ADMA and SDMA (kidney and vascular risk) — what the test measures and how to read it Biomarker Testing
It measures ADMA and SDMA, methylarginines linked to nitric oxide signaling and kidney filtration, with easy ordering and Quest labs via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
ADMA and SDMA are two closely related blood markers that can add context when you are trying to understand kidney health and vascular (blood vessel) risk beyond a single creatinine or eGFR number.
They are often discussed in the setting of high blood pressure, early kidney stress, or cardiovascular risk refinement, especially when your standard labs look “okay” but you still want a clearer picture.
Because these markers can move for different reasons, the most useful approach is to interpret them alongside kidney labs, urine testing, and your medications, rather than treating one number as a diagnosis.
Do I need a ADMA and SDMA test?
You might consider ADMA and SDMA testing if you have hypertension, diabetes, a family history of kidney disease, or a history of cardiovascular disease and you want a more nuanced look at risk than creatinine alone provides.
This test can also be helpful when your creatinine and eGFR have been stable, but you and your clinician still suspect early kidney stress (for example, rising blood pressure, increasing albumin in urine, or medication changes that affect kidney blood flow).
If you are adjusting therapies that influence kidney function or vascular tone—such as ACE inhibitors/ARBs, SGLT2 inhibitors, diuretics, or intensive blood pressure targets—tracking ADMA/SDMA trends may help you discuss whether the overall pattern is improving.
Testing supports clinician-directed care and shared decision-making. It is not meant to diagnose kidney disease or cardiovascular disease on its own.
ADMA and SDMA are measured in a CLIA-certified laboratory; results should be interpreted in clinical context and are not a standalone diagnosis.
Lab testing
Order ADMA and SDMA testing (or add a kidney baseline panel)
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault lets you order ADMA and SDMA testing directly, then complete your blood draw through a nationwide lab network. You can use the result to have a more specific conversation about kidney filtration, vascular health, and what to monitor next.
If your results raise questions, PocketMD can help you translate the numbers into plain language and connect them to related labs like creatinine, eGFR, cystatin C, urine albumin-to-creatinine ratio (ACR), and blood pressure trends.
Many people get the most value by pairing ADMA/SDMA with an integrated kidney baseline (blood and urine) and then repeating the same set after a medication change or a lifestyle plan, so you can see whether the direction of change matches your goals.
- Order online and test through a nationwide lab network
- PocketMD explanations that focus on patterns, not panic
- Designed for trending over time, especially after care-plan changes
Key benefits of ADMA and SDMA testing
- Adds kidney and vascular context when creatinine and eGFR feel “too normal” for your symptoms or risk profile.
- Helps separate filtration-related signal (SDMA) from nitric-oxide pathway signal (ADMA) when interpreting risk.
- Supports earlier conversations about kidney protection in hypertension, diabetes, and metabolic risk.
- Can be trended over time to evaluate whether a blood pressure or kidney-focused plan is moving in the right direction.
- Improves interpretation of borderline kidney results when hydration, muscle mass, or diet may distort creatinine.
- Pairs well with urine albumin testing to refine whether risk is more “kidney filtration” vs “kidney damage” pattern.
- Gives you a clear, reportable number you can review with PocketMD and bring to your clinician for next-step planning.
What is ADMA and SDMA?
ADMA (asymmetric dimethylarginine) and SDMA (symmetric dimethylarginine) are naturally occurring molecules made when your body breaks down proteins that contain methylated arginine. They circulate in the blood and are cleared or processed through pathways that involve the kidneys.
They matter because they can reflect two related but different themes. SDMA is more tightly linked to kidney filtration and tends to rise when kidney clearance is reduced. ADMA is often discussed as a marker connected to endothelial function because it can interfere with nitric oxide signaling, which is important for healthy blood vessel relaxation and blood pressure regulation.
Neither marker replaces standard kidney testing. Instead, they can add another layer of information when you are trying to understand risk, explain a confusing pattern, or decide what to monitor next.
How SDMA relates to kidney filtration
SDMA is largely eliminated by the kidneys. When filtration declines, SDMA can rise, sometimes earlier than creatinine changes in certain people. This is one reason it is sometimes used as an “additional lens” on kidney function, especially when creatinine may be less reliable due to low or high muscle mass.
How ADMA relates to blood vessels and blood pressure
ADMA can inhibit nitric oxide synthase, which can reduce nitric oxide availability. Lower nitric oxide signaling is associated with stiffer blood vessels and higher vascular tone. In practice, an elevated ADMA may show up in people with cardiometabolic risk, inflammation, oxidative stress, or kidney impairment, so it is best interpreted as part of a broader picture.
