Conclusion
For better protection against cancer, you should lose weight, quit smoking, limit alcohol content and exposure to toxins. Support this by eating fruits and vegetables that are rich in carotenes and polyphenols. Add healthy fiber for additional protection. Avoid processed meat and eat less red meat.
You can take these cancer-fighting chemicals as a dietary supplement, but your body will absorb them best when consumed fresh and raw or slightly steamed. The best way to fight cancer is to eat a rainbow of vegetables and fruits every day. The more varied, the more important the nutrients you get with every bite.