Irritable Bowel Syndrome (IBS) Nutritionists and Dietitians in Longmeadow, MA

Photo of Jacqui Campbell, Nutritionist/Dietitian, MS, RD, CDN, LDN
Jacqui Campbell
Nutritionist/Dietitian, MS, RD, CDN, LDN
Serves Area
My goal with all my clients is to help them form and foster a healthy relationship with food. I do not do diets or quick weight loss. I help people eat to nourish their bodies and minds, overcome fear foods and food rules and eat with freedom. I work with clients of all ages and health concerns. I have several years experience working with eating disorders.
My goal with all my clients is to help them form and foster a healthy relationship with food. I do not do diets or quick weight loss. I help people eat to nourish their bodies and minds, overcome fear foods and food rules and eat with freedom. I work with clients of all ages and health concerns. I have several years experience working with eating disorders.
(860) 200-3742 View (860) 200-3742

More Dietitians and Nutritionists Nearby

Photo of Jennifer Carlson, Nutritionist/Dietitian, MS, RDN, CYT
Jennifer Carlson
Nutritionist/Dietitian, MS, RDN, CYT
Serves Area
Medical nutrition therapy for: Diabetes, High Cholesterol, Irritable Bowel Syndrome & Weight Management.
Jennifer has a master of science degree in food and nutrition, is a Registered Dietitian and a yoga teacher. She provides both in person as well as virtual services. For over 15 years, she has provided nutrition related services to thousands of people in a variety of settings including hospitals, psychiatric facilities, community health centers, schools, cafes, bakeries, restaurants and more. For the past decade, she has provided medical nutrition therapy to clients as a licensed dietitian. In 2021 she opened her private practice, Peace and Power LLC. Learn more at www.peaceful-nutrition.com!
Medical nutrition therapy for: Diabetes, High Cholesterol, Irritable Bowel Syndrome & Weight Management.
Jennifer has a master of science degree in food and nutrition, is a Registered Dietitian and a yoga teacher. She provides both in person as well as virtual services. For over 15 years, she has provided nutrition related services to thousands of people in a variety of settings including hospitals, psychiatric facilities, community health centers, schools, cafes, bakeries, restaurants and more. For the past decade, she has provided medical nutrition therapy to clients as a licensed dietitian. In 2021 she opened her private practice, Peace and Power LLC. Learn more at www.peaceful-nutrition.com!
(774) 484-1477 View (774) 484-1477
Photo of Amber Cross, Nutritionist/Dietitian, RD, LDN, MBA
Amber Cross
Nutritionist/Dietitian, RD, LDN, MBA
Westfield, MA 01085
Or maybe you are dealing with chronic health conditions, such as EoE or IBS and don't know how to eat.
I specialize in helping you achieve sustainable weight management, optimize sports performance, and navigate GI conditions like IBS and EoE. Using evidence-based approaches and my engineering problem-solving background, I create personalized nutrition strategies that work with your body and real life - no restriction or guilt required!
Or maybe you are dealing with chronic health conditions, such as EoE or IBS and don't know how to eat.
I specialize in helping you achieve sustainable weight management, optimize sports performance, and navigate GI conditions like IBS and EoE. Using evidence-based approaches and my engineering problem-solving background, I create personalized nutrition strategies that work with your body and real life - no restriction or guilt required!
(413) 225-4533 View (413) 225-4533
Photo of Lisa Keovongsa - Actualize Counseling & Nutrition, Nutritionist/Dietitian, RDN, LDN
Actualize Counseling & Nutrition
Nutritionist/Dietitian, RDN, LDN
1 Endorsed
Online Only
I work with individuals who are accustomed to high performance but find themselves privately exhausted by a complicated relationship with food and their bodies. If you look capable and successful on the outside while struggling with perfectionism, burnout, or a cycle of restricting and overeating, I understand the weight of that silence. In my work, I provide my clients with a coordinated and compassionate path to recovery. As well as, incorporating strategies for mental health and physical nourishment, helping you move beyond rigid rules to find lasting, evidence-based peace.
