Step 1 : Introduction to the question "6. I belong to the onion family Allium, though I am not an onion. I have been used for centuries by mankind for cooking and for medical treatments. I'm said to frighten away vampires as well. What am I?"
...1. Garlic 2. Ginger 3. Tomatoes 4. Leeks Garlic is used to give various foods a bite - and a smell which lingers on the breath for hours afterwards. Medicinally throughout time, garlic has been used in the treatment of breathing problems, in the treatment of tuberculosis and dropsy, as an energy booster, to treat smallpox, and as an aid for poor digestion. Today, it is said to help with heart disease, cholesterol problems, blood pressure problems, and even cancer. Garlic is quite a fascinating little gift from mother nature in fact, but for some people, it does present a small problem with the tail end of the human anatomy. Head for the hills if so! (Question and information supplied by scorpion1960)