Gastrointestinal (GI) Nutritionists and Dietitians in Windsor, CO

Photo of Nicole Eckman, Nutritionist/Dietitian, RDN, CLT
Nicole Eckman
Nutritionist/Dietitian, RDN, CLT
Serves Area
This patient-centered approach looks at the root of your condition, rather than the symptoms alone, I will help you modify your diet and lifestyle to provide a supportive healing environment for chronic conditions such as Gut issues, autoimmune conditions, hormonal imbalances, blood sugar dysregulation, food intolerances,
When I meet a new patient, I focus on meeting them where they are and making small changes to help build confidence. I stress the importance of using nutrition to PREVENT poor health and chronic illness. I teach clients how to modify their diet to include more clean, whole foods.
This patient-centered approach looks at the root of your condition, rather than the symptoms alone, I will help you modify your diet and lifestyle to provide a supportive healing environment for chronic conditions such as Gut issues, autoimmune conditions, hormonal imbalances, blood sugar dysregulation, food intolerances,
When I meet a new patient, I focus on meeting them where they are and making small changes to help build confidence. I stress the importance of using nutrition to PREVENT poor health and chronic illness. I teach clients how to modify their diet to include more clean, whole foods.
(970) 237-3937 View (970) 237-3937
Photo of Tracy Brown, Nutritionist/Dietitian, RD, LD/N
Tracy Brown
Nutritionist/Dietitian, RD, LD/N
Serves Area
It is not often we are encouraged to honor our bodies needs.  We live in world that teaches us to "watch it" and "have it together", especially around weight and food.  Unfortunately, this constant pressure to "be good" can play a role in constant dieting, restricting, binging, purging and an all or nothing attitude around exercise.  Fortunately, we can make peace with food and our bodies again.  My approach of somatic nutrition therapy and coaching teaches intuitive eating and body wisdom skills to learn to trust our bodies again.
It is not often we are encouraged to honor our bodies needs.  We live in world that teaches us to "watch it" and "have it together", especially around weight and food.  Unfortunately, this constant pressure to "be good" can play a role in constant dieting, restricting, binging, purging and an all or nothing attitude around exercise.  Fortunately, we can make peace with food and our bodies again.  My approach of somatic nutrition therapy and coaching teaches intuitive eating and body wisdom skills to learn to trust our bodies again.
(239) 266-2502 View (239) 266-2502

More Dietitians and Nutritionists Nearby

Photo of Marissa Mekelburg, Nutritionist/Dietitian, MS, RDN, CLT, HHP
Marissa Mekelburg
Nutritionist/Dietitian, MS, RDN, CLT, HHP
2 Endorsed
Online Only
Are you experiencing digestive symptoms such as bloating, gas, constipation, or diarrhea alongside fatigue, brain fog, weight changes, or thyroid concerns like Hashimoto’s?
As a Registered Dietitian and Functional Nutrition Practitioner with over 20 years of experience, I take a whole-person, root-cause approach to health. While I have extensive experience in gastrointestinal conditions my work extends beyond digestion to include thyroid health, autoimmune conditions, energy, sleep, hormonal support and lifestyle balance.
Are you experiencing digestive symptoms such as bloating, gas, constipation, or diarrhea alongside fatigue, brain fog, weight changes, or thyroid concerns like Hashimoto’s?
As a Registered Dietitian and Functional Nutrition Practitioner with over 20 years of experience, I take a whole-person, root-cause approach to health. While I have extensive experience in gastrointestinal conditions my work extends beyond digestion to include thyroid health, autoimmune conditions, energy, sleep, hormonal support and lifestyle balance.
(970) 620-9363 View (970) 620-9363
Photo of Cassie Petro, Nutritionist/Dietitian, MS, CN, CNS
Cassie Petro
Nutritionist/Dietitian, MS, CN, CNS
1 Endorsed
Frederick, CO 80530
Waitlist for new clients
I work with toddlers, children, teens, and adults with digestive, metabolic, autoimmune, and chronic conditions to improve their quality of life.
Our lives revolve around and depend on food, which is why nurturing your relationship to food is crucial to your health and something I strive to help strengthen. My approach to nutrition therapy is collaborative and personalized to optimize function within the whole body. Evidence-based nutrition science, health coaching, and trauma-informed care guide my practice to meet the needs of each individual I work with. I recognize the various challenges that can impact proper nutrition and aim to reduce internal and external limitations through nutrition education, empowerment, and behavior change.
I work with toddlers, children, teens, and adults with digestive, metabolic, autoimmune, and chronic conditions to improve their quality of life.
