516-466-4279• Email Nancy
NYS Certified Dietitian-Nutritionist (CDN), Registered Dietitian Nutritionist (RDN), MS, CNS • Long Island, Queens, New York & Online
  • AboutAbout Nancy Nancy Mazarin is a Registered Dietitian (RD) and Certified Nutritional Specialist (CNS) with a Master’s Degree in Nutrition from Columbia University. She is also a Certified Dietitian Nutritionist (CDN) in the State of New York. Nancy’s career path has always been in the science field, starting as a researcher at the Albert Einstein College of Medicine. Her love of science, combined with her interest in nutrition, eventually led her to pursue her Master’s Degree. In her endeavors, Nancy has worked as a medical nutrition consultant for hospitals and physicians, taught college-level courses and reviewed scholarly nutrition education articles. Nancy has worked with hundreds of patients, helping them to understand the ever-changing science of nutrition and create programs that are tailored to their own health goals. Included in these individualized plans are education, meal planning and behavior modification. As a food and nutrition expert, Nancy translates the science of nutrition into practical everyday solutions. DEGREES B.A. with a major in biology M.S. in nutrition from Columbia University R.D. from the American Dietetic Association CNS: Certified Nutrition Specialist (American College of Nutrition) CDN: Certified Dietitian Nutritionist (New York State certification) MEMBERSHIPS American Dietetic Association Diabetes Care and Education practice group…
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  • Medical Nutrition TherapyMedical Nutrition Therapy Food is the fuel for your body and the cornerstone of your health. When you face medical issues that challenge your well-being, proper nutrition can be a powerful tool to restore your health. Medical Nutrition Therapy is an essential part of your comprehensive health care, enabling you to optimize health and well being. Patients with medical issues are usually referred to Nancy by physicians or hospitals. Nancy works with your doctor using an integrative approach to understand your medical needs. She translates research into practice and develops an intervention plan. At the initial consultation, Nancy evaluates your medical history, diet, habits, and lifestyle to determine when, where and how to modify your nutrition plan to achieve lifelong health. Your customized eating program will include: • Nutrition Education • A personalized meal plan that incorporates simplicity and flexibility • recommendations for specific foods and patterns of food choices to match your unique health needs Some of the medical issues Nancy has addressed through Medical Nutrition Therapy include: GASTROINTESTINAL DISORDERS: Crohn’s and Colitis; Irritable Nowel Syndrome; Diarrhea or Constipation; Celiac Disease/Gluten Sensitivity; GERD/Heartburn; Diverticular disease CARDIOVASCULAR/HEART HEALTH: Cholesterol; Triglycerides; Hypertension; Congestive Heart Failure ENDOCRINOLOGY: Diabetes Mellitus; Pre Diabetes; Hypoglycemia; Fatty…
    • Diabetes & Endocrine Issues
    • Cardiovascular/Heart Health
    • Fatty Liver Disease
    • Food Allergy – Sensitivity – Intolerance
    • Gastrointestinal/Digestive Disorders
    • SIBO & IBO
    • Renal Disease
    • Binge Eating
    • Geriatrics
  • Weight ManagementWeight Management Therapy Reaching and maintaining a healthy weight is a challenge for many people. One-size-fits-all programs are unrealistic, rarely result in weight maintenance and can be detrimental to good health. Success comes from sustained changes in eating that become incorporated into your daily routine. Your initial consultation with Nancy will allow her to: Assess your dietary needs and current eating practices. Understand your home, work and social environment. Identify what areas need improvement and where good choices and habits already exist. You will work together to develop a personalized plan with specific foods and patterns of food choices. You will be given the tools to promote positive behavior changes. *You do not need to eating special foods to lose weight *You do not need to be restrictive and deprived to lose weight *You do not need to be perfect to lose weight *You do not need to eat differently from your family or friends to lose weight Healthier food choices, blended with behavior changes and sound nutrition information will guide you to your optimal weight and health. Your action plan will: Set realistic and sustainable goals Analyze your dietary needs Get to the root of your food issues Provide…
    • Weight Gain
    • Weight Loss
  • Specialty Diets
    • Anti Inflammatory Diet
    • Dairy Free – Lactose Intolerance
    • Elimination Diet
    • FODMAP
    • Celiac / Gluten Free Diet
    • Plant Based Plans
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  • Homecontact info is 935 Northern Boulevard; Suite 301; Great Neck, NY 11021 516-466-9087 nmeatrite@mazarinrd.com Contact Info-On every page This will be on every page in a sidebar Nancy Mazarin, MS, RD, CDN Medical Nutrition Consultant like this on each page as a side bar   Sidebar widget: Nancy Mazarin is a Nutritional Consultant with a private practice in Great Neck, NY. With more than thirty years experience, Nancy employs practical nutritional tools to create long-term solutions. With her help, you can build a personalized program to improve your health, enhance your quality of life, achieve optimal weight goals, and address medical issues. • Are you struggling with weight issues? • Do you have a history of weight cycling? • Have you been diagnosed with medical conditions such as Diabetes, Cardiovascular disease, Hypertension, Reflux or Irritable Bowel Syndrome? • Has your energy and quality of life diminished? • Are you ready to feel better and become the best YOU? Nancy Mazarin is a Nutrition Consultant with a private practice in Great Neck, NY. She has practical every day solutions from over 30 years of working with doctors, patients and a full spectrum of medical conditions. She can help you (in bold): Pinpoint…
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Vector dementia infographic in outline style.
Blog, Health & Nutrition, Healthcare Professionals

DEMENTIA PREVENTION SHOULD START AT MIDLIFE. The time to start is in your 40’s. 

