Irritable Bowel Syndrome (IBS) Nutritionists and Dietitians in Middle Island, NY

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Photo of Molly Ostrander - Molly Ostrander | Women's Gut & Hormone Health, Nutritionist/Dietitian, MS, RDN LDN, IFNCP
Molly Ostrander | Women's Gut & Hormone Health
Nutritionist/Dietitian, MS, RDN LDN, IFNCP
Online Only
IBS patterns shift.
I practice integrative, functional nutrition focused on identifying root causes. We assess digestion, hormones, stress, and the big picture of your health history to understand what’s driving your symptoms. You’ll follow a structured plan with clear priorities, optional lab testing, and practical support. Care is available 1:1 or in small groups.
IBS patterns shift.
I practice integrative, functional nutrition focused on identifying root causes. We assess digestion, hormones, stress, and the big picture of your health history to understand what’s driving your symptoms. You’ll follow a structured plan with clear priorities, optional lab testing, and practical support. Care is available 1:1 or in small groups.
(718) 550-3694 View (718) 550-3694
Photo of Marina Bedrossian, Nutritionist/Dietitian, RDN, CDN, CLT, FMN
Marina Bedrossian
Nutritionist/Dietitian, RDN, CDN, CLT, FMN
Online Only
I help women escape the IBS trap using foundational cellular healing - not restrictive diets.
If you're exhausted from trying every diet, supplement, and protocol without lasting relief - and you're ready to finally understand what your body is trying to tell you - you've found the right place.
I help women escape the IBS trap using foundational cellular healing - not restrictive diets.
If you're exhausted from trying every diet, supplement, and protocol without lasting relief - and you're ready to finally understand what your body is trying to tell you - you've found the right place.
(631) 816-2287 View (631) 816-2287
Photo of Deborah A. Williams, Nutritionist/Dietitian, RD, CDN
Deborah A. Williams
Nutritionist/Dietitian, RD, CDN
Online Only
As a Registered Dietitian (RD, CDN), I help clients move beyond diets, confusion, and quick fixes into a sustainable, empowered relationship with food and body. My approach blends evidence-based nutrition with holistic practices rooted in neuroscience, mindset, and embodiment. Together, we uncover patterns that keep you stuck, calm the inner voice of doubt, and build trust in your body’s signals. Clients often arrive frustrated or disconnected; I guide them toward food freedom, body acceptance, and a clear, confident path to lasting wellness.
As a Registered Dietitian (RD, CDN), I help clients move beyond diets, confusion, and quick fixes into a sustainable, empowered relationship with food and body. My approach blends evidence-based nutrition with holistic practices rooted in neuroscience, mindset, and embodiment. Together, we uncover patterns that keep you stuck, calm the inner voice of doubt, and build trust in your body’s signals. Clients often arrive frustrated or disconnected; I guide them toward food freedom, body acceptance, and a clear, confident path to lasting wellness.
(631) 502-7972 View (631) 502-7972
Photo of Sara Ryba Matty, Nutritionist/Dietitian, RD, CDN
Sara Ryba Matty
Nutritionist/Dietitian, RD, CDN
1 Endorsed
Hicksville, NY 11801
My ideal client is an individual that wants to partner with me to set goals and accomplish them together! Whether you want eat healthier, lose weight, tackle a medical issue or a combination of all of them, my job is to put my client at ease and guide them to success. I value the relationships and bonds that are create between me and my clients. Food is a very intimate, cultural, personal issue; and in many ways ends up encompassing almost areas of lives. I thrive off of the trust that my clients and I build together and our ultimate victories, both large and small.
My ideal client is an individual that wants to partner with me to set goals and accomplish them together! Whether you want eat healthier, lose weight, tackle a medical issue or a combination of all of them, my job is to put my client at ease and guide them to success. I value the relationships and bonds that are create between me and my clients. Food is a very intimate, cultural, personal issue; and in many ways ends up encompassing almost areas of lives. I thrive off of the trust that my clients and I build together and our ultimate victories, both large and small.