Why these markers are often interpreted together
Because ADMA and SDMA can move for overlapping reasons, looking at both can help you avoid over-interpreting a single number. For example, a pattern that suggests reduced filtration (higher SDMA) may call for confirming kidney status with eGFR, cystatin C, and urine ACR, while a pattern that emphasizes vascular risk (higher ADMA with less SDMA change) may push the conversation toward blood pressure control and cardiometabolic drivers.
What do my ADMA and SDMA results mean?
Low ADMA and/or SDMA levels
A low result is usually not a sign of disease and is often interpreted as lower burden from the processes these markers reflect. If SDMA is low, it generally aligns with good kidney clearance in the context of other normal kidney labs. If ADMA is low, it may be consistent with healthier nitric oxide signaling, but it still should be read alongside blood pressure, lipids, glucose, and inflammation markers.
Optimal (in-range) ADMA and SDMA levels
An in-range result suggests there is no strong signal of reduced kidney clearance (SDMA) or elevated methylarginine-related vascular stress (ADMA) at the time of testing. This is most reassuring when it matches other findings such as stable eGFR, normal urine albumin, and controlled blood pressure. If you are monitoring a condition, the trend over time and the overall pattern across kidney and cardiovascular markers is often more informative than a single “normal” value.
High ADMA and/or SDMA levels
A high SDMA commonly points toward reduced kidney filtration or reduced kidney clearance, especially if it rises along with creatinine changes or a falling eGFR. A high ADMA can suggest reduced nitric oxide signaling and higher vascular stress, but it is not specific and can be influenced by kidney function, metabolic health, and inflammation. If either marker is elevated, it is reasonable to confirm the broader context with kidney blood tests, urine albumin testing, blood pressure data, and a medication review.
Factors that influence ADMA and SDMA
Kidney function is a major driver, particularly for SDMA, so dehydration, acute illness, or changes in kidney blood flow can shift results. Cardiometabolic factors such as insulin resistance, oxidative stress, and systemic inflammation can influence ADMA and may track with blood pressure control and vascular health. Medications and supplements that affect kidney perfusion or nitric oxide pathways can also change the pattern, which is why timing your test around stable routines (and noting recent changes) helps interpretation. Finally, different labs and methods can have different reference ranges, so compare results using the same lab when you are trending.
What’s included
- Adma
- Sdma
Frequently Asked Questions
What is the difference between ADMA and SDMA?
They are related molecules, but they tend to answer slightly different questions. SDMA is more closely tied to kidney filtration and clearance, while ADMA is often discussed in relation to nitric oxide signaling and endothelial (blood vessel) function. Looking at both can help you understand whether the stronger signal is kidney clearance, vascular stress, or a mix.
Is SDMA better than creatinine or eGFR for kidney function?
SDMA is not a replacement for creatinine or eGFR, but it can add context. Creatinine is influenced by muscle mass, diet, and hydration, while SDMA can sometimes reflect reduced clearance with less dependence on muscle. The most reliable approach is to interpret SDMA alongside creatinine/eGFR, and sometimes cystatin C and urine albumin-to-creatinine ratio.
Do I need to fast for an ADMA and SDMA blood test?
Fasting is not always required for ADMA/SDMA specifically, but your clinician or lab order may bundle it with other tests that do require fasting (such as lipids or glucose/insulin markers). If you are trending results over time, using similar conditions each time (fasted vs not, time of day, hydration) can make comparisons more meaningful.
What does high ADMA mean for blood pressure or cardiovascular risk?
Higher ADMA is associated with reduced nitric oxide availability, which can relate to higher vascular tone and endothelial dysfunction. It does not diagnose a cardiovascular condition by itself, but it can support a more detailed risk discussion—especially when paired with blood pressure readings, kidney markers, lipids, and metabolic labs.
Can kidney disease raise ADMA and SDMA even if creatinine is normal?
Yes, it can happen. Early kidney stress or reduced clearance may not always show up immediately as an abnormal creatinine, particularly in people with lower muscle mass or fluctuating hydration. If ADMA/SDMA are elevated while creatinine looks normal, it is a reason to look at the full kidney picture, including eGFR trend, cystatin C (if available), and urine albumin testing.
How often should I retest ADMA and SDMA?
It depends on why you tested. If you are establishing a baseline, repeating in a few months can help confirm whether the result is stable. If you changed blood pressure medications, started a kidney-protective therapy, or made a major lifestyle change, retesting after an appropriate interval (often 8–16 weeks) can help you see whether the overall pattern is improving.