Researchers believe a substance called isothiocyanate in the broccoli activates some genes that fight cancer and switching off others that cause it to spread.
All cruciferous vegetables such as broccoli, cauliflower, cabbage and Brussels sprouts contain natural chemicals that can enhance DNA repair which could stop them becoming cancerous. They contain several compounds that improve the liver detox function which will help get rid of cancer causing toxins.
Researchers at John Hopkins University have discovered that fresh broccoli sprouts contain as much protection as the vegetable itself. Broccoli however is a powerhouse of nutrition. It is full of beta-carotene, vitamins B1 and C, the minerals calcium, sulfur and potassium and an excellent source of fiber and is 45% protein.
 
Organic vegetables are best. Here is a recipe you could try:

60ml (2 fl oz) of carrot juice
60ml (2 fl oz) of apple juice
60ml (2 fl oz) of beetroot juice
60ml (2 fl oz) of broccoli juice
½ – 1 tsp chopped fresh parsley
A squeeze of fresh lemon juice.]
 
Green juices and smoothies are loaded with vitamins, amino acids, chlorophyll and mineral such as iron and calcium. Vegetables and their juices are a great way to keep your body alkaline and flooded with oxygen. Cancer cannot thrive in these conditions