Irritable Bowel Syndrome (IBS) Nutritionists and Dietitians in 61107
I’m Lauren, a holistic Registered Dietitian who supports women with PCOS in their 20s through early 40s achieve regular periods with less pain, bloating, and fatigue so they can regain control of their cycles, improve fertility outcomes, and protect their future health against PCOS-related risks.
Unlike one-size-fits-all solutions like birth control, restrictive diets, or cookie-cutter group programs, my collaborative and personalized approach empowers clients to build trust in themselves while learning how to best nourish their bodies through tailored and realistic nutrition, lifestyle, and supplement strategies.
I’m Lauren, a holistic Registered Dietitian who supports women with PCOS in their 20s through early 40s achieve regular periods with less pain, bloating, and fatigue so they can regain control of their cycles, improve fertility outcomes, and protect their future health against PCOS-related risks.
Unlike one-size-fits-all solutions like birth control, restrictive diets, or cookie-cutter group programs, my collaborative and personalized approach empowers clients to build trust in themselves while learning how to best nourish their bodies through tailored and realistic nutrition, lifestyle, and supplement strategies.
More Dietitians and Nutritionists Nearby
We treat people suffering from a variety of eating disorders as well as general weight inclusive medical nutrition therapy for a variety of disease states (Diabetes, CKD, Diverticulosis, Hyperlipidemia, IBS, PCOS, Gastroparesis etc).
Our mission is to provide weight inclusive medical nutrition therapy, using the principles of Intuitive Eating in a HAES aligned practice. The intent of our counseling is to help people find peace with food freedom, develop a healthy relationship with food and their bodies, and focus on gentle nutrition to manage and prevent chronic disease states.
We treat people suffering from a variety of eating disorders as well as general weight inclusive medical nutrition therapy for a variety of disease states (Diabetes, CKD, Diverticulosis, Hyperlipidemia, IBS, PCOS, Gastroparesis etc).
Our mission is to provide weight inclusive medical nutrition therapy, using the principles of Intuitive Eating in a HAES aligned practice. The intent of our counseling is to help people find peace with food freedom, develop a healthy relationship with food and their bodies, and focus on gentle nutrition to manage and prevent chronic disease states.
Do you feel overwhelmed by a recent food allergy diagnosis? Do you have food sensitivities causing you to be afraid to try new foods? You're doing the best you can, but food is still hard. It would be great if food were easy, but it has become a source of stress in your life. You need help navigating which foods will work for you and nourish you properly.
Do you feel overwhelmed by a recent food allergy diagnosis? Do you have food sensitivities causing you to be afraid to try new foods? You're doing the best you can, but food is still hard. It would be great if food were easy, but it has become a source of stress in your life. You need help navigating which foods will work for you and nourish you properly.
Online Dietitians and Nutritionists
Specialties include Eating Disorders, Disordered Eating, Avoidant Restrictive Food Intake Disorder (ARFID), Binge Eating Disorder, Sports Nutrition, Oncology and Hematology Nutrition, Pediatrics, GI Conditions/Digestive Problems (IBD, IBS), Acid Reflux (GERD), Crohn's,Diabetes, Food Intolerance, Exercise Addiction, Hormonal Imbalance, Thyroid Conditions.
Riley’s approach to care is rooted in developing a strong rapport with the client and making client’s feel safe and heard. Per her nutrition philosophy, Riley believes in nutrition care that is a mutual conversation where a client can have a say in their care, as this will lead to more sustainable, long-term progress; additionally, Riley practices from a non-diet and Health At Every Size (HAES) perspective for all clients, regardless of diagnosis. Riley prioritizes individualized treatment, tailoring interventions to meet clients developmental, financial, physical and emotional needs.
