Irritable Bowel Syndrome (IBS) Nutritionists and Dietitians in Petaluma, CA

Photo of Amanda Wikan, Nutritionist/Dietitian, MS, RDN
Amanda Wikan
Nutritionist/Dietitian, MS, RDN
Petaluma, CA 94954
I specialize in Irritable Bowel Syndrome and complex gut issues that haven't responded to standard approaches.
My clients typically come to me with some combination of bloating, cramping, urgency, constipation, or diarrhea that hasn't resolved despite consistent effort, and confusion or fear around food after years of conflicting advice. Often, they've seen gastroenterologists and multiple providers without getting a clear answer.
I specialize in Irritable Bowel Syndrome and complex gut issues that haven't responded to standard approaches.
My clients typically come to me with some combination of bloating, cramping, urgency, constipation, or diarrhea that hasn't resolved despite consistent effort, and confusion or fear around food after years of conflicting advice. Often, they've seen gastroenterologists and multiple providers without getting a clear answer.
(707) 868-5718 View (707) 868-5718

More Dietitians and Nutritionists Nearby

Photo of Dr. Lillie Luu Nguyen, Nutritionist/Dietitian, DCN, CNS, LDN
Dr. Lillie Luu Nguyen
Nutritionist/Dietitian, DCN, CNS, LDN
1 Endorsed
Serves Area
Navigating the path to better nutrition and well-being can be challenging, but you don't have to go it alone. Using doctorate-level education rooted in evidence-based science, I'm here to support you with a personalized nutrition plan that not only tastes great, but also nourishes your body. We'll take a holistic approach to your health, considering all aspects of your life. If you're curious about lab tests, supplements, or assessments, we can explore those options together.
Navigating the path to better nutrition and well-being can be challenging, but you don't have to go it alone. Using doctorate-level education rooted in evidence-based science, I'm here to support you with a personalized nutrition plan that not only tastes great, but also nourishes your body. We'll take a holistic approach to your health, considering all aspects of your life. If you're curious about lab tests, supplements, or assessments, we can explore those options together.
(415) 322-5629 View (415) 322-5629
Photo of Dr. Rosa M Keller - Rosa Keller Nutrition, Nutritionist/Dietitian, PhD, RD
Rosa Keller Nutrition
Nutritionist/Dietitian, PhD, RD
Serves Area
As a nutrition scientist and registered dietitian, my goal is to help you pin-point the current challenges you are facing with your health and nutrition. Through remote Telehealth services, we will work together to create actionable steps towards long-term healthy habits. Whether that means understanding how to improve your relationships with food, weight management, fuel exercise performance, finding a meal pattern that improves digestive symptoms, managing chronic disease and more.
As a nutrition scientist and registered dietitian, my goal is to help you pin-point the current challenges you are facing with your health and nutrition. Through remote Telehealth services, we will work together to create actionable steps towards long-term healthy habits. Whether that means understanding how to improve your relationships with food, weight management, fuel exercise performance, finding a meal pattern that improves digestive symptoms, managing chronic disease and more.
(415) 712-2516 View (415) 712-2516
Photo of Haley Mannix, Nutritionist/Dietitian, CNC
Haley Mannix
Nutritionist/Dietitian, CNC
Serves Area
My practice works with motivated and curious individuals looking for integrative and functional nutrition to investigate the root drivers of digestive issues, microbiome imbalances, acne, and hormone, metabolic and immune imbalances. Nuanced, sustainable, and evidence-based recommendations are prioritized over quick-fixes and trends.
My practice works with motivated and curious individuals looking for integrative and functional nutrition to investigate the root drivers of digestive issues, microbiome imbalances, acne, and hormone, metabolic and immune imbalances. Nuanced, sustainable, and evidence-based recommendations are prioritized over quick-fixes and trends.
(415) 594-5248 View (415) 594-5248
Photo of Christy Walowit, Nutritionist/Dietitian, MS, RDN, CDCES
Christy Walowit
Nutritionist/Dietitian, MS, RDN, CDCES
Serves Area
Learn to work WITH your body, not against it! Believe it or not, you and your body are on the same team. If you're experiencing health anxiety, navigating a challenging diagnosis, or just confused about what to eat, I'm glad you're here! As your Registered Dietitian and Diabetes Specialist, I like to imagine myself as your guide to filter through all the "diet noise," medical jargon, and confusing food narratives so you can feel grounded and clear about what your body needs.