Our lives revolve around and depend on food, which is why nurturing your relationship to food is crucial to your health and something I strive to help strengthen. My approach to nutrition therapy is collaborative and personalized to optimize function within the whole body. Evidence-based nutrition science, health coaching, and trauma-informed care guide my practice to meet the needs of each individual I work with. I recognize the various challenges that can impact proper nutrition and aim to reduce internal and external limitations through nutrition education, empowerment, and behavior change.
(720) 580-4263 View (720) 580-4263
Photo of Alec Moore, Nutritionist/Dietitian, RD, LD
Alec Moore
Nutritionist/Dietitian, RD, LD
1 Endorsed
Online Only
As owner of Nutrition Collaborative, I specialize in sports performance fueling, weight management, digestive support, and sustainable lifestyle change.
I offer 1-on-1 nutrition coaching, medical nutrition therapy, and consultations designed to create lasting change. Clients gain practical tools, education, and structured guidance that build confidence and independence, equipping them to manage their nutrition successfully for life.
As owner of Nutrition Collaborative, I specialize in sports performance fueling, weight management, digestive support, and sustainable lifestyle change.
I offer 1-on-1 nutrition coaching, medical nutrition therapy, and consultations designed to create lasting change. Clients gain practical tools, education, and structured guidance that build confidence and independence, equipping them to manage their nutrition successfully for life.
(469) 809-4761 View (469) 809-4761
Photo of Dr. Kristy Hall, Nutritionist/Dietitian, DSc, MS, BCHN, RNCP, ROHP
Dr. Kristy Hall
Nutritionist/Dietitian, DSc, MS, BCHN, RNCP, ROHP
Loveland, CO 80538
Kristy specializes in nutrition, epigenetics, and neural entrainment empowering people to maximize their health. Using scientific tools and evidence-based research, I develop a unique program customized to fit your health and wellness needs. Health is like a 7 layer dip: diet, lifestyle, environment, family history, diagnoses, signs & symptoms, and epigenetics. Your genes make up about 30% of your health. While you can't control the genes you get you can support where you have inherent weaknesses.
Kristy specializes in nutrition, epigenetics, and neural entrainment empowering people to maximize their health. Using scientific tools and evidence-based research, I develop a unique program customized to fit your health and wellness needs. Health is like a 7 layer dip: diet, lifestyle, environment, family history, diagnoses, signs & symptoms, and epigenetics. Your genes make up about 30% of your health. While you can't control the genes you get you can support where you have inherent weaknesses.
(970) 660-5119 View (970) 660-5119
Photo of Margo Gasta, Nutritionist/Dietitian, DCN, RDN, CCH
Margo Gasta
Nutritionist/Dietitian, DCN, RDN, CCH
Serves Area
I provide advanced level integrative and functional nutritional care as well as homeopathy. I help people who are struggling with difficult chronic, complicated health issues who would like to add nutrition and homeopathy as a complement to their conventional medical care. I use nutritional testing to help pinpoint the root cause of your symptoms and to help balance your nutritional biochemistry. I also provide group coaching for people struggling with emotional and stress overeating. Please visit my website for more information and to book a free discovery call www.nutritionbymargo.com.
I provide advanced level integrative and functional nutritional care as well as homeopathy. I help people who are struggling with difficult chronic, complicated health issues who would like to add nutrition and homeopathy as a complement to their conventional medical care. I use nutritional testing to help pinpoint the root cause of your symptoms and to help balance your nutritional biochemistry. I also provide group coaching for people struggling with emotional and stress overeating. Please visit my website for more information and to book a free discovery call www.nutritionbymargo.com.
(720) 580-5746 View (720) 580-5746
Photo of Patty McManamee, Nutritionist/Dietitian, MS, LDN, CNS, INHC
Patty McManamee
Nutritionist/Dietitian, MS, LDN, CNS, INHC
Online Only
Most of my clients come to me to lose weight, but often we discover other health issues that are causing the weight issues, such as, chronic inflammation, chronic stress, toxic overload, and gastrointestinal issues, such as, poor digestion and absorption of foods.
I love to empower people to take charge of their own health outcomes through nutrition, stress management, sleep, movement, and mind-body connection. I believe in lifestyle-based therapies because it is the things we do everyday that make the greatest impact on our health. I offer support, guidance, education, and accountability for each one of my clients.
Most of my clients come to me to lose weight, but often we discover other health issues that are causing the weight issues, such as, chronic inflammation, chronic stress, toxic overload, and gastrointestinal issues, such as, poor digestion and absorption of foods.