Specialties include Eating Disorders, Disordered Eating, Avoidant Restrictive Food Intake Disorder (ARFID), Binge Eating Disorder, Sports Nutrition, Oncology and Hematology Nutrition, Pediatrics, GI Conditions/Digestive Problems (IBD, IBS), Acid Reflux (GERD), Crohn's,Diabetes, Food Intolerance, Exercise Addiction, Hormonal Imbalance, Thyroid Conditions.
Riley’s approach to care is rooted in developing a strong rapport with the client and making client’s feel safe and heard. Per her nutrition philosophy, Riley believes in nutrition care that is a mutual conversation where a client can have a say in their care, as this will lead to more sustainable, long-term progress; additionally, Riley practices from a non-diet and Health At Every Size (HAES) perspective for all clients, regardless of diagnosis. Riley prioritizes individualized treatment, tailoring interventions to meet clients developmental, financial, physical and emotional needs.
Specializes in Disordered Eating, Eating Disorders, General Healthy Eating, Irritable Bowel Syndrome, IBD, Low FODMAP, GI Conditions, Diverticulitis, Crohn's, Ulcerative Colitis, High Blood Pressure, Oncology Nutrition, Pre/Post Natal Nutrition, Malnutrition, Gastroparesis, Underweight Nutrition, Baby Led Weaning, Hyper/Hypothyroidism, and Sports Nutrition.
Heather is passionate about working collaboratively with her clients to help them heal their relationship with their body and food. She works with clients to facilitate changes that will improve overall quality of life. She believes that food and nutrition should not only support someone’s physical health, but their social, emotional, and mental health as well. Her own experiences have fueled her particular interest in intuitive eating, disordered eating and HAES aligned care. She loves working alongside clients to find creative ways to make food both nourishing and enjoyable.
Specializes in Disordered Eating, Eating Disorders, General Healthy Eating, Irritable Bowel Syndrome, IBD, Low FODMAP, GI Conditions, Diverticulitis, Crohn's, Ulcerative Colitis, High Blood Pressure, Oncology Nutrition, Pre/Post Natal Nutrition, Malnutrition, Gastroparesis, Underweight Nutrition, Baby Led Weaning, Hyper/Hypothyroidism, and Sports Nutrition.
Heather is passionate about working collaboratively with her clients to help them heal their relationship with their body and food. She works with clients to facilitate changes that will improve overall quality of life. She believes that food and nutrition should not only support someone’s physical health, but their social, emotional, and mental health as well. Her own experiences have fueled her particular interest in intuitive eating, disordered eating and HAES aligned care. She loves working alongside clients to find creative ways to make food both nourishing and enjoyable.
Abbie is passionate about helping others improve their relationship with food, body image, weight, and health. She helps clients achieve positive changes in mental and physical well-being through nutrition counseling and education. Abbie provides personalized care tailored to your nutritional needs using a non-diet approach. She offers counseling in a supportive setting, using methods like motivational interviewing and cognitive-behavioral therapy, along with tools such as hands-on activities and educational handouts.
Abbie is passionate about helping others improve their relationship with food, body image, weight, and health. She helps clients achieve positive changes in mental and physical well-being through nutrition counseling and education. Abbie provides personalized care tailored to your nutritional needs using a non-diet approach. She offers counseling in a supportive setting, using methods like motivational interviewing and cognitive-behavioral therapy, along with tools such as hands-on activities and educational handouts.
Kerri is a Registered Dietitian, specializing in working with adults and adolescents with Eating Disorders, Disordered Eating, IBS, Diabetes, and Pregnancy Nutrition.
Specialties include Eating disorders, Disordered Eating, Gastrointestinal Disorders ( IBS), Diabetes, Diabetes, Pregnancy Nutrition, and Weight Management. Other areas of practice/interest include Cardiac/Heart Health, Renal Disease, and intuitive eating.
Kerri is a Registered Dietitian, specializing in working with adults and adolescents with Eating Disorders, Disordered Eating, IBS, Diabetes, and Pregnancy Nutrition.