The link between brain health and nutrition is irrefutable. As a Long Island dietitian, I have spent my career working to help patients improve their wellness through individualized dietary interventions, and this includes providing evidence-based…
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May 15, 2024
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kidney disease graphic
Blog, Diabetes and Endocrine Issues

Can a Nutritionist Help with Kidney Disease?

What do diabetes and kidney disease have in common? Diet – they are both improved with the identical nutrition plan.  How do you keep your kidneys healthy when you have diabetes? If you manage your blood sugar you reduce the likelihood…
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May 1, 2024
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Vitamins pill, organic vegetables and fruit, illustration
Blog, Health & Nutrition

What is Food as Medicine?

Food as Medicine is based upon the recognition that food and diet play important roles in disease prevention and management. The fact that diet can impact an individual’s health is now well documented and accepted by healthcare providers…
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April 15, 2024
https://mazarinrd.com/wp-content/uploads/2024/04/FoodAsMedicine-1.jpg 793 1322 Jen Rolston https://mazarinrd.com/wp-content/uploads/2025/03/NancyMazarin-2-1030x281.png Jen Rolston2024-04-15 16:53:112024-04-19 16:57:47What is Food as Medicine?
colorful graphic about good health
Blog, Holistic Nutritionist

Holistic Nutritionist New York: What is a holistic nutritionist? Do you need one?

There is a growing number of people searching for holistic nutritionists, and there are many holistic nutrition practices.  What is important to understand is that “holistic nutritionist” is not a credentialed title. Anyone can call themselves…
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April 1, 2024
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its all about gut health graphic
Blog, Gastrointestinal - Digestive Disorders

How to Improve Digestive Health

As I discussed and explained in previous blogs, there is a microscopic world that lives in your large intestine called the gut microbiome.  It is made up of trillions of microorganisms.  Though most are bacteria, there also are fungi and…
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March 15, 2024
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digestion process
Blog, Gastrointestinal - Digestive Disorders

What is the Importance of Digestive Health? A Long Island Certified Dietitian Nutritionist Discusses Gut Health

Everybody is talking about “gut health”. There are whole sections of bookstores now dedicated to books on digestive health; aisles of grocery stores and products pushing digestive health antidotes, remedies, fixes, and more. Once you understand…
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March 1, 2024
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is glycemic index important
Blog, Diabetes and Endocrine Issues

IS THE GLYCEMIC INDEX IMPORTANT IN 2024? Or is it Outdated?

To understand my answer, I need to explain the glycemic index, fiber, and processing: What is the glycemic index? By definition, the glycemic index is a measure of the blood glucose raising potential of the carbohydrate content of a food…
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February 15, 2024
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graphic of why gut health matters
Blog, Gastrointestinal - Digestive Disorders

LEARN WHAT TO EAT TO HAVE A HEALTHY MICROBIOME

Why Gut Health Matters As a registered dietitian nutritionist, I have worked with innumerable individuals over the years who struggle with digestive/gastrointestinal problems (gut health) such as Irritable Bowel Syndrome, Inflammatory Bowel…
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February 1, 2024
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Nutritionist and client discussing balanced nutrition plan
Blog, Weight Loss

Can a Dietitian Help You Lose Weight? What should you expect? Should you see a dietitian or a nutritionist?

In the New Year, it’s not uncommon to want to get healthier and lose those extra pounds. In fact, weight loss is a top resolution. How do you lose weight? Weight loss can be made very complicated, but this is unnecessary and counterproductive.…
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January 15, 2024
https://mazarinrd.com/wp-content/uploads/2024/01/Jan-15-2024-1.jpg 667 1000 Nancy Mazarin https://mazarinrd.com/wp-content/uploads/2025/03/NancyMazarin-2-1030x281.png Nancy Mazarin2024-01-15 18:07:202024-05-28 15:36:43Can a Dietitian Help You Lose Weight? What should you expect? Should you see a dietitian or a nutritionist?
nutritionist dietician talking to a client
Blog, Healthcare Professionals

What is the difference between a dietitian and a nutritionist?