I love to empower people to take charge of their own health outcomes through nutrition, stress management, sleep, movement, and mind-body connection. I believe in lifestyle-based therapies because it is the things we do everyday that make the greatest impact on our health. I offer support, guidance, education, and accountability for each one of my clients.
(301) 409-5247 View (301) 409-5247
Photo of Malou Aragon Nichols, Nutritionist/Dietitian, RDN
Malou Aragon Nichols
Nutritionist/Dietitian, RDN
Fort Collins, CO 80525
Malou /mah-loo/ sees individuals as experts in their lived experience and believes in their inherent wholeness. They view cultural food and foodways as an integral part of our relationship with self, health, and nature. She identifies as a Filipino/a/x dietitian because it holds cultural, social significance to them and influences their care work. They bring humility to their work, aspiring to cultivate embodied relationships with food and well-being. She is passionate about supporting folks with complex medical concerns and prioritizes a weight-inclusive or fat-positive approach.
Malou /mah-loo/ sees individuals as experts in their lived experience and believes in their inherent wholeness. They view cultural food and foodways as an integral part of our relationship with self, health, and nature. She identifies as a Filipino/a/x dietitian because it holds cultural, social significance to them and influences their care work. They bring humility to their work, aspiring to cultivate embodied relationships with food and well-being. She is passionate about supporting folks with complex medical concerns and prioritizes a weight-inclusive or fat-positive approach.
(970) 442-9670 View (970) 442-9670
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?
The dietitians you will meet at NourishRX are passionate about eating disorders, continued eating disorder recovery, disordered eating patterns, diet-culture trauma, ARFID, picky eating, binge and emotional eating. We strive to help clients work on improving their relationship with food and their bodies using a customized, therapeutic, non-diet approach.
Are you struggling with anxiety around meals, guilt after eating, or physical issues like digestive problems or hormonal imbalances?
The dietitians you will meet at NourishRX are passionate about eating disorders, continued eating disorder recovery, disordered eating patterns, diet-culture trauma, ARFID, picky eating, binge and emotional eating. We strive to help clients work on improving their relationship with food and their bodies using a customized, therapeutic, non-diet approach.
(720) 868-9354 View (720) 868-9354
Photo of Malia Dunn, Nutritionist/Dietitian, RDN, CEDRD, CPT
Malia Dunn
Nutritionist/Dietitian, RDN, CEDRD, CPT
Serves Area
As a Certified Eating Disorder Specialist, I can help you pursue eating disorder recovery, make peace with food, and heal with nutrition. I have been trained and supervised by the Intuitive Eating founders, Elyse Resch and Evelyn Tribole, and received my Certified Intuitive Eating Counselor certification.
As a Certified Eating Disorder Specialist, I can help you pursue eating disorder recovery, make peace with food, and heal with nutrition. I have been trained and supervised by the Intuitive Eating founders, Elyse Resch and Evelyn Tribole, and received my Certified Intuitive Eating Counselor certification.
(720) 432-1622 View (720) 432-1622
Photo of Brittany Sparks - Nutrition by Brittany LLC, Nutritionist/Dietitian, RDN, CSR, CDN
Nutrition by Brittany LLC
Nutritionist/Dietitian, RDN, CSR, CDN
1 Endorsed
Serves Area
I am a specialist in renal nutrition and have a strong background in caring for patients with kidney disorders, heart health, diabetes, pregnancy and lactation, thyroid disorders and gastrointestinal disorders.
I have spent years working in some of the top rated hospitals and have shifted towards working more closely with my clients. Focusing on disease prevention and progression with a healthful lifestyle. I am an experienced cook and will offer realistic and manageable ways to improve your health with food. .
I am a specialist in renal nutrition and have a strong background in caring for patients with kidney disorders, heart health, diabetes, pregnancy and lactation, thyroid disorders and gastrointestinal disorders.
I have spent years working in some of the top rated hospitals and have shifted towards working more closely with my clients. Focusing on disease prevention and progression with a healthful lifestyle. I am an experienced cook and will offer realistic and manageable ways to improve your health with food. .
(916) 347-9837 View (916) 347-9837
Photo of Kristen Arnold - Kristen Arnold and Team, Nutritionist/Dietitian, MS, RDN, CSSD
Kristen Arnold and Team
Nutritionist/Dietitian, MS, RDN, CSSD
Online Only
Hi there! I help athletes, physically active individuals, and teams optimize their performance and health through sports nutrition coaching services. Understanding all of the research and beneficial nutrition strategies, putting them into practice, and maintaining consistency can be tough. We will work on building positive eating habits that work for YOU and YOUR lifestyle and needs. Here are a few outcomes of clients I work with: extra edge to perform in your sport, better energy levels throughout the day and during training&competition, faster recovery, sick less often, preventing/treating injuries, better relationships with food.