Specialties include Eating disorders, Disordered Eating, Gastrointestinal Disorders ( IBS), Diabetes, Diabetes, Pregnancy Nutrition, and Weight Management. Other areas of practice/interest include Cardiac/Heart Health, Renal Disease, and intuitive eating.
Meet Kelly, a dedicated Registered Dietitian with a passion for the profound connection between food, health, and the human body. Kelly's journey in the realm of nutrition has been fueled by her unwavering commitment to promoting well-being and her insatiable curiosity for learning. With a heart that genuinely loves people, Kelly derives immense satisfaction from coaching and helping individuals on their path to better health. Her fascination with medical conditions drives her to continuously seek innovative ways to make a difference in the lives of those she serves and strives to empower others to make informed, healthier choices
Meet Kelly, a dedicated Registered Dietitian with a passion for the profound connection between food, health, and the human body. Kelly's journey in the realm of nutrition has been fueled by her unwavering commitment to promoting well-being and her insatiable curiosity for learning. With a heart that genuinely loves people, Kelly derives immense satisfaction from coaching and helping individuals on their path to better health. Her fascination with medical conditions drives her to continuously seek innovative ways to make a difference in the lives of those she serves and strives to empower others to make informed, healthier choices
Specialities include: Weight management, Pre-Diabetes, Type 2 Diabetes, Gestational Diabetes, PCOS, Heart Healthy Eating, General Nutrition, High Cholesterol, Pre/Post Natal Nutrition, Celiac Disease, IBS, Vegetarian and Vegan diets.
Brittany is a Registered Dietitian Nutritionist with Health Loft who works collaboratively with clients to create life-long and sustainable changes. Brittany understands that change takes time and works with client’s to find this balance in nutrition and daily movement. Through open discussion during sessions, client's will learn how to establish daily patterns that ultimately create healthy habits for long-term success. Brittany believes there is no one perfect diet and works with you to find the dietary interventions best suited for your health journey.
Specialities include: Weight management, Pre-Diabetes, Type 2 Diabetes, Gestational Diabetes, PCOS, Heart Healthy Eating, General Nutrition, High Cholesterol, Pre/Post Natal Nutrition, Celiac Disease, IBS, Vegetarian and Vegan diets.
Brittany is a Registered Dietitian Nutritionist with Health Loft who works collaboratively with clients to create life-long and sustainable changes. Brittany understands that change takes time and works with client’s to find this balance in nutrition and daily movement. Through open discussion during sessions, client's will learn how to establish daily patterns that ultimately create healthy habits for long-term success. Brittany believes there is no one perfect diet and works with you to find the dietary interventions best suited for your health journey.
Solveig is a Registered Dietitian who specializes in women's health, fertility, and PCOS. She fosters a supportive and non-judgmental environment where clients can explore their relationship with food and learn to make mindful choices that nourish both body and soul. Solveig believes in a holistic, non-diet approach to nutrition counseling, empowering clients to be the expert of their own body. She believes her job as a dietitian is to share evidence-based knowledge, provide nutrition education, and help reframe limiting beliefs while respecting client's autonomy regarding their health choices.
Solveig is a Registered Dietitian who specializes in women's health, fertility, and PCOS. She fosters a supportive and non-judgmental environment where clients can explore their relationship with food and learn to make mindful choices that nourish both body and soul. Solveig believes in a holistic, non-diet approach to nutrition counseling, empowering clients to be the expert of their own body. She believes her job as a dietitian is to share evidence-based knowledge, provide nutrition education, and help reframe limiting beliefs while respecting client's autonomy regarding their health choices.
Specialties include Vegan/Vegetarian, Anti-inflammatory Nutrition, Heart Health, Hormonal Imbalances, GI Conditions ( IBS and IBD), GERD (Acid Reflux), Diabetes, Crohn’s, PCOS, Pre/Post Natal Nutrition, Kidney Disease, Weight Management, High Cholesterol, Ulcerative Colitis, Psychiatric Diagnosis, Hyper/Hypo-Thyroidism, Candida Overgrowth.
