Kidney Stones
Kidney Stones is a renal health condition. The evidence discussed around it spans different goals: reducing recurrence, relieving pain, and preventing calcium oxalate and uric acid stones.
A focused look at Kidney Stones within renal health.
This list shows research findings, not treatments. Nothing here replaces medical care. If you have this condition, talk to a doctor.
What may help
None of these options has good evidence yet. Best evidence first.
1 option:1 not enough evidence
TENS / EMS TherapypracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
Pooled analyses whose designs were not recorded reported pain reduction with TENS versus sham in two randomized trials involving people with kidney stones.
Open the TENS / EMS Therapy page
May not suit people with this condition
Supplements and practices linked to problems for people with this condition.
ChagasupplementUnclear
High oxalate content increases the risk of calcium oxalate stone formation; contraindicated in those with a history of kidney stones.
Open the Chaga page
The expert view shows every study, dose protocol and source.
What may help
Interventions recorded as helping with this condition1 listedThe best we have, but the evidence is still weak
- →PracticesTENS / EMS TherapyCertaintyLowSourceClinical
Pooled analyses whose designs were not recorded reported pain reduction with TENS versus sham in two randomized trials involving people with kidney stones.
Who was studied
- People with a condition
- Kidney Stones
- Migraine
Open TENS / EMS TherapyStudy result
Two RCTs (Gulacti, Mora) showed significant pain reduction with TENS vs sham
What to avoid
Interventions recorded as making it worse1 listedHighest probability
- →SupplementsChagaCertaintyLowSourceReference knowledge
High oxalate content increases the risk of calcium oxalate stone formation; contraindicated in those with a history of kidney stones.
How to read the evidence
Evidence tier — overall strength of the evidence for the whole compound
- StrongWell established — backed by strong, consistent human research.
- ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
- PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
- LimitedVery limited evidence — treat this as a hypothesis, not proof.
- InsufficientNot enough good evidence to draw conclusions yet.
Certainty — how sure we can be that the effect is real
- Very highVery sure — strong, consistent evidence
- HighFairly sure — consistent evidence from good studies
- MediumModerately sure — new studies could change this
- LowNot sure — little or mixed evidence
- Very lowVery unsure — almost no usable evidence
Source — where the data comes from
- Meta-analysisPooled analysis of many trials — the strongest evidence
- RCTRandomized controlled trial — a strong human study design
- ClinicalA human clinical study
- Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
- Animal researchStudied in animals, not humans
- Community reportsAggregated user reports — anecdotal signal, not evidence
- TheoreticalMechanism-based reasoning, not yet tested
Study grade — quality of each underlying study (A best, D weakest)
- AHigh-quality — strong, consistent human trials
- BGood — solid evidence with some limitations
- CModerate — limited, small, or mixed-quality studies
- DWeak — preliminary, indirect, or animal-only
Confidence — how strongly the sources back a finding
A 0–100 score from study quality and agreement
Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.
Full write-up
What is it
Kidney Stones is a renal health condition. The evidence discussed around it spans different goals: reducing recurrence, relieving pain, and preventing calcium oxalate and uric acid stones. These goals are not interchangeable, so findings about pain relief should not be read as evidence that the condition itself has been prevented.
Evidence-backed options
The options associated with Kidney Stones address different goals rather than offering interchangeable effects. Drink Enough Water is linked with lower recurrence when fluid intake is enforced, making it a prevention-focused approach. Potassium citrate is used to alkalinize urine and help prevent calcium oxalate and uric acid kidney stones, although the information provided does not establish how quickly this effect appears or how long treatment was used. TENS / EMS Therapy is associated with reduced pain compared with sham treatment, so its role is symptom-focused rather than recurrence prevention.
Dose, treatment duration, and time to effect are not specified for these options, and should not be inferred. The findings also come from different types of evidence and address different outcomes, so a result for pain should not be interpreted as evidence of fewer future stones, or vice versa. Suitability can depend on the type of stone and a person’s clinical circumstances; consultation with a clinician is appropriate for Kidney Stones.
What to avoid
The concern across these items is their relationship with oxalate, a substance associated with calcium oxalate stone formation in susceptible individuals. Beetroot Extract, Cranberry Extract, Curcumin, and Green Tea Extract (EGCG) contain oxalates, which may increase urinary oxalate excretion and could raise the risk of calcium oxalate stones. Green Tea Extract (EGCG) is specifically flagged because green tea is high in oxalates, while Beetroot Extract is also high in oxalates.
Vitamin C is metabolized to oxalate, and high doses can increase urinary oxalate excretion, particularly concerning for people with a history of stones. Collagen is rich in hydroxyproline, which is metabolized partly to oxalate; concentrated or high-dose intake may raise urinary oxalate. For people with recurrent calcium-oxalate stones, collagen may warrant avoidance or clinical supervision. Anyone with a medical condition such as kidney stones can discuss these considerations with a clinician, especially when stone type, recurrence, or supplement dose is relevant.