Hi there! I help athletes, physically active individuals, and teams optimize their performance and health through sports nutrition coaching services. Understanding all of the research and beneficial nutrition strategies, putting them into practice, and maintaining consistency can be tough. We will work on building positive eating habits that work for YOU and YOUR lifestyle and needs. Here are a few outcomes of clients I work with: extra edge to perform in your sport, better energy levels throughout the day and during training&competition, faster recovery, sick less often, preventing/treating injuries, better relationships with food.
(614) 389-9392 View (614) 389-9392

Online Dietitians and Nutritionists

Photo of Becky Bell, Nutritionist/Dietitian, MS, RDN, IFNCP, CLT
Becky Bell
Nutritionist/Dietitian, MS, RDN, IFNCP, CLT
1 Endorsed
Wheat Ridge, CO 80033
Ready to get rid of bloating, digestive issues, and and chronic fatigue?
I'm Becky, a dietitian with a passion for helping you feel amazing in your body. I offer both in-person and virtual nutrition counseling. I also offer functional lab testing to help you get to the root of your symptoms.
Ready to get rid of bloating, digestive issues, and and chronic fatigue?
I'm Becky, a dietitian with a passion for helping you feel amazing in your body. I offer both in-person and virtual nutrition counseling. I also offer functional lab testing to help you get to the root of your symptoms.
(720) 817-6853 View (720) 817-6853
Photo of Francisco Antonio Padilla - Nutri-bol LLC, Nutritionist/Dietitian, MS, RDN, CSSD, CPT
Nutri-bol LLC
Nutritionist/Dietitian, MS, RDN, CSSD, CPT
Online Only
Hello, I'm Francisco A. Padilla, and I'm dedicated to supporting you in reaching your health and wellness objectives through the fundamental roles of nutrition and hydration. With extensive knowledge and experience, I'm equipped to assist you on your path to a healthier lifestyle, regardless of your background or goals. My educational background includes an M.S. in Sports Nutrition and I am a Registered Dietitian Nutritionist (RD), committed to providing personalized, evidence-based advice to meet your specific needs.
Hello, I'm Francisco A. Padilla, and I'm dedicated to supporting you in reaching your health and wellness objectives through the fundamental roles of nutrition and hydration. With extensive knowledge and experience, I'm equipped to assist you on your path to a healthier lifestyle, regardless of your background or goals. My educational background includes an M.S. in Sports Nutrition and I am a Registered Dietitian Nutritionist (RD), committed to providing personalized, evidence-based advice to meet your specific needs.
(720) 790-4913 View (720) 790-4913
Photo of Nadia Pugh, Nutritionist/Dietitian, MS, RDN, LDN
Nadia Pugh
Nutritionist/Dietitian, MS, RDN, LDN
4 Endorsed
Denver, CO 80209
, pediatrics, disordered eating, generalized healthy eating, ketogenic diet, tube feed management, GI health, weight loss and weight promotion.
Nadia is passionate about women’s health, PCOS, fertility, thyroid and autoimmune disorders, renal health, and diabetes management. Her holistic approach focuses on individualized nutrition plans that cater to your unique needs and goals. She emphasizes that there’s no one-size-fits-all diet and aims to empower you with healthy eating habits that resonate with your preferences. Whether you’re addressing imbalances, seeking better habits, or enhancing your relationship with food, Nadia is committed to providing personalized support and practical advice for lasting well-being.
, pediatrics, disordered eating, generalized healthy eating, ketogenic diet, tube feed management, GI health, weight loss and weight promotion.
Nadia is passionate about women’s health, PCOS, fertility, thyroid and autoimmune disorders, renal health, and diabetes management. Her holistic approach focuses on individualized nutrition plans that cater to your unique needs and goals. She emphasizes that there’s no one-size-fits-all diet and aims to empower you with healthy eating habits that resonate with your preferences. Whether you’re addressing imbalances, seeking better habits, or enhancing your relationship with food, Nadia is committed to providing personalized support and practical advice for lasting well-being.
(904) 567-0490 View (904) 567-0490
Photo of Angela B Moore, Nutritionist/Dietitian, MS, RD, CLT
Angela B Moore
Nutritionist/Dietitian, MS, RD, CLT
1 Endorsed
Online Only
Through advanced testing, such as micronutrient analysis, food allergies and sensitivities, hormone panels, gene variants, and gut microbiome assessments, I help uncover imbalances and provide targeted interventions tailored to each individual’s unique needs.
