Cardamom
Real but limited evidence as a supplement. Meta-analysis of 8 RCTs shows a small reduction in diastolic blood pressure and inflammatory markers (CRP, IL-6) in metabolic-syndrome populations. Long traditional use as a digestive spice with a clean safety record in food-level amounts.
Quick decision guide
May help most
Adults with metabolic syndrome or mild hypertension looking for a complementary dietary spice with modest evidence for inflammation and BP — not a primary treatment.
Common dosing range
Trial doses: 3 g/day cardamom powder (Verma 2009). Capsule supplements: 500–2000 mg/day.
When to expect effects
8–12 weeks for blood pressure and inflammatory marker changes.
Watch out for
Most evidence is from small trials in specific populations (metabolic syndrome). Don't replace BP medication with cardamom.
Evidence snapshot
What is it
Cardamom is a plant-derived ingredient sold as a dietary supplement and used in traditional herbal use. Found on roughly 712 U.S. supplement labels.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
Diastolic blood pressure reduction (in metabolic syndrome / mild HTN) Limited Evidence | DBP −0.91 mmHg (95% CI −1.19 to −0.62) in meta-analysis; larger reductions in small open trials but with weak design | Adults with metabolic syndrome or stage-1 hypertension using it as a dietary adjunct | 8–12 weeks |
Inflammation (hs-CRP and IL-6) Limited Evidence | hs-CRP −1.21 mg/L; IL-6 −2.41 ng/L (meta-analysis) | Adults with metabolic syndrome (elevated baseline CRP) | 8–12 weeks of consistent supplementation |
Digestive comfort (carminative / dyspepsia) Mixed Evidence | Subjective relief reported in traditional and small uncontrolled use; not quantified in controlled trials | Adults with mild post-meal bloating, gas, or nausea who want to try a traditional remedy | Acute (taken with or after meals) |
Diastolic blood pressure reduction (in metabolic syndrome / mild HTN)
- Effect
- DBP −0.91 mmHg (95% CI −1.19 to −0.62) in meta-analysis; larger reductions in small open trials but with weak design
- Best fit
- Adults with metabolic syndrome or stage-1 hypertension using it as a dietary adjunct
- Time
- 8–12 weeks
Inflammation (hs-CRP and IL-6)
- Effect
- hs-CRP −1.21 mg/L; IL-6 −2.41 ng/L (meta-analysis)
- Best fit
- Adults with metabolic syndrome (elevated baseline CRP)
- Time
- 8–12 weeks of consistent supplementation
Digestive comfort (carminative / dyspepsia)
- Effect
- Subjective relief reported in traditional and small uncontrolled use; not quantified in controlled trials
- Best fit
- Adults with mild post-meal bloating, gas, or nausea who want to try a traditional remedy
- Time
- Acute (taken with or after meals)
Evidence for 3 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
Diastolic blood pressure reduction (in metabolic syndrome / mild HTN)
Biomarker supportA 2023 systematic review and meta-analysis (Izadi et al., 8 RCTs, 595 participants) found green cardamom modestly reduced diastolic BP (weighted mean difference −0.91 mmHg) in patients with metabolic syndrome and related disorders. Systolic BP was not significantly affected. A small open-label trial (Verma 2009, n=20) reported larger BP reductions but lacked a placebo control and a blinding protocol. The honest read: real but small effect, mostly seen in metabolically unhealthy populations.
Bottom line: A small but statistically real effect on diastolic BP — clinically meaningful only as one part of a broader BP-lowering effort.
Inflammation (hs-CRP and IL-6)
Biomarker supportThe Izadi 2023 meta-analysis also found significant reductions in high-sensitivity CRP (WMD −1.21 mg/L) and IL-6 (WMD −2.41 ng/L) in metabolic syndrome populations. Cardamom contains 1,8-cineole and other terpenoids with anti-inflammatory mechanisms in vitro. As with the BP data, the effects are statistically real but modest, and trials are heterogeneous.
Bottom line: Statistically significant biomarker improvement; clinical-endpoint benefits (heart events, etc.) not yet demonstrated.
Digestive comfort (carminative / dyspepsia)
Mechanism onlyCardamom has been used in Ayurvedic and traditional Middle Eastern medicine for centuries as a digestive aid — appetite stimulation, post-meal bloating, mild nausea. Mechanistic studies show cardamom essential-oil components affect intestinal motility and gas formation, but modern RCTs in functional dyspepsia or IBS are scarce. The traditional use is widespread and consistent; the evidence quality is preclinical and traditional, not clinical.
Bottom line: Reasonable traditional use; don't expect substitute for evidence-based treatment of functional GI disorders.