I work with individuals who are accustomed to high performance but find themselves privately exhausted by a complicated relationship with food and their bodies. If you look capable and successful on the outside while struggling with perfectionism, burnout, or a cycle of restricting and overeating, I understand the weight of that silence. In my work, I provide my clients with a coordinated and compassionate path to recovery. As well as, incorporating strategies for mental health and physical nourishment, helping you move beyond rigid rules to find lasting, evidence-based peace.
(857) 688-5927 View (857) 688-5927
Photo of Jennifer Belanger - Jen Belanger Nutrition LLC, Nutritionist/Dietitian, MS, RD, LDN
Jen Belanger Nutrition LLC
Nutritionist/Dietitian, MS, RD, LDN
1 Endorsed
Belchertown, MA 01007
Jen Belanger Nutrition is a pediatric consultative services practice specializing in nutrition, feeding therapy, occupational therapy, and lactation consulting. The RDs specialize in pediatric and adolescent nutrition including eating disorders. The OTs offer sensory based therapy for autism, ADHD, sensory processing disorders, and more. Our breastfeeding medicine physician is an IBCLC offering lactation support.
Jen Belanger Nutrition is a pediatric consultative services practice specializing in nutrition, feeding therapy, occupational therapy, and lactation consulting. The RDs specialize in pediatric and adolescent nutrition including eating disorders. The OTs offer sensory based therapy for autism, ADHD, sensory processing disorders, and more. Our breastfeeding medicine physician is an IBCLC offering lactation support.
(413) 327-9745 View (413) 327-9745
Photo of Erica Carneglia - Actualize Counseling & Nutrition, Nutritionist/Dietitian, MS, RDN, LDN
Actualize Counseling & Nutrition
Nutritionist/Dietitian, MS, RDN, LDN
1 Endorsed
Online Only
I help clients navigate eating disorder recovery, disordered eating, body image concerns, and the stress of building a healthier relationship with food. My style is warm, collaborative, and realistic—not about perfection, judgment, or rigid rules. In our first session, I want to understand what you are hoping for, where you have been, and what feels hardest right now. Whether you are actively struggling, stepping down from higher care, worried about relapse, or trying to maintain balanced eating, we move at a pace that feels supportive, clinically appropriate, and sustainable.
I help clients navigate eating disorder recovery, disordered eating, body image concerns, and the stress of building a healthier relationship with food. My style is warm, collaborative, and realistic—not about perfection, judgment, or rigid rules. In our first session, I want to understand what you are hoping for, where you have been, and what feels hardest right now. Whether you are actively struggling, stepping down from higher care, worried about relapse, or trying to maintain balanced eating, we move at a pace that feels supportive, clinically appropriate, and sustainable.
(508) 374-9602 View (508) 374-9602
Photo of Stacy Garvey - Wellpoint Health Solutions, Nutritionist/Dietitian, MSHS, RD, LDN, CDN
Wellpoint Health Solutions
Nutritionist/Dietitian, MSHS, RD, LDN, CDN
Wilbraham, MA 01095
We are a group of Dietitians and Nurse Practitioners here to help you manage and treat a whole host of conditions with lifestyle education including obesity, diabetes, IBS, high cholesterol, high blood pressure, reflux, food allergies and many more.
In additiona to our total lifestyle approach to healing, we also offer a comprehensive Weight Loss Medication Program utlizing the GLP medications, Wegovy and Zepbound along with other treatment options to help you achieve your optimal health!
We are a group of Dietitians and Nurse Practitioners here to help you manage and treat a whole host of conditions with lifestyle education including obesity, diabetes, IBS, high cholesterol, high blood pressure, reflux, food allergies and many more.
