Leeks are a member of the all-powerful Allium family - Garlic, onions, chives - and though not as rich in the anti-carcinogenic chemicals, they too are important in the detoxification process. They’re also antibacterial and as such contribute to protection against stomach cancer, destroying some of the bacteria in the gut which change harmless nitrates into cancer causing nitrites.
Leeks are useful in treating and preventing disorders of the Immune System, Heart and Circulation, Bones, joints and muscles, the Respiration System and the Urinary System. They are powerful diuretics and have strong anti-bacterial properties.
Good for all chest problems, sore throats and voice problems, reducing high blood pressure and cholesterol, cancer protection, gout and arthritis.
Leeks contain the enzyme allinase which is released when you slice the bulb. The action of allinase on sulphur compounds in the flesh results in the chemicals which not only give leeks their flavour, but also make you cry.
Nutrients
The Emperor Nero ate leeks every day to improve his singing voice.