Gastrointestinal (GI) Nutritionists and Dietitians in Marin County, CA

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
Photo of Dr. Lillie Luu Nguyen, Nutritionist/Dietitian, DCN, CNS, LDN
Dr. Lillie Luu Nguyen
Nutritionist/Dietitian, DCN, CNS, LDN
1 Endorsed
Serves Area
I specialize in helping adults dealing with chronic digestive troubles and support you in managing hormonal imbalances, whether it's Diabetes, Thyroid issues, or Women's Health concerns like PMS, PCOS, menopause, or infertility.
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.
I specialize in helping adults dealing with chronic digestive troubles and support you in managing hormonal imbalances, whether it's Diabetes, Thyroid issues, or Women's Health concerns like PMS, PCOS, menopause, or infertility.
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 Norae Berry, Nutritionist/Dietitian, MS, RD, CLT
Norae Berry
Nutritionist/Dietitian, MS, RD, CLT
Serves Area
Nutrition Counseling & Corporate Wellness Solutions, MRT LEAP food sensitivity testing/treatment. I always coordinate with your doctor when it is needed for your care. 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. Email me with questions about therapy and to schedule a virtual visit at this time. I look forward to working with you!
Nutrition Counseling & Corporate Wellness Solutions, MRT LEAP food sensitivity testing/treatment. I always coordinate with your doctor when it is needed for your care. 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. Email me with questions about therapy and to schedule a virtual visit at this time. I look forward to working with you!
(415) 578-6098 View (415) 578-6098
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.
Through a combination of evidence-based functional testing, blood chemistry analysis, glucose monitoring, tailored dietary modifications, targeted supplementation protocols, and a highly personalized and nuanced approach, I aim to identify imbalances and devise a plan that is both results driven and attainable.
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.
Through a combination of evidence-based functional testing, blood chemistry analysis, glucose monitoring, tailored dietary modifications, targeted supplementation protocols, and a highly personalized and nuanced approach, I aim to identify imbalances and devise a plan that is both results driven and attainable.
(415) 594-5248 View (415) 594-5248
Photo of Sarah Reilly, Nutritionist/Dietitian, CNC, CNBP, AFMHCp
Sarah Reilly
Nutritionist/Dietitian, CNC, CNBP, AFMHCp
Serves Area
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 am a Functional Medicine Nutritionist & Burnout Recovery Specialist. I combine Holistic Clinical Nutrition & Functional Medicine principles to provide a comprehensive and personalized process to achieve your goals. In clinical practice for 16 years, I continue studies in these powerful disciplines to stay on the forefront of cutting edge applications.
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 am a Functional Medicine Nutritionist & Burnout Recovery Specialist. I combine Holistic Clinical Nutrition & Functional Medicine principles to provide a comprehensive and personalized process to achieve your goals. In clinical practice for 16 years, I continue studies in these powerful disciplines to stay on the forefront of cutting edge applications.
(925) 886-3630 View (925) 886-3630
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 Ally Green, Nutritionist/Dietitian, MS, MPH, RD
Ally Green
Nutritionist/Dietitian, MS, MPH, RD
Greenbrae, CA 94904
I specialize in helping people improve their relationship with food, heal from disordered eating, and address digestive health concerns.
I offer virtual 1:1 sessions—60 minutes for initial appointments and 45 minutes for follow-ups.
I specialize in helping people improve their relationship with food, heal from disordered eating, and address digestive health concerns.
I offer virtual 1:1 sessions—60 minutes for initial appointments and 45 minutes for follow-ups.
(925) 291-9338 View (925) 291-9338
Photo of Katherine Dittmann, Nutritionist/Dietitian, MA, MS, RD
Katherine Dittmann
Nutritionist/Dietitian, MA, MS, RD
Serves Area
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 Brenna O'Malley, Nutritionist/Dietitian, RD
Brenna O'Malley
Nutritionist/Dietitian, RD
Online Only
Waitlist for new clients
Hi, I'm Brenna! I work with adolescents, teens and adults who are struggling with disordered eating, recovery from chronic dieting, binge-restrict cycles, body image concerns and wanting to be able to pursue health without obsession. It's common to be interested in or passionate about food, health, wellness exercise - but when those interests become inflexible, or don't allow for you to spend time and feel present doing other things that are important to you, it can be a sign to reach out.
Hi, I'm Brenna! I work with adolescents, teens and adults who are struggling with disordered eating, recovery from chronic dieting, binge-restrict cycles, body image concerns and wanting to be able to pursue health without obsession. It's common to be interested in or passionate about food, health, wellness exercise - but when those interests become inflexible, or don't allow for you to spend time and feel present doing other things that are important to you, it can be a sign to reach out.
(415) 798-9738 View (415) 798-9738
Photo of Dr. Rosa M Keller - Rosa Keller Nutrition, Nutritionist/Dietitian, PhD, RD
Rosa Keller Nutrition
Nutritionist/Dietitian, PhD, RD
Serves Area
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.
I use evidence-based research and real-life tools to help design eating patterns and meal ideas to support your lifestyle changes. My training is in sports nutrition, fueling exercise and learning to manage your chronic diseases including diabetes, high blood pressure, high cholesterol, kidney disease and liver disease.
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.
I use evidence-based research and real-life tools to help design eating patterns and meal ideas to support your lifestyle changes. My training is in sports nutrition, fueling exercise and learning to manage your chronic diseases including diabetes, high blood pressure, high cholesterol, kidney disease and liver disease.
(415) 712-2516 View (415) 712-2516

