I read somewhere that Noni juice thins the blood. Therefore it is better to avoid Noni juice before an operation. Other than that, I have not heard anything good about noni juice, except from the people who sells it. I have heard of many kinds of anti-cancer food, which I am taking on a regular basis : garlic, onions, broccoli, cabbage, carrot, flax seeds, soy products, lots of fruits and vegetables. Take care, Jo