In additiona to our total lifestyle approach to healing, we also offer a comprehensive Weight Loss Medication Program utlizing the GLP medications, Wegovy and Zepbound along with other treatment options to help you achieve your optimal health!
(413) 225-8962 View (413) 225-8962
Photo of Cara Schrager, Nutritionist/Dietitian, MPH, RDN, LDN, CDCES
Cara Schrager
Nutritionist/Dietitian, MPH, RDN, LDN, CDCES
Online Only
I am a Registered and Licensed Dietitian and Diabetes Care and Education Specialist passionate about helping you achieve your nutrition goals. I have over a decade of experience in nutrition counseling with a special focus in working with people with diabetes and weight management. I follow a nonrestrictive "all foods fit" approach and I will help you feel empowered with your nutrition choices. As an avid marathon runner, I am also passionate about sports nutrition, helping individuals learn how to optimally fuel their bodies.
I am a Registered and Licensed Dietitian and Diabetes Care and Education Specialist passionate about helping you achieve your nutrition goals. I have over a decade of experience in nutrition counseling with a special focus in working with people with diabetes and weight management. I follow a nonrestrictive "all foods fit" approach and I will help you feel empowered with your nutrition choices. As an avid marathon runner, I am also passionate about sports nutrition, helping individuals learn how to optimally fuel their bodies.
(508) 501-7872 View (508) 501-7872
Photo of Marit Harney, Nutritionist/Dietitian, RDN, LDN, IFNCP
Marit Harney
Nutritionist/Dietitian, RDN, LDN, IFNCP
Hadley, MA 01035
She specializes in digestive wellness ( IBS, Celiac Disease, IBD, food allergies and sensitivities, GERD etc), though she also commonly helps with the following health concerns: Diabetes, Cardiovascular Disease, Hypertension, Hypercholesterolemia, Autoimmune Diseases, Prenatal nutrition, and skin issues (acne, psoriasis, eczema, etc).
Her approach is holistic in nature. She focuses on nutrition, but also changing other aspects that affect health such as stress management, sleep quantity and quality, environmental toxins, exercise, and emotional balance. She practices functional medicine, which focuses on addressing the root cause of diseases or symptoms.
She specializes in digestive wellness ( IBS, Celiac Disease, IBD, food allergies and sensitivities, GERD etc), though she also commonly helps with the following health concerns: Diabetes, Cardiovascular Disease, Hypertension, Hypercholesterolemia, Autoimmune Diseases, Prenatal nutrition, and skin issues (acne, psoriasis, eczema, etc).
Her approach is holistic in nature. She focuses on nutrition, but also changing other aspects that affect health such as stress management, sleep quantity and quality, environmental toxins, exercise, and emotional balance. She practices functional medicine, which focuses on addressing the root cause of diseases or symptoms.
(413) 320-4550 View (413) 320-4550
Photo of Karen Kiver Patalano, Nutritionist/Dietitian, MBA, RD, LDN, CDE
Karen Kiver Patalano
Nutritionist/Dietitian, MBA, RD, LDN, CDE
Online Only
Areas of specialty include weight management, avoiding or lowering medications for diabetes, blood pressure, and cholesterol as well as food sensitivities and sports nutrition. I focus on individual's specific nutritional needs from healthy cooking ideas to supporting extreme fitness endeavors. You will receive recommendations for diet and lifestyle changes to meet your personalized needs and goals. Clients keep a detailed food intake and exercise record using a free online log. By supporting gradual changes over time, the priority is to instill a greater balance in clients thereby creating a more permanent transformation to achieve weight, medical and lifestyle goals.
Areas of specialty include weight management, avoiding or lowering medications for diabetes, blood pressure, and cholesterol as well as food sensitivities and sports nutrition. I focus on individual's specific nutritional needs from healthy cooking ideas to supporting extreme fitness endeavors. You will receive recommendations for diet and lifestyle changes to meet your personalized needs and goals. Clients keep a detailed food intake and exercise record using a free online log. By supporting gradual changes over time, the priority is to instill a greater balance in clients thereby creating a more permanent transformation to achieve weight, medical and lifestyle goals.
