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Holly Hudson, MS, RDN, CDN

I am a Registered Dietitian Nutritionist certified to work in the state of New York. I have experience with a full range of nutrition-related medical conditions, including type 2 diabetes, eating disorders, weight management, heart disease, and kidney disorders, and I have worked with patients undergoing cancer treatment and with cancer survivors.

Recommended Resources

General Nutrition Information

Harvard's School of Public Health has an excellent nutrition page and a Healthy Eating Plate that is a better alternative to the USDA's MyPlate


The Joslin Diabetes Center does research into diabetes and provides resources for patients. Here is an excellent guide to carbohydrate counting.


The American Institute for Cancer Research supports research into prevention and survivorship, and provides evidence-based resources for dietitians and their patients. Their blog has excellent recipes.

AICR's parent organization is the World Cancer Research Fund International, and they have a Dutch site: Wereld Kanker Onderzoek Fonds.

Supplements and Herbs

Memorial Sloan Kettering Cancer Center has a comprehensive and well-researched guide to herbs and supplements called About Herbs. The information is also available in their mobile app.

Since supplements are unregulated it's good to seek out reports from independent testing labs before taking them. ConsumerLab.com is one that works a bit like Consumer Reports. You pay an annual fee and get access to all of their reports on tests for contamination, absorption, and whether or not the supplement actually contains the active ingredient on the label.

For Dietitians

For continuing education credits that are not provided by the junk food industry, check out this list of conflict-free CEU's maintained by Dietitians for Professional Integrity.

What is the difference between a nutritionist and a Registered Dietitian?

The word "nutritionist" is an unregulated term, so anyone can call themselves a nutritionist regardless of qualifications. Registered Dietitians, on the other hand, must complete an accredited science-based college level curriculum consisting of pre-med classes and in-depth courses in nutrition and food science resulting in a bachelors or masters degree. Registered Dietitians must further complete at least nine months of supervised practice and pass a nationally administered exam. In order to maintain their credentials RDs are required to complete 75 hours of continuing education every 5 years. Registered Dietitians are the nutrition professionals who work in hospitals and medical clinics, and to whom physicians and therapists refer their patients.

The Registered Dietitian credential may be indicated by RD or RDN (Registered Dietitian Nutritionist). These terms are interchangeable. CDN stands for Certified Dietitian Nutritionist, and is a further certification required for practicing in some states such as New York. Other states use the credential LD, or Licensed Dietitian.