Nut Grass
At a glance
- Best for
- no use is well established in humans; mainly traditional
- Typical dose
- preparation-dependent; follow product directions
- Time to effect
- Uncertain
- Main caution
- human evidence is minimal and safety in long-term use is not well characterized
What is it
Nut grass (Cyperus rotundus) is a sedge whose rhizome (tuber) is used in Ayurvedic and traditional Chinese medicine, where it is known as musta or nagarmotha. It is taken as a powder or extract, traditionally for digestive complaints, menstrual issues, and inflammation. Human clinical evidence is very limited, with most data from animal and laboratory studies.
Is it worth it for you?
Worth considering if…
- you are exploring a traditional Ayurvedic herb and accept weak evidence
Probably skip if…
- you want a benefit demonstrated in human trials
- you are pregnant or breastfeeding
- you expect reliable digestive or anti-inflammatory effects
Evidence at a glance
| Goal | Evidence | Effect | Best fit | Time |
|---|---|---|---|---|
| traditional digestive and anti-inflammatory use | Mixed Evidence | Unknown in humans | not established | Uncertain |
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
traditional digestive and anti-inflammatory use
Mechanism onlyCyperus rotundus has a long traditional record for digestive and inflammatory complaints, and laboratory and animal studies report anti-inflammatory, antioxidant, and antispasmodic activity. There are essentially no rigorous human trials to confirm clinical benefit. Any claimed effects rest on preclinical mechanisms rather than demonstrated outcomes.
Bottom line: Nut grass shows anti-inflammatory and antispasmodic activity in lab and animal studies, but human benefit is unproven.
Evidence is mixed
Support is limited to preclinical data and tradition; controlled human trials are lacking.
How to take it
- Typical dose
- preparation-dependent; follow the product label, starting low
- Timing
- as directed
- With food
- with food to reduce stomach upset
- How long to try
- short trial only, given the limited safety data
What to track
- any digestive symptom change
- tolerability
Safety
Common side effects
stomach upset (limited data)
Who should avoid it
- pregnant or breastfeeding people
- people with known sedge allergy
Pregnancy & breastfeeding
Insufficient safety data and traditional use for menstrual stimulation; avoid in pregnancy.
Choosing a product
Look for
- identifies Cyperus rotundus and the rhizome part
- states extract strength
- third-party tested for heavy metals and contaminants
Be skeptical of
- treats specific diseases
- proven anti-inflammatory cure
- weight-loss claims
References by claim
Track Nut Grass with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.