Ela (Cardamom): Benefits, Evidence, Dosage & Safety

TL;DR

Cardamom (Ela, Elettaria cardamomum) is a food spice with small human trials behind it. A 10-week double-blind RCT (n=83) found 3 g/day lowered HbA1c, insulin, and triglycerides in type 2 diabetes; an uncontrolled 12-week study (n=20) reported blood-pressure drops. A 2023 meta-analysis found only small effects. Trials were short; safety data are limited.

(53 words. Sources: Azimi et al., RCT; Verma et al., blood-pressure study; Izadi et al., 2023 meta-analysis; Kazemi et al., prediabetes RCT.)

What it is

Ela is green (small) cardamom: the dried aromatic fruit of Elettaria cardamomum (L.) Maton, a member of the ginger family (Zingiberaceae) known as the "queen of spices" (Kazemi et al., RCT). It is one of the world's most widely traded spices, used both as food and in traditional medicine (Verma et al., Indian Journal of Biochemistry & Biophysics).

Traditional use

In Ayurveda and Unani practice, cardamom has been used for gastrointestinal disorders, cardiac disorders, renal and vesicular calculi, and as a remedy for debility, anorexia, dyspepsia, asthma, bronchitis, and halitosis (Verma et al.). Cardamom is primarily a culinary spice, and the clinical trials below use concentrated daily powder doses: not the pinch in your chai. These traditional uses are historical practice, not clinical proof.

What modern research says

Blood sugar and metabolic markers (type 2 diabetes)

The strongest human trial is a double-blind, placebo-controlled RCT in 83 overweight/obese adults with type 2 diabetes: 3 g of green cardamom per day for 10 weeks versus a rusk-powder placebo. Compared with control, the cardamom group showed decreases in HbA1c (−0.4%), fasting insulin (−2.8 µIU/dL), HOMA-IR (−1.7), and triglycerides (−39.9 mg/dL), plus increased SIRT1 (+2.3 ng/mL). Total cholesterol, HDL-C, and LDL-C did not change significantly (Azimi et al., Journal of the Science of Food and Agriculture).

Important context: this is one trial in one specific population (adults with type 2 diabetes), and it does not establish cardamom as a treatment for diabetes. It also needs replication: and the trial below argues for caution.

Blood pressure and inflammation (meta-analysis)

A 2023 meta-analysis pooled 8 reports (595 participants) of cardamom supplementation and found a small reduction in diastolic blood pressure (weighted mean difference −0.91 mmHg) and reductions in the inflammatory markers hs-CRP (−1.21 mg/L) and IL-6 (−2.41 ng/L). There was no significant effect on systolic blood pressure. The authors flagged the small number of eligible trials and low total participant count, calling for larger, longer studies (Izadi et al., Phytotherapy Research, PMID 36181264).

A counterweight: the null prediabetes trial

A double-blind, placebo-controlled RCT in 80 overweight/obese pre-diabetic women gave 3 g/day of whole green cardamom (versus rusk-flour placebo) for two months. Overall, cardamom had no significant effect compared with placebo on blood pressure, glycemic indices, or serum lipid values (Kazemi et al., Journal of Dietary Supplements). This directly tempers the positive diabetes trial: at similar doses, cardamom did not outperform placebo in a pre-diabetic population.

Blood pressure (small uncontrolled study)

An earlier single-blind study followed 20 newly diagnosed stage-1 hypertensive adults taking 3 g/day of cardamom powder for 12 weeks, with no placebo or control group. Mean blood pressure fell from 154.2/91.8 to 134.8/79.6 mmHg (P<0.001), fibrinolytic activity increased, and antioxidant status rose by 90% (P<0.05), with no reported side effects and no significant lipid changes (Verma et al.). Without a control arm, the blood-pressure drop cannot be attributed to cardamom with confidence: and the stronger 2023 meta-analysis found no significant systolic effect and only a tiny diastolic one.

What the evidence does not support (yet)

No clinical trials were identified for cardamom and digestion, oral health, respiratory conditions, mood, or cancer. Those remain traditional or speculative claims, not evidence-backed benefits.

Dosage

There is no established recommended dose. Clinical trials used 3 g/day of green cardamom powder for 8–12 weeks: research regimens, not personal recommendations (Azimi et al., Kazemi et al., Verma et al.). Culinary use (the spice in food) is far lower and is not the same as supplement use.

Safety & contraindications

Short-term trial safety was acceptable but thin. In the prediabetes RCT, the cardamom group reported diarrhea (n=2), mild skin inflammation (n=1), and glossitis (n=1); most events were mild and transient (Kazemi et al.). The uncontrolled blood-pressure study reported no side effects over 12 weeks (Verma et al.).

Beyond that, human safety data are limited: no long-term trials, no dedicated safety monograph identified, and no established pregnancy/breastfeeding guidance. Culinary cardamom is a widely consumed food spice; concentrated supplement use should be discussed with a clinician, particularly if you manage diabetes or blood pressure or take related medicines, since cardamom could interact with drug therapy.

FAQs

Does cardamom lower blood pressure?

The evidence is weak. An uncontrolled 12-week study (n=20) reported large blood-pressure drops, but it had no control group (Verma et al.). A 2023 meta-analysis of 595 participants found only a small diastolic reduction (−0.91 mmHg) and no systolic effect (Izadi et al.).

Does cardamom help diabetes?

One double-blind RCT (n=83) found 3 g/day for 10 weeks lowered HbA1c, insulin, HOMA-IR, and triglycerides in adults with type 2 diabetes (Azimi et al.). But a separate placebo-controlled trial in pre-diabetic women found no significant difference from placebo (Kazemi et al.). The evidence is mixed, not proof.

How much cardamom was used in studies?

Trials used 3 g/day of green cardamom powder for 8–12 weeks (Azimi et al., Kazemi et al.). These are research regimens, not recommendations.

Is cardamom safe?

Short-term trial data look acceptable: mild, mostly transient side effects (diarrhea, mild skin inflammation, glossitis) were reported in one trial (Kazemi et al.). Long-term safety data do not exist. Culinary use as a spice is ordinary; supplement-strength use deserves a clinician's input.

Does cardamom help digestion?

Traditionally it has been used for digestive complaints (Verma et al.), but no clinical trials were identified for digestive outcomes. That benefit is unproven.

Sources

Disclaimer

This article is for educational purposes only and is not medical advice. Herbal products can interact with medications and are not suitable for everyone. Talk to a qualified healthcare practitioner before use — especially if you are pregnant, breastfeeding, managing a medical condition, or taking prescription medicines.