With so many nutrition professions, it can be difficult to understand how they differ. This is especially the case for nutritionists and dietitians. The terms dietitian and nutritionist may sound similar, but there are significant distinctions: …
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January 1, 2024
https://mazarinrd.com/wp-content/uploads/2024/01/Jan1-2024.jpg 667 1000 Nancy Mazarin https://mazarinrd.com/wp-content/uploads/2025/03/NancyMazarin-2-1030x281.png Nancy Mazarin2024-01-01 15:03:072024-01-04 16:57:09What is the difference between a dietitian and a nutritionist?
diagram explaining leaky gut syndrome
Blog, Gastrointestinal - Digestive Disorders

WHAT IS LEAKY GUT?
 The link between diet and leaky gut syndrome explained by an RDN

Before you can understand leaky gut, you need to know the construction of the small intestines and their function. The small intestine is about 25 feet long, the longest segment of the gastrointestinal tract.  It is responsible for breaking…
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December 15, 2023
https://mazarinrd.com/wp-content/uploads/2023/12/Dec-15_2023_LeakyGut-1.jpg 600 1000 Nancy Mazarin https://mazarinrd.com/wp-content/uploads/2025/03/NancyMazarin-2-1030x281.png Nancy Mazarin2023-12-15 10:47:022024-05-28 15:37:32WHAT IS LEAKY GUT?
 The link between diet and leaky gut syndrome explained by an RDN
healthy eating during holidays
Blog, Health & Nutrition, Weight Maintenance

8 Healthy Eating Tips for the Holidays – Maintain a Healthy Weight, Feel Energized, Keep Your Immune System Strong

Though the holiday season has started, there’s no need to leave your healthy eating behind. Celebrate the season with family, friends, and tasty food. Reduce your chances of gaining those holiday pounds. Set realistic expectations, aim for…
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December 1, 2023
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    Weight Loss Medication Q & A with Long Island Dietitian Nutritionist As a dietitian nutritionist with over 30 years of experience working with patients on Long Island and throughout New York, I closely follow the latest medical advancements and evidence-based research. One of the most common topics I’m asked about is weight loss medication—their effectiveness, […]

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  • Difference Between a Dietitian and Nutritionist
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Nancy Mazarin - Certified Nutritionist & Registered Dietitian MS, RDN, CDN, CNS
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Amy Pedolsky
17:02 26 Dec 22
Over the past six months that I have been seeing Nacny, she has been very helpful in hepling me lose 31 pounds. She understands very aspect of what I needed and how to accommidate them properly. With Nancy's help I have been able to change my lifestyle, eat healthier and change and treat my medical conditions very differently and for the best. I would highly reccommanded Nancy to anyone that has tried diets before and has not succeded and who has a lot of different medical conditions that make it difficult to know what to eat and what not to eat.
Michael Maino
21:11 17 Dec 22
I was hesitant at first to start seeing a nutritionist. I was very comfortable with my poor eating habits despite being upset about my weight; however I knew I needed to make a change.Nancy was very understanding from the start. Before meeting with Nancy, I had been in a constant cycle of over-restricting myself to lose weight rapidly, followed by binge eating and gaining it all back plus some more.Over the past year and a half, Nancy has helped me discover normal eating. She helped me understand my hunger and my fullness in addition to helping me choose better food options.Nancy is very dedicated to working with you and helping you achieve your goals. She doesn’t just help you reach your goals — she helps you change your perspective of food and eating for the better. What you learn with Nancy is not temporary — you will carry it with you and practice it throughout your life.I have lost almost 70 pounds since first meeting with Nancy and continuing on my journey. I highly recommend working with her.Nancy, thank you for all of your help!
Carol Vogt
21:38 12 Dec 22
Although I was unlucky when I developed some health issues, I was very lucky to find Nancy Mazarin, a skilled, intelligent, caring nutritionist. I saw lots of doctors but she was the one who came up with the diagnosis that finally led to my improved health. She was always available when I had questions and was even willing to meet with me one weekend when I was struggling.
Bonnie Eisler
00:22 03 Dec 22
Nancy has been wonderful to work with. She is extremely knowledgeable about nutrition, and very intuitive in identifying and removing roadblocks her clients may be experiencing on their way to achieving their goals. Nancy is extremely organized and promptly keeps her appointments. I highly recommend her!
richard markx
02:55 11 Oct 22
Absolutely knowledgeable compassionate and very personable!Anyone wishing to improve their health through nutrition and education will find Nancy Mazarin incredibly helpful Thank you for all your help Nancy!
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  • Celiac Disease/Gluten Free Diets
  • SIBO
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  • FODMAP Diets
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© Copyright | All Rights Reserved. | Nancy Mazarin NYS Certified Dietitian Nutritionist (CDN) & Registered Dietitian Nutritionist (RDN) on Long Island, Queens, New York & Online
11 Glenwood Drive Great Neck, NY 11021 United States - 516-466-4279
Works with patients from: Nassau County, Great Neck, Suffolk County, Queens, North Shore, Locust Valley, Port Washington, Glen Cove, Oyster Bay, Cold Spring Harbor, Huntington, Manhasset, Brookville, Syosset, Woodbury, Roslyn, Hicksville, East Hills, Long Island
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