Learn to work WITH your body, not against it! Believe it or not, you and your body are on the same team. If you're experiencing health anxiety, navigating a challenging diagnosis, or just confused about what to eat, I'm glad you're here! As your Registered Dietitian and Diabetes Specialist, I like to imagine myself as your guide to filter through all the "diet noise," medical jargon, and confusing food narratives so you can feel grounded and clear about what your body needs.
(916) 775-8179 View (916) 775-8179
Photo of Ally Green, Nutritionist/Dietitian, MS, MPH, RD
Ally Green
Nutritionist/Dietitian, MS, MPH, RD
Greenbrae, CA 94904
Hi! I'm so glad you're here. My name is Ally, and I'm a dietitian who practices from an anti-diet, Health at Every Size, and intuitive eating framework. I specialize in helping people improve their relationship with food, heal from disordered eating, and address digestive health concerns. In our work together, you can expect a welcoming, nonjudgmental space where we can explore your food experiences and concerns with openness and curiosity. I provide accountability and support while honoring your unique journey.
Hi! I'm so glad you're here. My name is Ally, and I'm a dietitian who practices from an anti-diet, Health at Every Size, and intuitive eating framework. I specialize in helping people improve their relationship with food, heal from disordered eating, and address digestive health concerns. In our work together, you can expect a welcoming, nonjudgmental space where we can explore your food experiences and concerns with openness and curiosity. I provide accountability and support while honoring your unique journey.
(925) 291-9338 View (925) 291-9338
Photo of Elena Zorn, Nutritionist/Dietitian, MS, MA, FMCHC
Elena Zorn
Nutritionist/Dietitian, MS, MA, FMCHC
Online Only
Over the years, I have developed a structured approach to help clients break unhealthy habits such as excessive sugar consumption, late-night eating, frequent snacking, and negative self-talk. My goal is to support sustainable lifestyle changes that encourage healthier food choices, a balanced relationship with food, and improved overall well-being.
Over the years, I have developed a structured approach to help clients break unhealthy habits such as excessive sugar consumption, late-night eating, frequent snacking, and negative self-talk. My goal is to support sustainable lifestyle changes that encourage healthier food choices, a balanced relationship with food, and improved overall well-being.
(628) 250-4892 View (628) 250-4892
Photo of Norae Berry, Nutritionist/Dietitian, MS, RD, CLT
Norae Berry
Nutritionist/Dietitian, MS, RD, CLT
Serves Area
Conditions/diet therapies I work with often are: Food Allergy/Sensitivity IBS/IBD, Migraines, Fybromyalgia, Weight Management, Metabolic Syndrome, Pre Diabetes and Diabetes, High Cholesterol or High Blood Pressure, low FODMAP, pre-dialysis Kidney Disease, Pregnancy and Breastfeeding, Elite Sports Performance, and Eating Disorders.
Corporate Wellness: every office is interested in nutrition! We are currently providing successful and engaged through virtual group sessions. Hot topics, Q&A sessions, menu review, multi-session classes and more. Email me to set up a complimentary 15 minute phone consult and discuss current presentation titles, and your needs. $500-$2500 per event.
Conditions/diet therapies I work with often are: Food Allergy/Sensitivity IBS/IBD, Migraines, Fybromyalgia, Weight Management, Metabolic Syndrome, Pre Diabetes and Diabetes, High Cholesterol or High Blood Pressure, low FODMAP, pre-dialysis Kidney Disease, Pregnancy and Breastfeeding, Elite Sports Performance, and Eating Disorders.
Corporate Wellness: every office is interested in nutrition! We are currently providing successful and engaged through virtual group sessions. Hot topics, Q&A sessions, menu review, multi-session classes and more. Email me to set up a complimentary 15 minute phone consult and discuss current presentation titles, and your needs. $500-$2500 per event.
(415) 578-6098 View (415) 578-6098
Photo of Sabine Haake - Sabine Haake RD, Nutritionist/Dietitian, RD
Sabine Haake RD
Nutritionist/Dietitian, RD
San Rafael, CA 94903
We eat at least 3-4 times a day or 21-28 times a week. Eating is an activity we have been engaging in since we were born. We used to know when we were hungry and when we were full. When this energy giving and life sustaining act becomes a source of confusion, guilt and fear, when eating becomes disordered and turns into a dangerous coping mechanism, it is time to evaluate what we are doing and explore how we can normalize our behavior so our minds and body can function in a healthy way to support our goals.