(516) 588-7297 View (516) 588-7297
Photo of Ann Silver, Nutritionist/Dietitian, MS, RDN, CDCES, CDN
Ann Silver
Nutritionist/Dietitian, MS, RDN, CDCES, CDN
Serves Area
Meeting with Ann Silver to address your nutritional issues and goals involves allowing Ann a window into your life. Changing one's eating style or food choices is not only about selecting different foods but looking at all aspects of your life that impacts your eating. The questions that need to be explored are why do you eat, when do you eat, where do you eat, how do you eat, what do you eat and how much do you eat.
Meeting with Ann Silver to address your nutritional issues and goals involves allowing Ann a window into your life. Changing one's eating style or food choices is not only about selecting different foods but looking at all aspects of your life that impacts your eating. The questions that need to be explored are why do you eat, when do you eat, where do you eat, how do you eat, what do you eat and how much do you eat.
(631) 284-4815 View (631) 284-4815
Photo of Dan Wernikoff - Champion Athletes Sports Nutrition, Nutritionist/Dietitian, MICP, CSN
Champion Athletes Sports Nutrition
Nutritionist/Dietitian, MICP, CSN
Serves Area
Champion Athletes Sports Nutrition programs are some of the most successful programs in the country. Clients from all over the country have been coming to our offices or using our online program to help them achieve their goals. We offer a holistic and fully customized approach taking into consideration our clients food preferences, training habits, sport, position, body composition and level of physical and mental development.. Every one of our clients receives a personal evaluation and 24/7 support and coaching. Unlike most practices which cater to adult clients.
Champion Athletes Sports Nutrition programs are some of the most successful programs in the country. Clients from all over the country have been coming to our offices or using our online program to help them achieve their goals. We offer a holistic and fully customized approach taking into consideration our clients food preferences, training habits, sport, position, body composition and level of physical and mental development.. Every one of our clients receives a personal evaluation and 24/7 support and coaching. Unlike most practices which cater to adult clients.
(855) 705-4735 View (855) 705-4735
Photo of Cristina Rivera - Nutrition in Motion, P.C., Nutritionist/Dietitian, MS, RD, CSSD, CDN, CEDS-C
Nutrition in Motion, P.C.
Nutritionist/Dietitian, MS, RD, CSSD, CDN, CEDS-C
Online Only
The Registered Dietitians at Nutrition in Motion, P.C. share a philosophy of using food to fuel, nourish and strengthen one's body. We treat each patient as an individual in order to collaboratively create a plan to reach the individual's goals. We believe in the use of behavior modification in conjunction with nutrition counseling, rather than attempting to follow an unsustainable diet. This helps clients make more attainable and enduring lifestyle changes. All foods can have a place as a part of a healthy lifestyle, and we are here to help you make them fit.
The Registered Dietitians at Nutrition in Motion, P.C. share a philosophy of using food to fuel, nourish and strengthen one's body. We treat each patient as an individual in order to collaboratively create a plan to reach the individual's goals. We believe in the use of behavior modification in conjunction with nutrition counseling, rather than attempting to follow an unsustainable diet. This helps clients make more attainable and enduring lifestyle changes. All foods can have a place as a part of a healthy lifestyle, and we are here to help you make them fit.
(631) 528-2139 View (631) 528-2139
Photo of Stacy Seslowsky - Heal From Food , Nutritionist/Dietitian, RD, LDN, MS
Heal From Food
Nutritionist/Dietitian, RD, LDN, MS
Serves Area
I know what it feels like to be frustrated & sad about your physical condition. One pill after another is not the answer. Through 20 years of education and experience in nutrition and functional medicine, I have learned how to find the root cause of imbalance and work together with patients using an online platform to transform and restore good health. Health & weight issues are most often related to gut, hormone, or immune imbalance. A uniquely designed food and lifestyle modification plan can & will change your health status. Do not lose hope. My process works for even the most challenging of cases.- Stacy Seslowsky, RD, LDN, MS
I know what it feels like to be frustrated & sad about your physical condition. One pill after another is not the answer. Through 20 years of education and experience in nutrition and functional medicine, I have learned how to find the root cause of imbalance and work together with patients using an online platform to transform and restore good health. Health & weight issues are most often related to gut, hormone, or immune imbalance. A uniquely designed food and lifestyle modification plan can & will change your health status. Do not lose hope. My process works for even the most challenging of cases.- Stacy Seslowsky, RD, LDN, MS
(904) 899-4955 View (904) 899-4955
Photo of Shana Maleeff - FoodandFitnessPro, LLC, Nutritionist/Dietitian, MA, RD, CDN
FoodandFitnessPro, LLC
Nutritionist/Dietitian, MA, RD, CDN
1 Endorsed
Hicksville, NY 11801
I specialize in weight loss and transformation, helping people to boost their metabolism, increase energy, improve sleep, increase confidence, and look and feel better. I also have 16+ years of experience working with diabetes, prediabetes, PCOS, high cholesterol, high blood pressure, fitness/sports nutrition, GI disorders, and more. I individualize meal plans and programs to fit your lifestyle and preferences and get you the results you are looking for. I use tools like metabolic testing and body fat testing to gain further insights into your unique physiology to individualize your program and goals.
