A teaspoon a day may keep cholesterol away. A popular spice used to flavor curry dishes like paneer is packed with health-boosting nutrients that can lower cholesterol and protect the immune system. And new research out of Japan finds that the flavorful seeds also show potential for fighting fat. Nigella sativa, better known as black cumin , is rich in bioactive compounds and has been used for centuries to treat illnesses like asthma, high blood pressure, inflammation, coughs, headaches and