The short answer
Astragalus root, also called Huang Qi, has a long history of use in traditional Chinese medicine for kidney-related conditions. Modern research has found some potentially beneficial effects, particularly on proteinuria, albuminuria, and serum creatinine in certain groups of people with chronic kidney disease (CKD).
However, the evidence is not strong enough to consider astragalus a proven treatment for CKD or a supplement that can prevent kidney failure. Many studies have been small, used different astragalus preparations, or had methodological limitations. The 2024 NCCIH review also concluded that there is not yet sufficient reliable evidence to establish astragalus as useful for any health condition. (NCCIH)
So the most accurate interpretation is:
Astragalus is promising but unproven as an adjunct to conventional kidney care. It should not replace evidence-based CKD treatment.
What is astragalus root?
Astragalus is a plant whose root, particularly Astragalus membranaceus and related varieties, has been used for centuries in traditional Chinese medicine. It is commonly known as Huang Qi.
Modern research has investigated compounds in astragalus, including astragalosides, for possible antioxidant, anti-inflammatory, immune-modulating, and kidney-related effects.
Some of these mechanisms are biologically interesting. But a biological mechanism or laboratory finding does not automatically mean that taking the herb improves kidney outcomes in patients.
That distinction is important when evaluating herbal kidney remedies.
What does modern kidney research actually show?
Research has produced encouraging signals, but the quality and consistency of the evidence remain concerns.
An older Cochrane review identified 22 studies involving 1,323 participants with CKD. Some studies reported improvements in serum creatinine, creatinine clearance, proteinuria, anemia, or nutritional measures. However, the overall evidence quality was low, and the studies did not provide reliable information about major outcomes such as death, progression to dialysis, or kidney transplantation. (PubMed Central (PMC))
More recent research has continued to investigate the question.
Diabetic kidney disease
Astragalus has been studied as an add-on treatment in diabetic kidney disease, rather than as a replacement for standard medical therapy.
A 2024 systematic review of plant-based compounds and medicinal plants noted that available astragalus studies in CKD remain limited and that additional well-designed randomized trials are needed. (PubMed Central (PMC))
A particularly relevant randomized trial published in 2024 included 118 people with type 2 diabetes, CKD, and significant albuminuria. Participants received either standard care alone or standard care plus oral astragalus granules for 48 weeks. The study was designed specifically to investigate whether astragalus could influence kidney-function decline. (PubMed)
This is important because it represents stronger evidence than laboratory or animal research. Nevertheless, a single relatively small trial cannot establish astragalus as a proven kidney-protective treatment.
Proteinuria and membranous nephropathy
Another area of interest is membranous nephropathy, a kidney disease in which abnormal protein leakage into the urine can occur.
A meta-analysis involving 50 studies and 3,423 participants reported that astragalus-containing preparations used alongside supportive or immunosuppressive treatment were associated with improvements in proteinuria, serum albumin, serum creatinine, and remission measures. However, the authors also highlighted limitations in the underlying studies and called for better randomized trials. (PubMed Central (PMC))
Therefore, these findings are signals of possible benefit, not proof that astragalus independently treats membranous nephropathy.
Could astragalus lower creatinine?
Possibly, but this needs careful interpretation.
Several studies have reported lower serum creatinine after astragalus treatment. Creatinine is a waste product commonly used to estimate kidney filtration.
But:
A lower creatinine value does not automatically prove that a supplement has slowed kidney disease.
Researchers ideally want to know whether treatment produces meaningful outcomes such as:
- slower long-term eGFR decline
- less progression to kidney failure
- reduced need for dialysis
- fewer complications
- improved quality of life
- improved survival
Much of the astragalus literature has focused instead on laboratory measurements over relatively short periods.
That is one reason the evidence remains uncertain.
Why traditional claims and modern evidence can differ
Traditional medicine may describe astragalus as a tonic that supports vitality or kidney function. Modern medicine asks more specific questions:
- Does it improve eGFR?
- Does it reduce albuminuria?
- Does it slow CKD progression?
- Does it prevent dialysis?