Online Dietitians and Nutritionists

Photo of Annie Rubin, Nutritionist/Dietitian, MS, RDN, IFNCP, CLT
Annie Rubin
Nutritionist/Dietitian, MS, RDN, IFNCP, CLT
Online Only
Do you experience pain, fatigue or digestive challenges?
In my work with clients struggling with autoimmune or inflammatory disorders, I help them implement a personalized nutrition roadmap designed to improve mobility, concentration and energy levels to ultimately live a vibrant and fulfilling life.
Do you experience pain, fatigue or digestive challenges?
In my work with clients struggling with autoimmune or inflammatory disorders, I help them implement a personalized nutrition roadmap designed to improve mobility, concentration and energy levels to ultimately live a vibrant and fulfilling life.
View
Photo of Saima Chaudhry, Nutritionist/Dietitian, MPH, RDN, CDCES
Saima Chaudhry
Nutritionist/Dietitian, MPH, RDN, CDCES
Online Only
Whether you're navigating diabetes, digestive issues, or other conditions, I offer expert guidance, practical tools, and compassionate coaching to help you take charge of your health.
I specialize in pre-diabetes, gestational diabetes, diabetes type 2, weight management, PCOS, cholesterol, high blood pressure, gut health, bariatric surgery, pregnancy/lactation and South Asian health.
Whether you're navigating diabetes, digestive issues, or other conditions, I offer expert guidance, practical tools, and compassionate coaching to help you take charge of your health.
I specialize in pre-diabetes, gestational diabetes, diabetes type 2, weight management, PCOS, cholesterol, high blood pressure, gut health, bariatric surgery, pregnancy/lactation and South Asian health.
(240) 776-7682 View (240) 776-7682
Photo of Emerald Santacruz, Nutritionist/Dietitian, BCHN, NBC-HWC, AIPCC
Emerald Santacruz
Nutritionist/Dietitian, BCHN, NBC-HWC, AIPCC
Online Only
I emphasize the power that food has on systems and processes like inflammation, gut health, and the immune system.
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.
I emphasize the power that food has on systems and processes like inflammation, gut health, and the immune system.
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 Christy Walowit, Nutritionist/Dietitian, MS, RDN, CDCES
Christy Walowit
Nutritionist/Dietitian, MS, RDN, CDCES
San Francisco, CA 94127
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 Naia Riley, Nutritionist/Dietitian, RDN, BS
Naia Riley
Nutritionist/Dietitian, RDN, BS
1 Endorsed
Oakland, CA 94611
I specialize in trauma-informed care for eating disorders, feeding disorders (ARFID, Rumination Syndrome), digestive issues, and navigating allergens.
Accepting New Clients! Tired of feeling like food is the enemy or your body is a problem to fix? If you're exhausted from second-guessing every bite, overwhelmed by food decisions, or disconnected from your body’s cues, you're not alone — and you don’t have to heal alone either. Many of my clients come to me feeling like they’ve tried everything and still feel stuck. I’m here to offer a new way forward: one rooted in safety, compassion, creativity, and who You are as a whole person.
I specialize in trauma-informed care for eating disorders, feeding disorders (ARFID, Rumination Syndrome), digestive issues, and navigating allergens.
Accepting New Clients! Tired of feeling like food is the enemy or your body is a problem to fix? If you're exhausted from second-guessing every bite, overwhelmed by food decisions, or disconnected from your body’s cues, you're not alone — and you don’t have to heal alone either. Many of my clients come to me feeling like they’ve tried everything and still feel stuck. I’m here to offer a new way forward: one rooted in safety, compassion, creativity, and who You are as a whole person.
(510) 201-5672 View (510) 201-5672
Photo of Ashley Fortenberry, Nutritionist/Dietitian, RD/RDN, LDN, CDN, CDCES, IFNCP
Ashley Fortenberry
Nutritionist/Dietitian, RD/RDN, LDN, CDN, CDCES, IFNCP
1 Endorsed
Online Only
Ebb & Flow Medical Nutrition Therapy & Consulting: helping people with chronic conditions - such as PCOS, diabetes, hypertension, and disordered eating - find solutions and peace with food through evidence-based, functional nutrition. I use food and nutrients to remit or improve chronic conditions, while teaching you about food/your body along the way. We look forward to meeting and working with you!
Ebb & Flow Medical Nutrition Therapy & Consulting: helping people with chronic conditions - such as PCOS, diabetes, hypertension, and disordered eating - find solutions and peace with food through evidence-based, functional nutrition. I use food and nutrients to remit or improve chronic conditions, while teaching you about food/your body along the way. We look forward to meeting and working with you!
(916) 409-3008 View (916) 409-3008
Photo of Melissa Goode, Nutritionist/Dietitian, MPH, RDN
Melissa Goode
Nutritionist/Dietitian, MPH, RDN
Sacramento, CA 95816
Are you exhausted from thinking about food and your body all of the time? Today’s world is filled with messages telling us to shrink our bodies, try the latest diet, and fit into an "ideal" weight category. If you're tired of keeping up with the latest food trends, Googling nutrition advice, and trying everything under the sun to achieve "perfect" health, you've come to the right place! Goode Nutrition is for fellow humans wanting to build a healthier relationship with food and their body, navigate chronic conditions by partnering with their body vs against it, and unlearn the ways diet culture has taken up precious brain space.
Are you exhausted from thinking about food and your body all of the time? Today’s world is filled with messages telling us to shrink our bodies, try the latest diet, and fit into an "ideal" weight category. If you're tired of keeping up with the latest food trends, Googling nutrition advice, and trying everything under the sun to achieve "perfect" health, you've come to the right place! Goode Nutrition is for fellow humans wanting to build a healthier relationship with food and their body, navigate chronic conditions by partnering with their body vs against it, and unlearn the ways diet culture has taken up precious brain space.
(916) 306-7979 View (916) 306-7979
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 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
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.
If you feel dismissed, overwhelmed, or unsure what to do next—I can help you. I’ve been there too. I take a personalized, root-cause approach to help you connect the dots and make practical, lasting changes. If you're ready to feel more like yourself again, I'd love to support you every step of the way.
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.
If you feel dismissed, overwhelmed, or unsure what to do next—I can help you. I’ve been there too. I take a personalized, root-cause approach to help you connect the dots and make practical, lasting changes. If you're ready to feel more like yourself again, I'd love to support you every step of the way.
(669) 341-6261 View (669) 341-6261
Gastrointestinal (GI) Nutritionists and Dietitians
What is gut health?
Gut health refers to the overall functioning and well-being of the gastrointestinal (GI) system. Key to gut health is the gut microbiome, which is the collection of healthy bacteria living in the gut. These bacteria are essential for the digestion and breakdown of food, and their health significantly impacts digestion. Poor gut health can result in symptoms such as bloating, gas, diarrhea, constipation, and general abdominal discomfort, which may indicate imbalances or issues with the gut microbiome.