I specialize in weight loss and transformation, helping people to boost their metabolism, increase energy, improve sleep, increase confidence, and look and feel better. I also have 16+ years of experience working with diabetes, prediabetes, PCOS, high cholesterol, high blood pressure, fitness/sports nutrition, GI disorders, and more. I individualize meal plans and programs to fit your lifestyle and preferences and get you the results you are looking for. I use tools like metabolic testing and body fat testing to gain further insights into your unique physiology to individualize your program and goals.
(516) 441-9013 View (516) 441-9013
Photo of Shoshana Pritzker - Nutrition by Shoshana, Nutritionist/Dietitian, RD, CDN, CSSD, CISSN
Nutrition by Shoshana
Nutritionist/Dietitian, RD, CDN, CSSD, CISSN
Online Only
My ideal client is someone who is ready to take control of their nutrition and lifestyle. A positive attitude and belief in your own abilities to make lasting lifestyle changes is the key to success in any areas of your life, including diet and nutrition. If you're someone who is excited about learning new things, then I'm the right Dietitian for you.
My ideal client is someone who is ready to take control of their nutrition and lifestyle. A positive attitude and belief in your own abilities to make lasting lifestyle changes is the key to success in any areas of your life, including diet and nutrition. If you're someone who is excited about learning new things, then I'm the right Dietitian for you.
(321) 351-3058 View (321) 351-3058
Photo of Barbara Ann Grova, Nutritionist/Dietitian, INHC, AADP
Barbara Ann Grova
Nutritionist/Dietitian, INHC, AADP
East Setauket, NY 11733
I have over 20 years experience in womens hormonal health, weight loss, anxiety and nutrition. I am a 9 year Breast Cancer survivor, treating my stage 2 holistically. I help Survivors recover and prevent reoccurrence. Together we uncover the root cause of your health condition. I will give you a nutrition and lifestyle protocol so your body can heal naturally without medication. I teach you my life’s challenges coping skills. My clients lose an average of 12-15 lbs on my on-line program. I love and support you through every step, holding your hand until you’re ready to flourish on your own! I am very caring, dedicated, compassionate
I have over 20 years experience in womens hormonal health, weight loss, anxiety and nutrition. I am a 9 year Breast Cancer survivor, treating my stage 2 holistically. I help Survivors recover and prevent reoccurrence. Together we uncover the root cause of your health condition. I will give you a nutrition and lifestyle protocol so your body can heal naturally without medication. I teach you my life’s challenges coping skills. My clients lose an average of 12-15 lbs on my on-line program. I love and support you through every step, holding your hand until you’re ready to flourish on your own! I am very caring, dedicated, compassionate
(516) 530-7955 View (516) 530-7955
Photo of Lori Barrett, Nutritionist/Dietitian, RDN, LD
Lori Barrett
Nutritionist/Dietitian, RDN, LD
Old Bethpage, NY 11804
Let’s get you started with a plan that is custom-made just for you. I have helped hundreds of clients, both children and adults reach their goals, and I make sure every client of mine gets the same personalized treatment to succeed. I want to help you feel your best, and perform your best: in your sport, in school, at work, or at play.
Let’s get you started with a plan that is custom-made just for you. I have helped hundreds of clients, both children and adults reach their goals, and I make sure every client of mine gets the same personalized treatment to succeed. I want to help you feel your best, and perform your best: in your sport, in school, at work, or at play.
