (I may earn a commission)
That brings the price down and makes it easier to test for yourself.
You can order directly from DoNotAge here.
My Personal Take
After reviewing the science and testing Nitralis myself, I’m genuinely impressed with the formulation strategy. Nitric oxide decline is one of the most overlooked aspects of aging, and maintaining vascular flexibility becomes increasingly important as we move into our 40s and beyond.
If you’re already investing in longevity — whether through NMN, strength training, nutrition, or recovery — nitric oxide support is a logical addition.
And Nitralis is currently one of the more intelligently designed options available.
