TUMERIC. Truly one of the marvelous medicinal spices of the world. Its main active ingredient is curcumin which gives turmeric its intense cadmium yellow color. Curcumin, studies show, is an anti-inflammatory agent on a par with cortisone, and has reduced inflammation in animals and symptoms of rheumatoid arthritis in humans. In other tests, it lowered cholesterol, hindered platelet aggregation (blood clotting), protected the liver from toxins, boosted stomach defenses against acid, lowered blood sugar in diabetics, and was a powerful antagonist of numerous cancer-causing agents. Anti-cancer activity.
 More Health Benefits of Turmeric
Molecular Nutritional and Food Research, March 2008, reports that corticosteroids have been one of the major modes of therapy against various chronic respiratory diseases such as asthma and chronic obstructive pulmonary disease (COPD). However, these corticosteroids have failed to be effective against these disease conditions because they don't reduce the effects of oxidation.
Researchers reported that naturally occurring polyphenols in curcumin (found in turmeric) offer a safer alternative treatment. Curcumin can directly scavenge free radicals such as superoxide anion and nitric oxide, and modulate important signaling pathways. These polyphenols also down-regulate expression of pro-inflammatory mediators, and up-regulate desirable gene expression in the lungs. Researchers concluded that curcumin is a potential therapeutic agent against chronic lung diseases.
 A Growers' Guide
Can turmeric be home grown in UK?