(407) 399-0895 View (407) 399-0895
Photo of Madeline Basler - Real You Nutrition, Nutritionist/Dietitian, MS, RDN, CDN
Real You Nutrition
Nutritionist/Dietitian, MS, RDN, CDN
Serves Area
If you have been recently diagnosed with a health condition such as IBS, diabetes, or suffer from infertility, fatigue, have brain fog or unexplained weight fluctuations, and your doctor is not helping you, we can help figure it out together!
Real You Nutrition is a nutritional counseling practice that specializes in intuitive eating, eating disorders, chronic illness, and women’s health. We offer a non-diet treatment plan that helps people establish healthy eating patterns that align with their values. We believe by nurturing your physical, mental and emotional well-being, you can become the best REAL version of yourself, reduce your risk of chronic disease, have more energy, and feel good about yourself. We offer extensive gastrointestinal dysfunction and hormonal testing to get to the root causes and personalize and customize a protocol to address these needs.
If you have been recently diagnosed with a health condition such as IBS, diabetes, or suffer from infertility, fatigue, have brain fog or unexplained weight fluctuations, and your doctor is not helping you, we can help figure it out together!
Real You Nutrition is a nutritional counseling practice that specializes in intuitive eating, eating disorders, chronic illness, and women’s health. We offer a non-diet treatment plan that helps people establish healthy eating patterns that align with their values. We believe by nurturing your physical, mental and emotional well-being, you can become the best REAL version of yourself, reduce your risk of chronic disease, have more energy, and feel good about yourself. We offer extensive gastrointestinal dysfunction and hormonal testing to get to the root causes and personalize and customize a protocol to address these needs.
(516) 784-4052 View (516) 784-4052
Photo of Renee M Barbis - R.M.B. Health~Rejuvenating Mind & Body, Nutritionist/Dietitian, CHHC, AADP
R.M.B. Health~Rejuvenating Mind & Body
Nutritionist/Dietitian, CHHC, AADP
East Setauket, NY 11733
I offer an anti-inflammatory detox program in order to jump start weight loss, clear up asthma, arthritis, digestive disorders ( IBS), skin conditions, and overall well being.
I primarily work with women from the ages of 21-45 who are struggling with depression, anxiety, fertility issues, life issues, and unhappiness. While working together we are able to find an individualized plan that will suit your needs. We will use foods, handouts, cooking demonstrations, goals, and other healing techniques to assist you in becoming the person you always dreamed you could be!
I offer an anti-inflammatory detox program in order to jump start weight loss, clear up asthma, arthritis, digestive disorders ( IBS), skin conditions, and overall well being.
I primarily work with women from the ages of 21-45 who are struggling with depression, anxiety, fertility issues, life issues, and unhappiness. While working together we are able to find an individualized plan that will suit your needs. We will use foods, handouts, cooking demonstrations, goals, and other healing techniques to assist you in becoming the person you always dreamed you could be!
(631) 240-0721 View (631) 240-0721
Photo of Jillian Mergruen, Nutritionist/Dietitian, RD, CDN
Jillian Mergruen
Nutritionist/Dietitian, RD, CDN
3 Endorsed
Online Only
If you are struggling with your relationship with food, movement or your body, we might be a good fit to work together! I am a registered dietitian based in New York City who specializes in disordered eating and eating disorder treatment as well as other nutrition-related issues, like diabetes and GI nutrition. If you often feel pre-occupied with food or your body, struggle with feeling chaotic or in control around food, or if it feels hard to feel confident in your food choices, we can do this work together! I am here to support you in finding peace with food and your body. My goal is to help you do sustainable work with support!
If you are struggling with your relationship with food, movement or your body, we might be a good fit to work together! I am a registered dietitian based in New York City who specializes in disordered eating and eating disorder treatment as well as other nutrition-related issues, like diabetes and GI nutrition. If you often feel pre-occupied with food or your body, struggle with feeling chaotic or in control around food, or if it feels hard to feel confident in your food choices, we can do this work together! I am here to support you in finding peace with food and your body. My goal is to help you do sustainable work with support!