Are you experiencing frequent migraines, chronic digestive problems, fatigue and joint pain, let a Certified LEAP Therapist experienced in an integrative approach to food allergies, sensitivities, and intolerances help you "calm your immune system, heal your GI tract, and improve your long term health. MRT/LEAP can help you!
Through advanced testing, such as micronutrient analysis, food allergies and sensitivities, hormone panels, gene variants, and gut microbiome assessments, I help uncover imbalances and provide targeted interventions tailored to each individual’s unique needs.
Are you experiencing frequent migraines, chronic digestive problems, fatigue and joint pain, let a Certified LEAP Therapist experienced in an integrative approach to food allergies, sensitivities, and intolerances help you "calm your immune system, heal your GI tract, and improve your long term health. MRT/LEAP can help you!
(720) 358-5148 View (720) 358-5148
Photo of Nell Harloe, Nutritionist/Dietitian, MS, RD, CDCES
Nell Harloe
Nutritionist/Dietitian, MS, RD, CDCES
Online Only
I’ve helped my patients manage various health conditions including weight management, diabetes, bariatric, gastrointestinal health, oncology, renal, cardiovascular, PCOS, menopause, thyroid health and autoimmune disorders.
In addition to receiving my B.S. in Dietetics from Baylor University, I completed my Masters in Dietetics from Sam Houston State, am a Board-Certified Diabetes Care and Education Specialist (CDCES) and received my certification in Adult Weight Management from the Academy of Dietetics. I am up to date with all weight loss medications on the market.
I’ve helped my patients manage various health conditions including weight management, diabetes, bariatric, gastrointestinal health, oncology, renal, cardiovascular, PCOS, menopause, thyroid health and autoimmune disorders.
In addition to receiving my B.S. in Dietetics from Baylor University, I completed my Masters in Dietetics from Sam Houston State, am a Board-Certified Diabetes Care and Education Specialist (CDCES) and received my certification in Adult Weight Management from the Academy of Dietetics. I am up to date with all weight loss medications on the market.
(855) 624-5438 View (855) 624-5438
Photo of Jill Sechi Mateus Milhomens, Nutritionist/Dietitian, RDN, LD, CEDS-C
Jill Sechi Mateus Milhomens
Nutritionist/Dietitian, RDN, LD, CEDS-C
Online Only
In the throws of an eating disorder? Struggling with a poor relationship with food? Has every diet you have been on failed? We are here to stand along side you to help you make peace with food. Achieving a balance of nutrition, exercise, stress management & self-care can be a challenge. Our team of experienced dietitians have blended their skills in wellness coaching and nutrition therapy in order to help others find this balance and achieve wellness. We only use evidence based practices and standards or care with all clients. Please give us a call or visit our website to see which dietitian would be the best fit for you.
In the throws of an eating disorder? Struggling with a poor relationship with food? Has every diet you have been on failed? We are here to stand along side you to help you make peace with food. Achieving a balance of nutrition, exercise, stress management & self-care can be a challenge. Our team of experienced dietitians have blended their skills in wellness coaching and nutrition therapy in order to help others find this balance and achieve wellness. We only use evidence based practices and standards or care with all clients. Please give us a call or visit our website to see which dietitian would be the best fit for you.
(303) 963-9455 x1 View (303) 963-9455 x1
Photo of Taylor Craven, Nutritionist/Dietitian, MS, RDN, CD, LDN
Taylor Craven
Nutritionist/Dietitian, MS, RDN, CD, LDN
1 Endorsed
Online Only
I am a Registered Dietitian Nutritionist who is transgender, queer, neurodivergent, and in long term recovery from my own eating disorders. I believe every client is truly unique and sees the world through their own lens. I strive to work from a weight inclusive and social justice stance. I believe in developing a strong therapeutic alliance with each client to work together toward lasting healing from disordered eating. Some of my core values include agency, informed consent, and intersectionality in understanding the roots of the eating disorder and the path to long term healing in a way that is authentic for each individual.
I am a Registered Dietitian Nutritionist who is transgender, queer, neurodivergent, and in long term recovery from my own eating disorders. I believe every client is truly unique and sees the world through their own lens. I strive to work from a weight inclusive and social justice stance. I believe in developing a strong therapeutic alliance with each client to work together toward lasting healing from disordered eating. Some of my core values include agency, informed consent, and intersectionality in understanding the roots of the eating disorder and the path to long term healing in a way that is authentic for each individual.
(970) 900-2868 View (970) 900-2868
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.