Educational information, not medical advice — ask your doctor or midwife.
Alpinia nigra is a tall plant in the ginger family. It grows in wet, shady ground in Northeast India, Bangladesh and parts of Southeast Asia. In Assam and Tripura it is called tara and eaten as a vegetable.
The parts used are the thick underground stem (rhizome) and the young shoots. Cooks boil, ferment or fry them, often with fish. Village healers also used the rhizome for stomach trouble and for worms.
Here is the honest verdict up front. Published human trials of Alpinia nigra are close to none.
Most of what is written about it comes from test tube and animal work. Long food use shows the plant is familiar to many people. It is not proof that it treats anything, and it is not proof that strong extracts are safe.
That point about tradition applies to the whole page. We will not repeat it in every section below.
No one has shown how Alpinia nigra acts in the human body. What follows is lab and animal work only.
In test tube studies, rhizome extracts have slowed or killed intestinal flukes, a type of parasitic worm. Whether that happens inside a human gut is not known.
In lab tests the extracts also mop up free radicals, which are unstable particles linked to cell damage. Many plant foods do this in a dish. It does not mean the same thing happens in you.
In rats, some extracts lowered blood sugar and eased signs of gut irritation. Rat doses and human doses are not the same thing. These results point to questions worth studying, not to a treatment.
There is also no good data on how much of the plant's chemistry your body takes in from a meal.
Most people meet Alpinia nigra as food, not as a pill.
- Fresh rhizome and young shoots, cooked or fermented - Dried rhizome, sliced or ground to powder - Home-made water decoctions used in folk practice - Water or alcohol extracts, mainly made for research
Packaged supplements are rare outside the region. When they exist, the label often does not say how much plant material is in each dose. There is no agreed strength or extract ratio for this plant.
Alpinia nigra has a long place in the food and folk medicine of Northeast India and Bangladesh.
Written records and field surveys describe the rhizome being used for stomach pain, poor appetite and gut worms. Some communities applied crushed plant material to skin sores. Others used it in fermented fish dishes eaten through the year.
It also appears in lists of medicinal plants of Asia for its supposed cooling and digestive effects. These accounts describe what people did. They do not record how well it worked or what harm it caused.
Stop and speak to a doctor or pharmacist if you get a rash, itching, swelling of the lips or face, repeated vomiting, or severe stomach pain.
Get urgent help for trouble breathing or throat swelling. That can be a serious allergic reaction.
See a doctor rather than self-treating if you think you have worms, if you have blood in your stool, if you are losing weight without trying, or if stomach symptoms last more than two weeks.
If you take diabetes medicine and feel shaky, sweaty or confused, check your blood sugar and seek help.
No medicines agency has approved Alpinia nigra as a treatment for anything. In India and Bangladesh it is an ordinary food plant sold in local markets. In the US it would fall under dietary supplement rules, and in the UK and EU it is not an authorised herbal medicine.
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.
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