(516) 604-3316 View (516) 604-3316
Photo of Jacqueline Iannone - The Rite Bite Nutrition Counseling, PLLC, Nutritionist/Dietitian, MS, RDN, CDN
The Rite Bite Nutrition Counseling, PLLC
Nutritionist/Dietitian, MS, RDN, CDN
Miller Place, NY 11764
Struggling with your health or feeling stuck? Most of our patients pay nothing out of pocket—insurance often covers visits in full with no copay. Maybe you’ve tried countless diets, or maybe your goal isn’t even weight loss—you just want to better manage diabetes, support heart health, ease digestion, or feel more energized. At The Rite Bite Nutrition Counseling, our team of award winning Registered Dietitian Nutritionists takes a different approach. We don’t do fad diets or one-size-fits-all plans. Instead, we offer evidence-based, personalized care that works with your lifestyle and goals.
Struggling with your health or feeling stuck? Most of our patients pay nothing out of pocket—insurance often covers visits in full with no copay. Maybe you’ve tried countless diets, or maybe your goal isn’t even weight loss—you just want to better manage diabetes, support heart health, ease digestion, or feel more energized. At The Rite Bite Nutrition Counseling, our team of award winning Registered Dietitian Nutritionists takes a different approach. We don’t do fad diets or one-size-fits-all plans. Instead, we offer evidence-based, personalized care that works with your lifestyle and goals.
(631) 869-4069 View (631) 869-4069
Photo of Lisa Stollman, Nutritionist/Dietitian, MA, RDN, CDCES, CDN, CLT
Lisa Stollman
Nutritionist/Dietitian, MA, RDN, CDCES, CDN, CLT
1 Endorsed
Serves Area
Welcome! I’m a registered dietitian nutritionist (RDN) specializing in weight management, diabetes, inflammation, and gastrointestinal health. I work with individuals who are ready to feel better in their bodies, gain clarity around food choices, and build habits that actually last. My approach is warm, realistic, and science-based—no restrictive diets or shame-based strategies here. Whether you're dealing with a recent diagnosis, chronic symptoms, or simply want to eat in a way that supports your lifestyle, I’m here to help you. Are you ready feel great and enjoy better health? Call me at 631/364-0366 to schedule an appointment.
Welcome! I’m a registered dietitian nutritionist (RDN) specializing in weight management, diabetes, inflammation, and gastrointestinal health. I work with individuals who are ready to feel better in their bodies, gain clarity around food choices, and build habits that actually last. My approach is warm, realistic, and science-based—no restrictive diets or shame-based strategies here. Whether you're dealing with a recent diagnosis, chronic symptoms, or simply want to eat in a way that supports your lifestyle, I’m here to help you. Are you ready feel great and enjoy better health? Call me at 631/364-0366 to schedule an appointment.
(631) 364-0366 View (631) 364-0366
Photo of Jennifer Clemente, Nutritionist/Dietitian, MS, CNS, CDN, IFMCP
Jennifer Clemente
Nutritionist/Dietitian, MS, CNS, CDN, IFMCP
Online Only
My philosophy centers on one simple, powerful truth: the gut is the foundation of health. You’re not alone if you feel trapped by symptoms yet routine labs were normal. Or you’ve been given medication, acid blockers, antidepressants or vague advice like “try eating better” without anyone asking why you have symptoms in the first place. I’ve been there too and I know a better way. My approach focuses on finding the root cause of your health concerns through deeper testing to answer key questions: What’s driving the inflammation? Is the gut lining compromised? Is the microbiome balanced? Is the body absorbing nutrients properly?
My philosophy centers on one simple, powerful truth: the gut is the foundation of health. You’re not alone if you feel trapped by symptoms yet routine labs were normal. Or you’ve been given medication, acid blockers, antidepressants or vague advice like “try eating better” without anyone asking why you have symptoms in the first place. I’ve been there too and I know a better way. My approach focuses on finding the root cause of your health concerns through deeper testing to answer key questions: What’s driving the inflammation? Is the gut lining compromised? Is the microbiome balanced? Is the body absorbing nutrients properly?