- Does it improve survival?
- Is it safe when combined with prescription medications?
- Which preparation and dose are actually effective?
These are different standards of evidence.
Traditional use can provide a reason for scientists to investigate a plant, but traditional use alone cannot establish clinical effectiveness.
What about astragaloside IV?
Astragaloside IV is one of the compounds found in astragalus and has attracted considerable laboratory research.
Animal and experimental studies have investigated possible effects on inflammation, oxidative stress, fibrosis, and kidney injury.
For example, a 2026 experimental study found that astragaloside IV reduced kidney injury in a mouse model of cisplatin-induced acute kidney injury and proposed an inflammatory mechanism involving the NLRP3 inflammasome. (PubMed)
That is scientifically interesting, but it is not evidence that astragalus prevents or treats acute kidney injury in humans.
Animal research should therefore be viewed as an early step in understanding a possible treatment, not as proof of clinical effectiveness.
Is astragalus safe if you have CKD?
This is where caution is especially important.
The fact that something is an herb does not make it automatically safe for someone with reduced kidney function.
People with CKD may have altered handling of substances, take several medications, or have electrolyte and blood-pressure problems that make supplements more complicated.
The NCCIH notes that the overall safety of astragalus has not been thoroughly evaluated. It also warns that astragalus may worsen autoimmune disease and may interact with medicines that suppress the immune system. (NCCIH)
Reported concerns can include:
- allergic reactions
- gastrointestinal symptoms
- possible medication interactions
- uncertain effects from multi-herb preparations
- variation in product strength and ingredients
The quality of commercially available supplements can also differ considerably from the standardized preparations used in research.
Should people with CKD take astragalus?
There is currently no good reason to recommend astragalus routinely to every person with CKD.
If you are considering it, discuss it with your doctor or nephrologist first, particularly if you:
- have advanced CKD
- are receiving dialysis
- have an autoimmune disease
- take immunosuppressive medication
- take several prescription medications
- are pregnant or breastfeeding
- have recently developed a change in kidney function
Most importantly, do not use astragalus instead of prescribed kidney-protective treatment.
For CKD, proven interventions such as appropriate blood-pressure control, diabetes management, albuminuria treatment, medication review, dietary management, and other evidence-based therapies generally have much stronger clinical support.
What should you look for if you are researching an astragalus product?
Do not judge a product simply by phrases such as kidney detox, kidney repair, or natural kidney protection.
Ask:
- What exact species and preparation does it contain?
- Was this specific preparation studied in humans?
- Were participants actually diagnosed with the kidney condition I have?
- Was the study randomized and adequately controlled?
- How long were participants followed?
- Were meaningful kidney outcomes measured, or only laboratory markers?
- Were adverse effects and medication interactions adequately studied?
A supplement cannot be assumed to have the same effects as an extract, injection, decoction, or standardized research preparation.
What should someone with CKD do instead?
If you are interested in astragalus because your kidney tests have changed, start with the reason for the kidney abnormality, rather than trying to treat the number with a supplement.
Depending on your situation, your clinician may review:
- eGFR and creatinine trends
- urine albumin or protein
- blood pressure
- diabetes control
- potassium and other electrolytes
- current medications
- recent illness or dehydration
- kidney imaging when appropriate
One abnormal creatinine or eGFR result does not automatically establish that CKD is progressing.
Likewise, a supplement that produces a small change in creatinine does not necessarily mean that the underlying disease has been slowed.
Bottom line
Astragalus root has a credible traditional history and an interesting body of modern research, but it has not yet crossed the line from promising herbal therapy to proven kidney treatment.
Some clinical studies suggest that astragalus-containing preparations may reduce proteinuria or serum creatinine when added to conventional treatment, particularly in certain kidney diseases. However, important limitations remain, including small studies, variable preparations, methodological concerns, and limited evidence for long-term outcomes such as preventing dialysis or kidney failure. (NCCIH)
For someone with CKD, the safest approach is to treat astragalus as an unproven adjunct, not a kidney cure. If you are considering it, review the exact product and your medications with a healthcare professional before taking it.