Anne is passionate about working collaboratively with clients to help them make healthy and sustainable diet changes that support their lifestyle and hormonal health. She understands food’s crucial role in balancing hormones and believes in the power of evidence-based research to guide her practice. Anne is particularly interested in the gut-brain connection and how it influences overall well-being. She emphasizes the importance of consuming whole foods that nourish the body and believes that access to nutritious food should be available to all.
Specialties include Vegan/Vegetarian, Anti-inflammatory Nutrition, Heart Health, Hormonal Imbalances, GI Conditions ( IBS and IBD), GERD (Acid Reflux), Diabetes, Crohn’s, PCOS, Pre/Post Natal Nutrition, Kidney Disease, Weight Management, High Cholesterol, Ulcerative Colitis, Psychiatric Diagnosis, Hyper/Hypo-Thyroidism, Candida Overgrowth.
Anne is passionate about working collaboratively with clients to help them make healthy and sustainable diet changes that support their lifestyle and hormonal health. She understands food’s crucial role in balancing hormones and believes in the power of evidence-based research to guide her practice. Anne is particularly interested in the gut-brain connection and how it influences overall well-being. She emphasizes the importance of consuming whole foods that nourish the body and believes that access to nutritious food should be available to all.
Specialties include Eating disorders, Disordered Eating, Digestive Issues ( IBS, IBD), Crohn's, Celiac, Weight Management for Adults/Adolescents, Diabetes, GERD, Allergy Nutrition, PCOS, Cardiovascular Disease, Kidney Disorders, High Blood Pressure, and other conditions.
As a dedicated and compassionate dietitian, Kristin specializes in helping her clients achieve their health and wellness goals through personalized nutrition and lifestyle changes. With a deep understanding that each individual’s dietary needs are unique, she tailors her approach to suit her client’s specific lifestyle, health conditions and goals. Kristin focuses on promoting intuitive eating and fostering a positive relationship with food, helping her clients to listen to their body’s cues and develop a more balanced and mindful approach to eating.
Specialties include Eating disorders, Disordered Eating, Digestive Issues ( IBS, IBD), Crohn's, Celiac, Weight Management for Adults/Adolescents, Diabetes, GERD, Allergy Nutrition, PCOS, Cardiovascular Disease, Kidney Disorders, High Blood Pressure, and other conditions.
As a dedicated and compassionate dietitian, Kristin specializes in helping her clients achieve their health and wellness goals through personalized nutrition and lifestyle changes. With a deep understanding that each individual’s dietary needs are unique, she tailors her approach to suit her client’s specific lifestyle, health conditions and goals. Kristin focuses on promoting intuitive eating and fostering a positive relationship with food, helping her clients to listen to their body’s cues and develop a more balanced and mindful approach to eating.
Amanda is an RD specializing in general health and wellness, eating disorders and disordered eating. She is dedicated to helping individuals heal their relationship with food and their bodies. Amanda believes in creating a compassionate and supportive environment, incorporating evidence-based nutrition practices to guide clients toward sustainable changes. She strives to empower her clients to break free from diet culture and develop a nourishing and balanced approach to eating. Amanda offers compassionate, patient-centered nutrition care, focusing on non-diet, weight-inclusive principles.
Amanda is an RD specializing in general health and wellness, eating disorders and disordered eating. She is dedicated to helping individuals heal their relationship with food and their bodies. Amanda believes in creating a compassionate and supportive environment, incorporating evidence-based nutrition practices to guide clients toward sustainable changes. She strives to empower her clients to break free from diet culture and develop a nourishing and balanced approach to eating. Amanda offers compassionate, patient-centered nutrition care, focusing on non-diet, weight-inclusive principles.
