Hodgkin Lymphoma

Unfortunately there is not a definitive answer for this question, but the general belief is that the best way to help prevent cancer is to exercise and eat a low calorie diet containing fiber, fruits, and vegetables.

As well, it is recommended to avoid environmental risks such as tobacco use, alcohol consumption, sun exposure, as well as air and water pollution.

Here is an excellent general article on cancer prevention.
http://www.cancerquest.org/introduction-cancer-prevention

I will research further environmental risks and post later. This is a very complex topic. While there is no food that can guarantee a relapse, there are foods that are healthier then others. A change in your diet can give you the proper nutrients to build a strong immune system.

Fresh raw vegetable juice, which is made from a juicer and not bottled, is an excellent source of vitamins and nutrients. Carrots. celery, beets, fennel, cucumber, parsley and broccoli are all recommended. (Carrots have a high Glycemic rating so do not drink more then a pint a day.) Fruit juice is not a good idea to add in unless it is an apple, as fruits are too high in sugar.

Avocados are an excellent source of fat in the diet (which we all need). All of the foods that are toted as bad for you are: fast food, cakes, cookies, processed foods, etc so have those items as treats only.

Here are a few articles about healthy diets. Take from them what you feel comfortable with:

http://www.regenerativenutrition.com/dietaryguidelines.asp
http://crazysexydiet.com/