Can diet help with GI issues?
Diet plays a major role in gut health, and changes in diet can often reduce or eliminate some of the symptoms associated with gastrointestinal (GI) issues. Often, GI distress is due to food intolerances or sensitivities, such as gluten sensitivity or lactose intolerance. In these cases, eliminating the problematic foods from the diet can resolve the issue. GI problems can also stem from a combination of environmental or genetic factors, such as in the case of irritable bowel syndrome (IBS). Disruptions in the gut microbiome, such as those caused by taking antibiotics, can also lead to GI issues. In both scenarios, maintaining a balanced diet as much as possible with foods that support a healthy microbiome—such as fruits, vegetables, whole grains, and probiotic foods—can often significantly reduce symptoms and improve gut health.

What are the best foods for gut health?
Maintaining a balanced microbiome is essential for gut health, and this is best achieved through a varied diet rich in fruits, vegetables, and probiotic foods. Fruits and vegetables provide essential nutrients and fiber, which nourish the beneficial bacteria in the gut. Probiotic foods, which are those that contain live bacteria, are also great for gut health. Consuming probiotic foods and drinks, such as yogurt, kefir, kombucha, and tempeh, can help support the microbiome by contributing to the diversity of bacteria within the gut.

When should I see a dietitian for GI issues?
Many people can benefit from seeing a dietitian for GI issues. In general, most dietitians are knowledgeable about what foods support gut health and may help clients choose foods that support a healthy GI system, such as fruits and vegetables high in fiber or foods high in probiotics. Dietitians may be especially beneficial to clients with known gastrointestinal concerns, such as irritable bowel syndrome (IBS) or gastroesophageal reflux disease (GERD). For clients diagnosed with these or similar conditions, dietitians can help clients identify food triggers and develop a meal plan for the client that minimizes symptoms. Dietitians may also work with clients who are having gastrointestinal distress (such as bloating, gas, constipation, diarrhea, etc.) but are not aware of the cause of their symptoms. In such cases, dietitians may be able to help the client identify the cause of the GI distress and coordinate with other medical professionals to help the client better manage their symptoms.