(508) 841-3561 View (508) 841-3561

Online Dietitians and Nutritionists

Photo of Ryann Hilton - NourishRX Nutrition, Nutritionist/Dietitian, RD, LDN, CEDS-C
NourishRX Nutrition
Nutritionist/Dietitian, RD, LDN, CEDS-C
Online Only
Are you struggling with anxiety around meals, guilt after eating, or physical issues like digestive problems or hormonal imbalances? Are you feeling stuck in a cycle of dieting, restriction, or binging with no end in sight? Maybe you’re watching your child struggle with body image or refusing to eat, leaving you feeling worried and helpless. We understand that healing from an eating disorder isn’t just about food—it’s about rebuilding trust with your body and mind. Our personalized, non-judgmental approach helps you develop healthy habits. Our dietitians are here to guide you in reclaiming your health and finding long-term balance.
Are you struggling with anxiety around meals, guilt after eating, or physical issues like digestive problems or hormonal imbalances? Are you feeling stuck in a cycle of dieting, restriction, or binging with no end in sight? Maybe you’re watching your child struggle with body image or refusing to eat, leaving you feeling worried and helpless. We understand that healing from an eating disorder isn’t just about food—it’s about rebuilding trust with your body and mind. Our personalized, non-judgmental approach helps you develop healthy habits. Our dietitians are here to guide you in reclaiming your health and finding long-term balance.
(978) 451-7224 View (978) 451-7224
Photo of Matt Stranberg, Nutritionist/Dietitian, CSSD, MS, RDN, LDN, CSCS
Matt Stranberg
Nutritionist/Dietitian, CSSD, MS, RDN, LDN, CSCS
1 Endorsed
Boston, MA 02135
We are overloaded with information about food and exercise, but often struggle to find the wisdom needed to nurture these relationships. To address these issues, I have studied and worked with some of the best athletes, coaches, and teams in the world. I have cofounded research-based programs and initiatives to treat athletes struggling with eating disorders, and aim to distill the knowledge and wisdom needed to translate nutrition and exercise science into practical solutions to help you achieve your dreams. I look forward to hearing about your goals and learning how I can best equip you to develop your own sense of mastery!
We are overloaded with information about food and exercise, but often struggle to find the wisdom needed to nurture these relationships. To address these issues, I have studied and worked with some of the best athletes, coaches, and teams in the world. I have cofounded research-based programs and initiatives to treat athletes struggling with eating disorders, and aim to distill the knowledge and wisdom needed to translate nutrition and exercise science into practical solutions to help you achieve your dreams. I look forward to hearing about your goals and learning how I can best equip you to develop your own sense of mastery!
(617) 231-9373 View (617) 231-9373
Photo of Gwen G Johnson, Nutritionist/Dietitian, RD, LDN
Gwen G Johnson
Nutritionist/Dietitian, RD, LDN
Pepperell, MA 01463
Gwen is a Registered Dietitian with over 25 years of experience in the field of Nutrition and the owner of Sage Nutrition Solutions, LLC. She is a Licensed Dietitian Nutritionist in both Massachusetts and New Hampshire. Gwen is an advocate of balanced nutrition and has an all foods can fit into a healthy lifestyle philosophy. Using a science-based, individualized approach, Gwen's nutritional counseling, support, and guidance will help you manage your overall health, prevent and treat new or chronic conditions, optimize exercise performance, and build a healthy relationship with food and body.
Gwen is a Registered Dietitian with over 25 years of experience in the field of Nutrition and the owner of Sage Nutrition Solutions, LLC. She is a Licensed Dietitian Nutritionist in both Massachusetts and New Hampshire. Gwen is an advocate of balanced nutrition and has an all foods can fit into a healthy lifestyle philosophy. Using a science-based, individualized approach, Gwen's nutritional counseling, support, and guidance will help you manage your overall health, prevent and treat new or chronic conditions, optimize exercise performance, and build a healthy relationship with food and body.