Carly is a Registered Dietitian who is passionate about helping people live their healthiest lives while fostering a positive relationship with food. She believes in taking a holistic approach to address the complex relationship between nutrition, mental health, and chronic conditions. Carly provides HAES-aligned care and emphasizes a non-diet approach for her nutrition counseling and evidenced-based interventions in several areas of health and nutrition, including but not limited to, pre-diabetes, type 2 diabetes, weight management, heart health, and GI management.
Carly is a Registered Dietitian who is passionate about helping people live their healthiest lives while fostering a positive relationship with food. She believes in taking a holistic approach to address the complex relationship between nutrition, mental health, and chronic conditions. Carly provides HAES-aligned care and emphasizes a non-diet approach for her nutrition counseling and evidenced-based interventions in several areas of health and nutrition, including but not limited to, pre-diabetes, type 2 diabetes, weight management, heart health, and GI management.
Specialties include Eating Disorders, Disordered Eating, Emotional Wellbeing, Wellness Counseling, Heart Healthy Nutrition, General Nutrition, IBS, Crohn's, Colitis, Vegan, Vegetarian diets.
Danielle is a Registered Dietitian who practices out of Health Loft. Danielle understands that making fulfilling, long-lasting, and healthful decisions requires patience and a solid client-provider relationship. Change can be challenging, and you need a supportive provider to help navigate the way as you create your own path. Danielle strongly believes that being healthy means not only taking care of our physical health, but also our mental health. Danielle understands that nutrition is not “one-size-fits-all”, and she will work to help you create a personalized plan of care to help you meet your goals.
Specialties include Eating Disorders, Disordered Eating, Emotional Wellbeing, Wellness Counseling, Heart Healthy Nutrition, General Nutrition, IBS, Crohn's, Colitis, Vegan, Vegetarian diets.
Danielle is a Registered Dietitian who practices out of Health Loft. Danielle understands that making fulfilling, long-lasting, and healthful decisions requires patience and a solid client-provider relationship. Change can be challenging, and you need a supportive provider to help navigate the way as you create your own path. Danielle strongly believes that being healthy means not only taking care of our physical health, but also our mental health. Danielle understands that nutrition is not “one-size-fits-all”, and she will work to help you create a personalized plan of care to help you meet your goals.
Other areas of expertise include but is not limited to, general healthy eating, weight management, IBS, and heart health.
Randi Andres is a Registered Dietitian Nutritionist who practices out of Health Loft specializing in working with adults and adolescents with Eating Disorders, PCOS, and Digestive Issues. Her passion is to help clients cultivate a more peaceful relationship with food and their bodies. Through a non-diet, weight inclusive philosophy, Randi enjoys providing the tools and support to clients so that they can learn to nourish their bodies in a safe, non-judgmental, and enjoyable way. She believes that through integrating the principles of intuitive eating and health at every size, everyone can and deserves to achieve food freedom.
Other areas of expertise include but is not limited to, general healthy eating, weight management, IBS, and heart health.
Randi Andres is a Registered Dietitian Nutritionist who practices out of Health Loft specializing in working with adults and adolescents with Eating Disorders, PCOS, and Digestive Issues. Her passion is to help clients cultivate a more peaceful relationship with food and their bodies. Through a non-diet, weight inclusive philosophy, Randi enjoys providing the tools and support to clients so that they can learn to nourish their bodies in a safe, non-judgmental, and enjoyable way. She believes that through integrating the principles of intuitive eating and health at every size, everyone can and deserves to achieve food freedom.
Katie specializes in working with adults and adolescents with Disordered Eating, Digestive issues ( IBS, IBD, Low FODMAP), Hormone Health (PCOS, etc.), Oncology Nutritional needs, Thyroid Disorders, Weight Management, Diabetes, General Healthy Eating, GERD, and interested in Sports Nutrition.