We eat at least 3-4 times a day or 21-28 times a week. Eating is an activity we have been engaging in since we were born. We used to know when we were hungry and when we were full. When this energy giving and life sustaining act becomes a source of confusion, guilt and fear, when eating becomes disordered and turns into a dangerous coping mechanism, it is time to evaluate what we are doing and explore how we can normalize our behavior so our minds and body can function in a healthy way to support our goals.
(415) 233-7588 View (415) 233-7588
Photo of Sarah Reilly, Nutritionist/Dietitian, CNC, CNBP, AFMHCp
Sarah Reilly
Nutritionist/Dietitian, CNC, CNBP, AFMHCp
Serves Area
Do you struggle with feeling fat, bloated, achy and tired? I will help you get to the root cause of your annoying symptoms so you can FINALLY lose weight, have more energy and less pain & digestive issues. I provide a customized, cutting edge approach for each client, by combining principles of Holistic Nutrition and Functional Medicine. You will experience truly customized nutrition for YOUR unique body so you can finally STOP feeling fat, bloated, achy and tired. You CAN achieve effortless fat loss, increased energy/moods, better sleep, less pain and resolved digestive issues!
Do you struggle with feeling fat, bloated, achy and tired? I will help you get to the root cause of your annoying symptoms so you can FINALLY lose weight, have more energy and less pain & digestive issues. I provide a customized, cutting edge approach for each client, by combining principles of Holistic Nutrition and Functional Medicine. You will experience truly customized nutrition for YOUR unique body so you can finally STOP feeling fat, bloated, achy and tired. You CAN achieve effortless fat loss, increased energy/moods, better sleep, less pain and resolved digestive issues!
(925) 886-3630 View (925) 886-3630
Photo of Kia Sanford, Nutritionist/Dietitian, MS
Kia Sanford
Nutritionist/Dietitian, MS
2 Endorsed
San Rafael, CA 94915
What we eat, drink and even the air we breathe can have profound effects on our well being. By making food our medicine, Functional Clinical Nutrition transforms the daily rituals of eating into health sustaining practices. In recognizing that medicine can be food, these practices bring the mystery of attaining and maintaining within our reach. (Due to so many solicitations I must state I am not now, nor will I ever be, interested in being a part of a multi-level marketing company. Please DO NOT contact me about Mila, Isagenix, JuicePlus, or any other "opportunity". Thank you.)
What we eat, drink and even the air we breathe can have profound effects on our well being. By making food our medicine, Functional Clinical Nutrition transforms the daily rituals of eating into health sustaining practices. In recognizing that medicine can be food, these practices bring the mystery of attaining and maintaining within our reach. (Due to so many solicitations I must state I am not now, nor will I ever be, interested in being a part of a multi-level marketing company. Please DO NOT contact me about Mila, Isagenix, JuicePlus, or any other "opportunity". Thank you.)
(415) 969-5835 View (415) 969-5835

Online Dietitians and Nutritionists

Photo of Carly R Schott, Nutritionist/Dietitian, MS, RDN
Carly R Schott
Nutritionist/Dietitian, MS, RDN
Online Only
Carly grew up in the San Francisco Bay Area, and she has been a Registered Dietitian Nutritionist (RDN) for the last 11 years. Her interest in nutrition originally stemmed from the experience of being a patient herself, which gave her the drive and motivation to fight for her patients and help others through their own health and nutrition struggles. Carly has worked in acute care hospitals and in outpatient private practice, she has written for professional nutrition blogs, and she has taught numerous university nutrition courses, but her passion lies in providing one-on-one nutrition counseling.
Carly grew up in the San Francisco Bay Area, and she has been a Registered Dietitian Nutritionist (RDN) for the last 11 years. Her interest in nutrition originally stemmed from the experience of being a patient herself, which gave her the drive and motivation to fight for her patients and help others through their own health and nutrition struggles. Carly has worked in acute care hospitals and in outpatient private practice, she has written for professional nutrition blogs, and she has taught numerous university nutrition courses, but her passion lies in providing one-on-one nutrition counseling.