(978) 581-1903 View (978) 581-1903
Photo of Suzanne Iovanni - Building Better Nutrition, Inc, Nutritionist/Dietitian, RDN, CSSD, CLT
Building Better Nutrition, Inc
Nutritionist/Dietitian, RDN, CSSD, CLT
1 Endorsed
Online Only
We are a team of Registered dietitians and Board Certified Specialist in Sports Dietetics. Building Better Nutrition specializes in eating disorders/disordered eating, sports nutrition, food sensitivities, and family wellness with health at every size approach. We offer personalized, flexible, and compassionate treatment so our clients have the tools they need to build balanced nutrition while improving their relationship with food and body to flourish and reclaim their life.
We are a team of Registered dietitians and Board Certified Specialist in Sports Dietetics. Building Better Nutrition specializes in eating disorders/disordered eating, sports nutrition, food sensitivities, and family wellness with health at every size approach. We offer personalized, flexible, and compassionate treatment so our clients have the tools they need to build balanced nutrition while improving their relationship with food and body to flourish and reclaim their life.
(978) 291-7580 View (978) 291-7580
Photo of Cynthia Milner Woodman - Risk Management Incorporated - Health Services, Nutritionist/Dietitian, MS, RDN, LDN
Risk Management Incorporated - Health Services
Nutritionist/Dietitian, MS, RDN, LDN
Shirley, MA 01464
Cindy: More than as a Medical Nutrition Therapist. Certified in Adult/Pediatric Weight Management; Sports, Cardiovascular & Wellness Nutrition; Member, Diabetes Care & Education Group, Academy of Nutrition & Dietetics. NIH, Commissioned Officer, PHS; Chief Clinical Dietitian, George Washington University Hospital; teaches student/adult groups about nutrition; presenter to the Food & Nutrition Board, National Academy of Sciences on use of RDAs in Kidney Disease. Private practice, specializing in eating disorders, weight issues, diabetes, gastrointestinal and lipid disorders, sports diets, cardiovascular and wellness.
Cindy: More than as a Medical Nutrition Therapist. Certified in Adult/Pediatric Weight Management; Sports, Cardiovascular & Wellness Nutrition; Member, Diabetes Care & Education Group, Academy of Nutrition & Dietetics. NIH, Commissioned Officer, PHS; Chief Clinical Dietitian, George Washington University Hospital; teaches student/adult groups about nutrition; presenter to the Food & Nutrition Board, National Academy of Sciences on use of RDAs in Kidney Disease. Private practice, specializing in eating disorders, weight issues, diabetes, gastrointestinal and lipid disorders, sports diets, cardiovascular and wellness.
(978) 616-4084 x12 View (978) 616-4084 x12
Photo of Samantha McCarthy, Nutritionist/Dietitian, MS, RDN
Samantha McCarthy
Nutritionist/Dietitian, MS, RDN
Haverhill, MA 01835
If you’re here, you probably want to feel better, have more energy, and finally build habits that stick—but life keeps getting in the way. Maybe you know what to do but can’t stay consistent, your schedule makes healthy eating feel impossible, or you’re overwhelmed by mixed messages and past diets that never worked. As a registered dietitian, I help you cut through the noise, simplify nutrition, and create realistic, sustainable habits that fit your life—so you can feel confident and in control again.
If you’re here, you probably want to feel better, have more energy, and finally build habits that stick—but life keeps getting in the way. Maybe you know what to do but can’t stay consistent, your schedule makes healthy eating feel impossible, or you’re overwhelmed by mixed messages and past diets that never worked. As a registered dietitian, I help you cut through the noise, simplify nutrition, and create realistic, sustainable habits that fit your life—so you can feel confident and in control again.