(646) 679-7940 View (646) 679-7940
Photo of Jessica Jaeger, Nutritionist/Dietitian, MS, RD, LD
Jessica Jaeger
Nutritionist/Dietitian, MS, RD, LD
2 Endorsed
Online Only
Are you ready to find joy in food again? Jessica helps clients struggling with food, exercise, and weight. If food preoccupies your thoughts, she can help. Jessica combines her expertise in disordered eating research with practical, real-life experience to guide her clients toward recovery.
Are you ready to find joy in food again? Jessica helps clients struggling with food, exercise, and weight. If food preoccupies your thoughts, she can help. Jessica combines her expertise in disordered eating research with practical, real-life experience to guide her clients toward recovery.
(516) 703-4921 View (516) 703-4921

Online Dietitians and Nutritionists

Photo of Dr. Danielle Heard, Nutritionist/Dietitian, DCN, MS, CNS, LN, CKNS
Dr. Danielle Heard
Nutritionist/Dietitian, DCN, MS, CNS, LN, CKNS
New York, NY 10018
Dr. Heard is a Licensed and Board Certified Doctor of Clinical & Functional Nutrition, and Certified Nutrition Specialist. She coaches women who want to improve their health and wellness. Dr. Heard has many years of experience working with people who have a wide range of health conditions. She primarily works with women ages 18+.
Dr. Heard is a Licensed and Board Certified Doctor of Clinical & Functional Nutrition, and Certified Nutrition Specialist. She coaches women who want to improve their health and wellness. Dr. Heard has many years of experience working with people who have a wide range of health conditions. She primarily works with women ages 18+.
(212) 535-3160 View (212) 535-3160
Irritable Bowel Syndrome (IBS) Nutritionists and Dietitians
What is Irritable Bowel Syndrome (IBS)?
Irritable bowel syndrome (IBS) is a general term that refers to a collection of symptoms associated with poor gut mobility and function, including abdominal pain, bloating, gas, and diarrhea. IBS is very common, with some estimates suggesting that as many as 10-15% of adults within the United States have IBS. Although the two conditions sound similar and share many symptoms, such as abdominal pain and diarrhea, IBS differs from irritable bowel diseases (IBDs), such as ulcerative colitis and Crohn's disease. In contrast to IBS which is caused by issues in the functioning of the colon, IBDs are inflammatory conditions caused by overactive immune cells within the intestine. IBDs are much less common than IBS and typically more medically severe, occasionally requiring intensive medical treatment and/or surgery. IBS, in contrast, can usually be managed effectively with lifestyle changes and less intense medical intervention.

What are the subcategories of IBS?
Medical professionals generally identify four main types of IBS: IBS-C (constipation-predominant subtype), IBS-D (diarrhea-predominant subtype), IBS-M (mixed bowel subtype), and IBS-U (undefined subtype). Identifying the predominant type of IBS an individual has can be important for determining the type of treatment that is best for them, such as the lifestyle and dietary changes that may be most appropriate, as well as any medications that may be necessary. However, individuals may also experience multiple subtypes over time, as well as experience cycles of flare-ups and symptom relief.

What causes IBS?
The causes of IBS are not well understood, but symptoms are generally attributed to issues with gut muscle contraction and changes in the gut microbiome, both of which can lead to the characteristic symptoms of IBS. These issues can be caused by a variety of lifestyle factors, such as diet and stress. While lifestyle modifications may not completely cure IBS symptoms, identifying symptom-triggering foods, consuming a balanced diet, and reducing stress have all been shown to greatly reduce symptoms. IBS can also be caused by bacterial or parasitic infections within the intestine, in which case the syndrome is referred to as "post-infectious IBS." In contrast to non-infectious IBS, post-infectious IBS is less chronic in nature and symptoms will often resolve once the infection has subsided.

What foods should I avoid if I have IBS?
Specific foods that may trigger symptoms of IBS can vary person-to-person. However, common foods that may exacerbate symptoms include high-fat foods (such as fatty meats), wheat, dairy products, highly acidic foods (such as citrus), beans, cabbage, milk, and carbonated drinks. Over time, individuals with IBS are often able to identify which foods cause their symptoms to worsen and learn to avoid such foods to manage their symptoms.