How it works
How to take it
What to track
Bottom line: 1.5–3 g/day powder for 8–12 weeks is a reasonable trial. Effects are modest — don't expect to swap it for a real antihypertensive.
5 commercial forms
Compare the main delivery options and what they’re best suited for.
Green cardamom pods, whole
Culinary standardWhole Elettaria cardamomum pods. Crush before use to release essential oils. Used in chai, biryani, baked goods, and many spice blends. Most evidence-friendly form for traditional dietary use.
Essential oil preserved best in whole pods; lasts ~6 months in airtight container.
Cardamom seeds (decorticated)
More convenientThe seeds removed from the pods. Stronger immediate flavor but oxidizes faster than whole pods. Used in tea and as a culinary ingredient.
Faster aroma loss than pods; use within 3 months.
Ground cardamom powder
Trial formThe form used in the Verma 2009 BP trial (3 g/day). Convenient for baking and capsules. Loses potency fastest — buy small quantities and store in dark, airtight container.
Essential oils dissipate within weeks; replace frequently.
Cardamom capsules / extract
SupplementConcentrated cardamom powder or standardized essential-oil extract in capsules. Used at 500–2000 mg/day in supplement protocols. Convenient but loses the food-matrix context of culinary use.
Consistent dose; check for 1,8-cineole standardization on extract products.
Black cardamom (Amomum subulatum)
Not the studied speciesA different species used in some South Asian and Sichuan cuisines for its smoky aroma. Generally regarded as safe culinarily but minimal clinical study — the BP / inflammation data are for green cardamom only.
Distinct phytochemistry from green cardamom; do not substitute for the clinical evidence base.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Serious risks
Gallstone-related: cardamom may stimulate bile flow and could theoretically worsen biliary colic in people with symptomatic gallstones — avoid concentrated supplement doses if you have known gallstones.
Who should avoid it
- People with symptomatic gallstones — discuss with a clinician before using supplement doses.
- People with known cardamom or related Zingiberaceae (ginger family) allergy.
- People taking serious anticoagulants or antiplatelets (warfarin, DOACs, clopidogrel) — cardamom has weak antiplatelet activity in preclinical studies; combined effect not characterized.
Pregnancy & breastfeeding
Culinary use of cardamom (in chai, cooking, baking) is considered safe in pregnancy and breastfeeding. Supplement-level doses (≥1 g/day) have not been studied in pregnancy — avoid concentrated supplement forms during pregnancy and breastfeeding until better data exist.
Bottom line: Very safe as a culinary spice. Supplement doses are reasonably safe short-term in non-pregnant adults but lack long-term data.
Interactions
The small BP-lowering effect from cardamom could theoretically add to antihypertensive drugs. Monitor BP if starting both.
Cardamom has fibrinolytic-enhancing activity in small studies (Verma 2009) and weak in vitro antiplatelet activity. Clinical bleeding risk hasn't been characterized — exercise caution.
Some traditional sources warn cardamom may affect CYP enzymes that metabolize protease inhibitors, but human data are absent. Mention to your HIV specialist if using supplement-level doses.
Food sources
| Food | Amount | %DV |
|---|---|---|
| Cardamom, ground | 1 tsp (~2 g, ~6 kcal) | — |
| Cardamom pods, whole | 1 pod (~0.3 g) | — |
| Indian masala chai (1 cup, brewed with 1 pod) | ~250 mL | — |
| Cardamom-flavored baked goods (e.g., Scandinavian pulla) | 1 serving | — |
Cardamom, ground
- Amount
- 1 tsp (~2 g, ~6 kcal)
- %DV
- —
Cardamom pods, whole
- Amount
- 1 pod (~0.3 g)
- %DV
- —
Indian masala chai (1 cup, brewed with 1 pod)
- Amount
- ~250 mL
- %DV
- —
Cardamom-flavored baked goods (e.g., Scandinavian pulla)
- Amount
- 1 serving
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
What is Cardamom used for?⌄
Cardamom is used traditionally for various supportive purposes. Human evidence for specific health claims is generally limited, so it is best treated as a complementary option rather than a treatment.
Is Cardamom safe?⌄
Cardamom is generally well tolerated at typical doses, but quality varies between products. People who are pregnant, breastfeeding, taking prescription medications, or managing a medical condition should check with a healthcare provider first.
How long does it take to work?⌄
Effects of botanical supplements often take several weeks of consistent use, if they appear at all. Reassess after 8-12 weeks of regular use.
References by claim
Diastolic blood pressure reduction (in metabolic syndrome / mild HTN)
Track Cardamom 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.