(351) 666-8351 x121 View (351) 666-8351 x121
Photo of Cathleen Burns, Nutritionist/Dietitian, DCN, RDN, LDN
Cathleen Burns
Nutritionist/Dietitian, DCN, RDN, LDN
1 Endorsed
Acushnet, MA 02743
Collaborative Kidney Care was launched to offer a patient-focused practice with individualized treatment plans to meet you where you are and help achieve optimized health outcomes through innovative approaches.
Collaborative Kidney Care was launched to offer a patient-focused practice with individualized treatment plans to meet you where you are and help achieve optimized health outcomes through innovative approaches.
(508) 213-0392 View (508) 213-0392
Photo of Kristin Hatch, Nutritionist/Dietitian, RDN, LDN, CDCES
Kristin Hatch
Nutritionist/Dietitian, RDN, LDN, CDCES
1 Endorsed
Lakeville, MA 02347
Kristin is a Registered Dietitian Nutritionist (RDN) and Certified Diabetes Care and Education Specialist (CDCES) who has worked with clients of all age groups in a variety of settings for over 30 years. She believes compassion, empathy, and encouragement are the greatest markers of care. She is passionate about helping clients improve quality of life while managing health concerns and understanding how the body works.
Kristin is a Registered Dietitian Nutritionist (RDN) and Certified Diabetes Care and Education Specialist (CDCES) who has worked with clients of all age groups in a variety of settings for over 30 years. She believes compassion, empathy, and encouragement are the greatest markers of care. She is passionate about helping clients improve quality of life while managing health concerns and understanding how the body works.
(508) 413-3131 View (508) 413-3131
Photo of Lauren E Ahola, Nutritionist/Dietitian, MS, RD, LDN
Lauren E Ahola
Nutritionist/Dietitian, MS, RD, LDN
Marshfield, MA 02050
LEA-Nutrition believes that diets don't work, but lifestyle changes do. Lauren has been a Registered Dietitian since 2012 and Yoga Instructor since 2015. She created LEAN to help others live their healthiest and happiest life. She is here to help you interpret all the false nutrition information out there and create an individualized nutrition plan that works for YOU.
LEA-Nutrition believes that diets don't work, but lifestyle changes do. Lauren has been a Registered Dietitian since 2012 and Yoga Instructor since 2015. She created LEAN to help others live their healthiest and happiest life. She is here to help you interpret all the false nutrition information out there and create an individualized nutrition plan that works for YOU.
(339) 244-2642 View (339) 244-2642
Photo of Ryann Hilton - NourishRX Nutrition Counseling, Nutritionist/Dietitian, RD, LDN, CEDS-C
NourishRX Nutrition Counseling
Nutritionist/Dietitian, RD, LDN, CEDS-C
Online Only
Are you struggling with anxiety around meals, guilt after eating, or physical issues like digestive problems or hormonal imbalances? Are you feeling stuck in a cycle of dieting, restriction, or binging with no end in sight? Maybe you’re watching your child struggle with body image or refusing to eat, leaving you feeling worried and helpless. We understand that healing from an eating disorder isn’t just about food—it’s about rebuilding trust with your body and mind. Our personalized, non-judgmental approach helps you develop healthy habits. Our dietitians are here to guide you in reclaiming your health and finding long-term balance.
Are you struggling with anxiety around meals, guilt after eating, or physical issues like digestive problems or hormonal imbalances? Are you feeling stuck in a cycle of dieting, restriction, or binging with no end in sight? Maybe you’re watching your child struggle with body image or refusing to eat, leaving you feeling worried and helpless. We understand that healing from an eating disorder isn’t just about food—it’s about rebuilding trust with your body and mind. Our personalized, non-judgmental approach helps you develop healthy habits. Our dietitians are here to guide you in reclaiming your health and finding long-term balance.
(603) 825-6716 View (603) 825-6716
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.