Cheilocostus speciosus, commonly known as Crepe Ginger and called තෙඹු (Thembu) in Sinhala, is a tall, rhizomatous herb native to tropical Asia and widely found across Sri Lanka. With its broad, spirally arranged leaves and distinctive white, crepe-textured flowers, it is as recognisable in the forest understorey as it is in home gardens. Beyond its ornamental appeal, the plant has a long and well-documented role in Ayurvedic and traditional medicine, where its leaves, roots, and rhizomes are all considered therapeutically useful.
What is Cheilocostus speciosus?
Cheilocostus speciosus belongs to the family Costaceae and was formerly classified under the genus Costus, which is why it is still widely referred to as Costus speciosus in older texts and common usage. The plant grows to around one to three metres in height, producing large, oblong leaves that spiral around a cane-like stem. Its flowers appear in a dense terminal spike, each white bloom with a yellow centre and a delicately crinkled texture that earns the plant its common English name.
In Sri Lanka the plant grows naturally in moist lowland and mid-elevation zones, and it is cultivated in home gardens specifically for medicinal use. In Ayurveda it is known as Keukand or Kushtha, and classical texts cite it as one of the herbs with broad therapeutic application.
What are the traditional and Ayurvedic uses of Crepe Ginger?
Ayurvedic practitioners have used preparations from Cheilocostus speciosus for centuries. The bitter decoction made from the leaves and rhizomes is considered to have antiseptic, astringent, and mild laxative properties. Different parts of the plant are used in different ways depending on the condition being treated.
- Leaves: consumed as a decoction, a fresh juice, or incorporated into a simple preparation such as a sambol or salad.
- Rhizome and roots: boiled or ground into a paste; the juice is used both internally and as a topical application.
- Steroidal compounds: the rhizome contains diosgenin and other steroidal sapogenins that are of ongoing interest in phytochemical research.
How does Crepe Ginger help with blood sugar management?
One of the most widely recognised traditional uses of Crepe Ginger in Sri Lanka is in the dietary management of diabetes. The leaves have a significant dietary fibre content, and fibre is known to slow the absorption of glucose in the digestive tract, helping to moderate post-meal blood sugar spikes. In rural Sri Lankan households it is not uncommon for people managing diabetes to consume Crepe Ginger leaves as a sambol or a lightly prepared side dish.
It is important to note that while Crepe Ginger is a well-regarded complementary food in traditional practice, it should not replace prescribed medical treatment. Anyone managing diabetes should consult a qualified healthcare provider before making changes to their diet or treatment plan.
What digestive benefits does Cheilocostus speciosus offer?
The high fibre content of the leaves also makes the plant a traditional remedy for digestive complaints. In Ayurvedic practice, Crepe Ginger leaf preparations are recommended for relieving constipation by adding bulk to the stool and supporting regular intestinal movement. The plant is also considered beneficial for gastritis: its mildly alkaline properties are thought to help neutralise excess stomach acid, providing relief from the burning discomfort associated with acidity.
Consuming a small quantity of freshly prepared leaves — either as a juice diluted with water or as a cooked dish — is the most common approach in domestic use. Overuse, however, is generally discouraged in traditional guidelines.
Does Crepe Ginger have anti-inflammatory properties?
The roots and rhizome of Cheilocostus speciosus are used in traditional medicine as a cooling agent. A preparation of the root juice is traditionally taken to reduce internal heat and inflammation, particularly conditions associated with burning sensations or fever. In Ayurvedic terms, the plant is considered to have a cooling (sheeta) potency, making it applicable in conditions caused by excess pitta (heat) in the body.
Phytochemical studies have identified compounds in the plant — including alkaloids, saponins, and flavonoids — that may contribute to anti-inflammatory activity, though clinical research in humans remains limited and ongoing.
What antioxidant properties does Crepe Ginger have?
The leaves and roots of Cheilocostus speciosus contain antioxidant compounds, including flavonoids and phenolic acids, which help neutralise free radicals in the body. In traditional use, consuming the plant is associated with detoxification — supporting the body's natural ability to eliminate metabolic waste. The fibre in the leaves plays a supporting role here as well, by promoting efficient elimination through the digestive tract.
Is Crepe Ginger safe to eat and are there any precautions?
When consumed in amounts typical of culinary or traditional medicinal use, Crepe Ginger is generally considered safe for healthy adults. However, the rhizome contains steroidal compounds that are pharmacologically active, and consuming large quantities — especially of the raw rhizome — is not advisable without guidance from a qualified practitioner.
- Pregnant women should avoid therapeutic doses, as the plant is considered a uterine stimulant in high quantities under some Ayurvedic classifications.
- People taking medication for diabetes or blood pressure should seek medical advice before adding Crepe Ginger regularly to their diet, given its potential to affect these conditions.
- Leaves used in food preparation should be sourced from plants grown without pesticide application, as the broad leaves can retain surface residues.
Where can you find Cheilocostus speciosus in Sri Lanka?
Cheilocostus speciosus grows naturally in the island's wet and intermediate zones, often along stream banks, in secondary forest margins, and beneath larger tree canopies where moisture is consistent. It is also cultivated in home gardens across the island, particularly in villages in the Western, Sabaragamuwa, and Central provinces. Visitors to Sri Lanka's traditional herb gardens — including those associated with Ayurvedic resorts and wellness centres in the hill country — are likely to encounter it alongside other medicinal plants in curated collections.
The plant is also found in traditional weda gedara (indigenous physician's household) gardens, where it forms part of a broader pharmacopoeia of locally grown herbs used in consultations.