Educational information, not medical advice — ask your doctor or midwife.
Grama is a home tea made from Bermuda grass, Cynodon dactylon. It is a tough, creeping grass found across the warm parts of the Americas. In Latin American home medicine, the whole plant and its roots were boiled into a drink for the urinary tract.
The drink was treated as a "cooling" or flushing tea. People took it for burning urine, for gravel and stones, and for puffiness. Some healers also used a cooled brew as a wash for skin sores.
Human evidence is very thin. Nearly all the research sits in test tubes and animals, not people. Long traditional use is not proof that grama works, and it is not proof that it is safe.
Nobody has shown how grama acts inside the human body. The old idea was simple. The tea was thought to make you pass more water and rinse the bladder.
In rodent studies, water extracts of the grass raised urine output. That fits the traditional picture, but rodents are not people. No trial has measured urine output in humans after grama tea.
In test tubes, extracts show antioxidant activity and slow some bacteria. Whether that happens in a urinary tract after you drink a cup is not established.
Animal work has also reported lower blood sugar and lower blood pressure with extracts. These are early findings in animals only. They matter mainly as a warning about drug interactions, not as a proven benefit.
The grass is rich in potassium salts. A tea high in potassium can nudge fluid and salt balance, which may explain part of the folk reputation. This is a plausible idea, not a tested one.
Dried, chopped stems, leaves and roots for tea are the common form. Market stalls across Latin America sell it loose by weight.
Tea bags are sold too. Grama often appears in blended "kidney" or "flushing" teas with corn silk or horsetail.
Liquid extracts and tinctures exist, mostly online. Capsules of dried powder are sold in some shops.
Fresh juice from the crushed plant is a home preparation in some regions. Ayurvedic shops sell the same species as durva, which can make labels confusing.
Quality control is weak across all of these forms. Products are rarely tested for identity or purity.
Lawn clippings are not a source. Garden and roadside grass may carry weedkiller, pesticide or animal waste.
Grama has a long place in Latin American home medicine. Healers in Mexico, Central America and the Caribbean boiled the plant as an agua de uso, a drink taken through the day.
It was given for scant or burning urine, for gravel and stones, and for "heat" in the body. Some traditions used it after fevers to "clean the blood".
European herbals used a close relative, couch grass, in much the same way. Spanish colonial writing likely blended the two plants and their reputations.
The same species appears in Ayurveda as durva, used there for bleeding and skin complaints. These uses are recorded in old texts. They were never tested the way a medicine is tested today.
Stop and get urgent help if your lips, tongue or throat swell, or you wheeze or struggle to breathe. That can be a severe allergic reaction.
See a doctor the same day if you have fever, chills, back or side pain, or blood in your urine. Also see a doctor if you cannot pass urine at all.
Stop and book an appointment if burning urine lasts more than two days. Also stop if you feel dizzy, very dry, or oddly weak.
In the United States grama is sold as a dietary supplement or herbal tea, and the FDA has not approved it to treat anything. In the UK and EU it is sold as a food or herbal tea, not as a licensed medicine. In much of Latin America it is sold openly in markets with no testing.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
One email with the summary. We'll also send a short weekly evidence update — unsubscribe any time.