(510) 901-3450 View (510) 901-3450
Photo of Rheanna Smith, Nutritionist/Dietitian, MS, RDN
Rheanna Smith
Nutritionist/Dietitian, MS, RDN
Sacramento, CA 95825
You can heal your relationship with food, improve your body image, reach your fitness/performance goals, and develop healthy habits that enhance your well-being. From working as a clinical dietitian at various eating disorder recovery programs to teaching fitness classes I’ve spent several years helping people transform their health, break free from restriction, reconnect with their bodies, improve their fitness, and develop mindful eating habits rooted in self-compassion and personal choice. If you are struggling with your eating you are not alone, let me be your guide to renewing your nutrition today!
You can heal your relationship with food, improve your body image, reach your fitness/performance goals, and develop healthy habits that enhance your well-being. From working as a clinical dietitian at various eating disorder recovery programs to teaching fitness classes I’ve spent several years helping people transform their health, break free from restriction, reconnect with their bodies, improve their fitness, and develop mindful eating habits rooted in self-compassion and personal choice. If you are struggling with your eating you are not alone, let me be your guide to renewing your nutrition today!
(916) 713-3098 View (916) 713-3098
Photo of Stephanie Brooks - Bay Area Nutrition, Nutritionist/Dietitian, RDN
Bay Area Nutrition
Nutritionist/Dietitian, RDN
Campbell, CA 95008
If you or a family member is struggling with food/nutrition, frustrated with random nutrition information out there or has a nutrition related problem or diagnosis, the RDs and Nutrition Support Mentors at Bay Area Nutrition are available to help. We are dedicated to treating you, the whole person, via education, support, and devising a plan with you and for you. Our team will collaborate with other care providers on your team as needed so you can optimize your health and well-being.
If you or a family member is struggling with food/nutrition, frustrated with random nutrition information out there or has a nutrition related problem or diagnosis, the RDs and Nutrition Support Mentors at Bay Area Nutrition are available to help. We are dedicated to treating you, the whole person, via education, support, and devising a plan with you and for you. Our team will collaborate with other care providers on your team as needed so you can optimize your health and well-being.
(408) 956-6783 View (408) 956-6783
Photo of Terri Oberto, Nutritionist/Dietitian, CNC, CPT, PHT, BS
Terri Oberto
Nutritionist/Dietitian, CNC, CPT, PHT, BS
Santa Cruz, CA 95060
Our office provides extensive evaluation of questionnaires, diet analysis, urine and blood analysis from state of the art labs, in-office and home testing, Kinesiology and Sclerology. This evaluation generates a detailed protocol which is discussed in a lengthy consultation with you. We also offer several modalities which may help with issues you would like to address. These include Biofeedback, Rife, Galvanic Spa and infra red laser technologies, as well as aromatherapy, infra red sauna, cellular detox foot bath, and alkalizing therapies.
Our office provides extensive evaluation of questionnaires, diet analysis, urine and blood analysis from state of the art labs, in-office and home testing, Kinesiology and Sclerology. This evaluation generates a detailed protocol which is discussed in a lengthy consultation with you. We also offer several modalities which may help with issues you would like to address. These include Biofeedback, Rife, Galvanic Spa and infra red laser technologies, as well as aromatherapy, infra red sauna, cellular detox foot bath, and alkalizing therapies.
(831) 400-3405 View (831) 400-3405
Photo of Annie Rubin, Nutritionist/Dietitian, MS, RDN, IFNCP, CLT
Annie Rubin
Nutritionist/Dietitian, MS, RDN, IFNCP, CLT
Online Only
Are you struggling with symptoms caused by an underlying inflammatory and autoimmune condition? Do you experience pain, fatigue or digestive challenges? Are you finding that your quality of life just isn’t what it used to be? Inflammatory and autoimmune conditions can be extremely challenging, and unfortunately adjusting your diet is usually not part of the “typical” treatment plan.
Are you struggling with symptoms caused by an underlying inflammatory and autoimmune condition? Do you experience pain, fatigue or digestive challenges? Are you finding that your quality of life just isn’t what it used to be? Inflammatory and autoimmune conditions can be extremely challenging, and unfortunately adjusting your diet is usually not part of the “typical” treatment plan.
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Photo of Katherine Dittmann, Nutritionist/Dietitian, MA, MS, RD
Katherine Dittmann
Nutritionist/Dietitian, MA, MS, RD
San Francisco, CA 94109
You may feel stuck in cycles of dieting, food rules, or disordered eating that leave you anxious, overwhelmed, or disconnected from your body. You’re tired of obsessing about what, when, or how much to eat, yet still feel bad no matter what you choose. Perhaps body image concerns, shame, or self-criticism make it hard to enjoy eating or to care for yourself. You want relief from confusion and stress around food and a way to nourish yourself without guilt. My clients are often searching for more freedom, ease, and trust with food—and a kinder, more sustainable relationship with themselves.
