Amla, Yashtimadhu, Shatavari and Guduchi are the classical cooling herbs Ayurveda uses for Pitta and acidity. Amla and a liquorice extract each have one small randomized trial with encouraging results; Shatavari and Guduchi rest mainly on classical use. Liquorice in large or long-term doses can raise blood pressure, so ask a doctor if that applies to you.
Why does Ayurveda call these herbs "cooling"?
Every herb is described by its taste (rasa), potency (virya) and post-digestive effect (vipaka). Herbs with a cool potency and a sweet or bitter taste are used when Pitta runs hot, as it does in Amlapitta.
| Herb | Botanical | Part | Classical qualities | Human evidence for acidity |
|---|---|---|---|---|
| Amalaki (Amla) | Phyllanthus emblica | Fruit | Sour taste, cool potency, sweet vipaka; Rasayana | One 4-week RCT, 68 adults (2018) |
| Yashtimadhu (liquorice) | Glycyrrhiza glabra | Root | Sweet, cool, soothing | One 30-day RCT of an extract (2012) |
| Shatavari | Asparagus racemosus | Root | Sweet, bitter, cool, nourishing | Limited |
| Guduchi | Tinospora cordifolia | Stem | Bitter, balances all three doshas; Rasayana | Limited |
What did the Amla trial find?
Karkon Varnosfaderani and colleagues gave 68 adults with reflux symptoms either two 500 mg Amla tablets twice a day after meals or placebo for four weeks. Heartburn and regurgitation fell in both groups, but more with Amla. The trial was small and short, and measured only self-reported symptoms.
What did the liquorice trial find?
Raveendra and colleagues tested a flavonoid-rich liquorice root extract (GutGard), 75 mg twice daily for 30 days, against placebo in people with indigestion. Symptom scores improved more with the extract. The extract was developed by the company that supported the study, which is worth knowing.
What about Shatavari and Guduchi?
Both are classical Pitta-calming herbs with long traditional use and laboratory research, but there are few good human studies on acidity. They are used in formulas, including Acimukta, for their classical qualities.
Are there safety issues?
- Liquorice: studies show that large amounts or long-term use can raise blood pressure, lower potassium and cause fluid retention. Ask a doctor if you have high blood pressure, heart or kidney disease, or take diuretics.
- Guduchi: rare reports have linked Guduchi products to liver problems; people with liver disease should ask a doctor.
- Amla: generally safe as a food; it may add to blood-thinning and diabetes medicines.
- In pregnancy, ask a doctor before taking any herb regularly.
About Acimukta: it contains sugar, so people with diabetes should ask their doctor first. If you take antacids or acid-reducing medicines (such as PPIs), ask your doctor before combining them. Not for children, pregnancy or breastfeeding except under medical supervision. Heartburn lasting more than two weeks needs a doctor.
See a doctor promptly if heartburn comes with: difficulty or pain swallowing, vomiting blood or material like coffee grounds, black or tarry stools, unexplained weight loss, a feeling that food sticks, chest pain on exertion, or symptoms that are new after 55 or last more than two weeks. Chest pain can be the heart, not the stomach. Read heartburn red flags.