Katie is a Registered Dietitian Nutritionist that collaborates with all clients to create sustainable lifestyle changes that support their overall health and well-being. Food acts as fuel but also has the ability to cultivate memories, emotions and traditions. She believes that food should not only support someone’s physical health, but their social, emotional, and mental health as well. With an “all foods fit”, body positive approach, Katie focuses on identifying individual barriers and personal preferences as she works closely to establish confidence in clients reaching their unique goals.
Katie specializes in working with adults and adolescents with Disordered Eating, Digestive issues ( IBS, IBD, Low FODMAP), Hormone Health (PCOS, etc.), Oncology Nutritional needs, Thyroid Disorders, Weight Management, Diabetes, General Healthy Eating, GERD, and interested in Sports Nutrition.
Katie is a Registered Dietitian Nutritionist that collaborates with all clients to create sustainable lifestyle changes that support their overall health and well-being. Food acts as fuel but also has the ability to cultivate memories, emotions and traditions. She believes that food should not only support someone’s physical health, but their social, emotional, and mental health as well. With an “all foods fit”, body positive approach, Katie focuses on identifying individual barriers and personal preferences as she works closely to establish confidence in clients reaching their unique goals.
Hi! I'm Alisha, a registered dietitian with a passion for helping people form a healthy relationship with food and their body. Whether you're aiming to fuel for a marathon, navigating disordered eating or have health related goals in mind, I'm here to guide you to lasting, positive change.
As a foodie at heart, I believe nourishing your body should be delicious and fun! I love getting creative with food, and finding new ways to make healthy meals taste as good as they make you feel.
Hi! I'm Alisha, a registered dietitian with a passion for helping people form a healthy relationship with food and their body. Whether you're aiming to fuel for a marathon, navigating disordered eating or have health related goals in mind, I'm here to guide you to lasting, positive change.
As a foodie at heart, I believe nourishing your body should be delicious and fun! I love getting creative with food, and finding new ways to make healthy meals taste as good as they make you feel.
As a clinical nutritionist, I offer individual nutritional counseling to help you make practical and sustainable changes specifically addressing your issues through a healthy lifestyle. You'll experience optimal health and wellness when your body functions are in balance. In our fast-paced, convenience focused lives, we are faced with many obstacles that take us off course-our lifestyle and the quality of our foods, for example. I specialize in gastrointestinal wellness and detoxification support. Gastrointestinal health plays a central role in all other body systems, while support of the body's detoxification mechanisms is critical in our world today.
As a clinical nutritionist, I offer individual nutritional counseling to help you make practical and sustainable changes specifically addressing your issues through a healthy lifestyle. You'll experience optimal health and wellness when your body functions are in balance. In our fast-paced, convenience focused lives, we are faced with many obstacles that take us off course-our lifestyle and the quality of our foods, for example. I specialize in gastrointestinal wellness and detoxification support. Gastrointestinal health plays a central role in all other body systems, while support of the body's detoxification mechanisms is critical in our world today.
Formerly Ashley Evans. I am a Registered Dietitian and an alumna of Northern Illinois University. With over seven years of experience in the eating disorder field, I am deeply passionate about supporting individuals in their recovery journey. I began my nutrition career at a residential eating disorder facility in downtown Chicago and later expanded my expertise through roles in Partial Hospitalization Program (PHP) and Intensive Outpatient Program (IOP) levels of care. My nutrition philosophy emphasizes building a healthy and positive relationship with food, integrating mental, emotional, physical, and social health.
Formerly Ashley Evans. I am a Registered Dietitian and an alumna of Northern Illinois University. With over seven years of experience in the eating disorder field, I am deeply passionate about supporting individuals in their recovery journey. I began my nutrition career at a residential eating disorder facility in downtown Chicago and later expanded my expertise through roles in Partial Hospitalization Program (PHP) and Intensive Outpatient Program (IOP) levels of care. My nutrition philosophy emphasizes building a healthy and positive relationship with food, integrating mental, emotional, physical, and social health.
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.