You may feel stuck in cycles of dieting, food rules, or disordered eating that leave you anxious, overwhelmed, or disconnected from your body. You’re tired of obsessing about what, when, or how much to eat, yet still feel bad no matter what you choose. Perhaps body image concerns, shame, or self-criticism make it hard to enjoy eating or to care for yourself. You want relief from confusion and stress around food and a way to nourish yourself without guilt. My clients are often searching for more freedom, ease, and trust with food—and a kinder, more sustainable relationship with themselves.
(415) 965-2840 View (415) 965-2840
Photo of Emerald Santacruz, Nutritionist/Dietitian, BCHN, NBC-HWC, AIPCC
Emerald Santacruz
Nutritionist/Dietitian, BCHN, NBC-HWC, AIPCC
Online Only
If you are having trouble adapting to life with an autoimmune condition, you are not alone. Many look for natural options to support autoimmune conditions but expert guidance for this is not readily available in the conventional medical system. Whether you were just diagnosed or have been struggling for years, you can benefit from the support of an autoimmune wellness expert. From autoimmune friendly recipes, supportive supplements and herbs, or guidance on underlying health imbalances, I strive to help you feel your best, and in control of your health, despite autoimmunity.
If you are having trouble adapting to life with an autoimmune condition, you are not alone. Many look for natural options to support autoimmune conditions but expert guidance for this is not readily available in the conventional medical system. Whether you were just diagnosed or have been struggling for years, you can benefit from the support of an autoimmune wellness expert. From autoimmune friendly recipes, supportive supplements and herbs, or guidance on underlying health imbalances, I strive to help you feel your best, and in control of your health, despite autoimmunity.
(916) 347-5421 View (916) 347-5421
Photo of Angela Stanford, Nutritionist/Dietitian, RDN, MBA, NBC-HWC
Angela Stanford
Nutritionist/Dietitian, RDN, MBA, NBC-HWC
Danville, CA 94506
My clients tell me that I am the 'how to" voice of experience they have been looking for to encourage, support and hold them accountable as they make lifestyle changes reconnecting with their food and themselves. They call me their "personal food coach in my pocket, right there when I need her." Clients report benefits of reduced inflammation, better sleep, skin rashes disappearing, better mood, discontinued use of medication , fat loss while holding onto muscle, and confidence to chose foods that nourish their bodies and help them feel great!
My clients tell me that I am the 'how to" voice of experience they have been looking for to encourage, support and hold them accountable as they make lifestyle changes reconnecting with their food and themselves. They call me their "personal food coach in my pocket, right there when I need her." Clients report benefits of reduced inflammation, better sleep, skin rashes disappearing, better mood, discontinued use of medication , fat loss while holding onto muscle, and confidence to chose foods that nourish their bodies and help them feel great!
(925) 265-8086 View (925) 265-8086
Photo of Lisa Cross - Cross into Wellness, Nutritionist/Dietitian, MS, CN, FNTP
Cross into Wellness
Nutritionist/Dietitian, MS, CN, FNTP
Los Gatos, CA 95032
Waitlist for new clients
You are not a cookie, so you will not get a cookie-cutter approach from me! When your body feels inflamed, tired, or you are not feeling like your best self, I’m here to help identify what’s driving your symptoms. Together, we’ll explore the root causes of fatigue, brain fog, and weight resistance through a functional nutrition lens. I use highly personalized strategies which may include functional testing, blood sugar tracking, and targeted diet & lifestyle shifts to support women with metabolic health, gut health challenges, hormonal changes, and autoimmunity to help them feel their best.
You are not a cookie, so you will not get a cookie-cutter approach from me! When your body feels inflamed, tired, or you are not feeling like your best self, I’m here to help identify what’s driving your symptoms. Together, we’ll explore the root causes of fatigue, brain fog, and weight resistance through a functional nutrition lens. I use highly personalized strategies which may include functional testing, blood sugar tracking, and targeted diet & lifestyle shifts to support women with metabolic health, gut health challenges, hormonal changes, and autoimmunity to help them feel their best.
(669) 341-6261 View (669) 341-6261
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.