Get Ready for a Healthier Life!

Nancy Mazarin
Registered Dietitian Nutritionist (RDN) & NYS Certified Dietitian Nutritionist (CDN)
Long Island, Queens, New York & Online

Nancy Mazarin - Certified Nutritionist & Registered Dietitian – Long Island, Queens NY & Online

Nancy Mazarin is a nutrition consultant with a private practice in Great Neck, New York. She is a New York State-certified dietitian nutritionist and registered dietitian nutritionist with a master’s degree from Columbia University. Her focus is on health, wellness, and sustainable lifestyle choices. With thirty years of experience, Nancy employs practical nutritional tools to create long-term solutions while working closely with health professionals and patients on a full spectrum of medical conditions and nutritional needs.

Nancy works with individuals from Nassau County, Suffolk County, North Shore Long Island, South Shore Long Island, Queens, statewide, and nationally, providing virtual nutrition consultations.

Learn more about Nancy»

Your Health is Important

Food provides the fuel for your body and the nutrients for your health. Nancy provides personalized nutrition counseling which is rooted in the concept that one size never fits all. Her diet and lifestyle recommendations focus on optimizing health and disease prevention.

When you face medical issues such as diabetes, irritable bowel syndrome, conditions that challenge your physical and mental well-being or energy levels, diet is often the cornerstone of treatment, and proper nutrition is a powerful tool to restore your health. Patients with medical conditions and their associated symptoms are often referred to Nancy by physicians and health care professionals in the Long Island, Queens and Greater New York. Nancy works with your doctor using an integrative approach to understand your nutritional and medical needs. She translates research into practice and develops your individualized intervention program.

spoon and fork - 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
healthy food in 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

Consultation with Nancy

Working with a certified nutritionist and registered dietitian is an essential part of your comprehensive health care, enabling you to optimize health and well-being. During your initial nutrition consultation, Nancy will evaluate your current eating practices, as well as your home, work and social environment, and identify which areas need improvement and where good choices and habits already exist. Nancy‘s expertise will provide:

  • Nutrition Education
  • A personalized meal plan that incorporates simplicity, flexibility and sustainability
  • Recommendations for specific foods and pattern of food choices as well as behavior changes to match your unique health needs

Get in Touch

Nancy Mazarin

Registered Dietitian Nutritionist (RDN) & NYS Certified Dietitian Nutritionist (CDN)
Long Island, Queens, New York & Online

FAQs

Dietitians, like Nancy, are professionals who must complete rigorous education and certification requirements. They are the only qualified experts to provide medical nutrition therapy (MNT). Dietitians possess the critical skills to analyze medical records, lab results, and dietary assessments, applying evidence-based practices to develop effective nutrition strategies. Nutritionists, on the other hand, may not require any formal education or certification, depending on their region.

When you work with Nancy, you’re getting more than a meal plan — you’re investing in personalized, science-based support tailored to your health, goals, and lifestyle. RDNs are the only licensed professionals qualified to provide medical nutrition therapy for conditions such as:

  • Diabetes
  • High blood pressure
  • Digestive disorders (IBS, Crohn’s, Leaky Gut)
  • Heart and cardiovascular disease
  • Metabolic syndrome, fatty liver, and obesity

Choose a NYC-certified nutritionist or registered dietitian with credentials from one of these boards: the Certification Board for Nutrition Specialists (CNS) or the Clinical Nutrition Certification Board (CCN). Both require a master’s degree in nutrition (or a related field) and supervised practical experience before certification.

“Holistic nutrition” is a practical approach to healthy living that considers the whole person — physical, emotional, and mental well-being. As a dietitian, Nancy practices holistic nutrition, focusing on education: understanding where food comes from, making healthier choices at the market, reading labels, and recognizing how different foods affect the body — all with an emphasis on balanced, whole-food eating.

If you’ve worked with Nancy, she’d love to hear your feedback. Your review not only helps others find trusted nutrition care but also helps Nancy continue improving and personalizing her services. Thank you for sharing your experience!