Turmeric (Curcuma longa) is revered around the world as "the spice of life" and it is frequently used in a wide range of products including perfume, cosmetics, dyes and essential oils. Thai, Indian and Persian cuisines use turmeric for colour and flavour, especially in curries. India is the main exporter of turmeric and although there are approximately 70 varieties of Curcuma longa found around the world, Madras turmeric and Allepey turmeric are the most well-known. Ayurvedic and Chinese medicines use curcumin, the active ingredient in turmeric, to alleviate arthritis, depression, diabetes, stomach ailments and inflammation. Studies are finding that turmeric may even prevent certain types of cancer.
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Common turmeric varieties
The most commonly produced turmeric, Curcuma longa, is referred to simply as turmeric or Indian saffron. The U.S. and Britain regularly import Madras turmeric to spice curries, pickles, mustard and other foodstuffs. Madras turmeric is grown in the Tamil Nadu region of India and it is bright yellow in colour.
Another popular variety is Alleppey turmeric, also called Alleppey Finger turmeric; this variety comes from the Kerala region of India and it is preferred by cooks because the powdered form has a flavour that is most similar to fresh turmeric. The Alleppey root is dark in colour due to high concentrations of curcumin.
Lesser known varieties
Lesser known varieties of turmeric are produced in different regions of India and are frequently named for the location where they are grown, such as Erode, Salem, Suvarna, Sudarshana, Suguna, Rajapore, Sangli, Nizamabad, Local Haldi, China-scented, Thodopuza, and Red-streaked turmeric varieties.
There are six carcuma species related to turmeric (Curcuma longa): mango ginger (Curcuma amada), narrow-leaved turmeric (Curcuma angustifolia), wild turmeric (Curcuma aromatica), Curcuma australasica, and Zedoary (Curcuma zedoaria). Wild turmeric, also known as Cochin turmeric (Curcuma Aromatica), is light yellow in colour and a good source of essential oil. Wild turmeric is frequently used in China for cosmetics and perfumes. Narrow-leaved turmeric, zedoary and black turmeric (Curcuma caesia) all grow in northeast India.
If you are looking for fresh turmeric, try your local international grocery stores or Asian markets. Turmeric root is best when it has a clean and unwrinkled appearance; like ginger, turmeric root looks shrivelled as it loses freshness.
Purchase high-quality powdered turmeric for the best flavour and replace it often as the spice can get bitter and lose its flavour over time.
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