Advanced Gut Health Consultations

 Need some guidance on your gut health journey? Here’s where you get started.

Advanced Gut Health Consultations

 Need some guidance on your gut health journey? Here’s where you get started.

My background

I received my bachelor’s degree in Biology with honors from Kalamazoo College and my PhD in Nutritional Sciences from the University of Illinois at Urbana-Champaign, where my research centered on the impact of diet and exercise on gut microbiota in both health and disease.

For the past eight years, I’ve dedicated hours each week to independently studying the latest scientific literature, uncovering actionable insights for those struggling with gut issues. I’ve also had the privilege of working closely with Chris Kresser, a globally recognized leader in functional and integrative medicine, and served as a staff research associate for the Kresser Institute for Functional & Evolutionary Medicine.

While I’m not a doctor, my mission is to share the knowledge I’ve gained through my personal health journey, academic research, and independent study to empower you with the tools to improve your gut and overall health.

I may not have all the answers right away, but I promise to thoroughly explore the literature and provide you with the most evidence-based recommendations possible.

Lucy Mailing, PhD lab headshot
Lucy Mailing, PhD lab headshot

My background

I hold a bachelor’s degree in Biology with honors from Kalamazoo College and a PhD in Nutritional Sciences from the University of Illinois at Urbana-Champaign, where my research centered on the impact of diet and exercise on gut microbiota in both health and disease.

For the past eight years, I’ve dedicated hours each week to independently studying the latest scientific literature, uncovering actionable insights for those struggling with gut issues. I’ve also had the privilege of working closely with Chris Kresser, a globally recognized leader in functional and integrative medicine, and served as a staff research associate for the Kresser Institute for Functional & Evolutionary Medicine.

While I’m not a doctor, my mission is to share the knowledge I’ve gained through my personal health journey, academic research, and independent study to empower you with the tools to improve your gut and overall health.

I may not have all the answers right away, but I promise to thoroughly explore the literature and provide you with the most evidence-based recommendations possible.

Topics my clients often discuss with me

  • Digestive issues
  • Small intestinal bacterial overgrowth (“SIBO”)
  • Irritable bowel syndrome (IBS)
  • Chronic constipation/diarrhea
  • Inflammatory bowel disease (IBD)
  • Acid reflux/GERD
  • Autoimmunity
  • Autism spectrum disorder
  • Skin conditions
  • Food sensitivities or allergies
  • Microbiome testing

Topics my clients often discuss with me

  • Digestive issues
  • Small intestinal bacterial overgrowth (“SIBO”)
  • Irritable bowel syndrome (IBS)
  • Chronic constipation/diarrhea
  • Inflammatory bowel disease (IBD)
  • Acid reflux/GERD
  • Autoimmunity
  • Autism spectrum disorder
  • Skin conditions
  • Food sensitivities or allergies
  • Microbiome testing

What my clients say about me

“Lucy was a tremendous help and supportive partner in assisting in my teenage daughter’s recovery from a year and a half long battle with recurring C. difficile infection. Lucy’s recommendations on diet, supplementation, FMT and testing helped finally put an end to the horrible cycle of illness that the medical doctors could not fix with vancomycin alone. Lucy was extremely knowledgeable, responsive and a joy to work with. We are so grateful to have found her and are happy she is a pioneer in this VERY important work on the microbiome. Thank you so much Lucy!!!”

Lorraine C.

“I’ve struggled with gut and immune conditions for years. When I met Lucy, I had already tried dozens of Western medicine doctors and specialists, holistic and integrative medicine specialists, and countless tests. After one consultation with Lucy and following her advice regarding my diet and lifestyle, my health is better than it has been in years. I believe this is due to the first principles approach Lucy employed when understanding my situation and her unique combination of skills. Lucy embodies the best aspects of a researcher conducting cutting-edge science and an evidence-based practitioner digging to the root of her clients’ problems. This combination is extremely difficult to find and, I believe, particularly powerful for intractable health conditions like mine.”

Cullen M.

“I am a PhD student studying the human gut microbiome. I am also an Associate Registered Nutritionist. I have heard Lucy talk on the Nourish Balance Thrive podcast, and I have followed her work for a while. She is one of the most objective, true speaking nutritionists and researchers I have come across. This is not an easy field to be a part of, new research is constantly breaking our established knowledge and foundations, but Lucy is honest and up to date. I trust her views and advice. Thanks Lucy for your genuineness, and the time that goes into your research.”

Laura P.

What my clients say about me

“Lucy was a tremendous help and supportive partner in assisting in my teenage daughter’s recovery from a year and a half long battle with recurring C. difficile infection. Lucy’s recommendations on diet, supplementation, FMT and testing helped finally put an end to the horrible cycle of illness that the medical doctors could not fix with vancomycin alone. Lucy was extremely knowledgeable, responsive and a joy to work with. We are so grateful to have found her and are happy she is a pioneer in this VERY important work on the microbiome. Thank you so much Lucy!!!”

Lorraine C.

“I’ve struggled with gut and immune conditions for years. When I met Lucy, I had already tried dozens of Western medicine doctors and specialists, holistic and integrative medicine specialists, and countless tests. After one consultation with Lucy and following her advice regarding my diet and lifestyle, my health is better than it has been in years. I believe this is due to the first principles approach Lucy employed when understanding my situation and her unique combination of skills. Lucy embodies the best aspects of a researcher conducting cutting-edge science and an evidence-based practitioner digging to the root of her clients’ problems. This combination is extremely difficult to find and, I believe, particularly powerful for intractable health conditions like mine.”

Cullen M.

“I am a PhD student studying the human gut microbiome. I am also an Associate Registered Nutritionist. I have heard Lucy talk on the Nourish Balance Thrive podcast, and I have followed her work for a while. She is one of the most objective, true speaking nutritionists and researchers I have come across. This is not an easy field to be a part of, new research is constantly breaking our established knowledge and foundations, but Lucy is honest and up to date. I trust her views and advice. Thanks Lucy for your genuineness, and the time that goes into your research.”

Laura P.

Frequently Asked Questions

Why should I work with you?

Navigating the sea of misinformation out there can be overwhelming. It took me years of diving deep into medical and nutrition research to regain my own health, and now I’m committed to sharing what I’ve learned to help you on your journey. With a background in nutritional sciences and extensive experience in functional and integrative medicine, I’m here to provide you with the reliable, evidence-based guidance you need to regain your health—without the confusion and uncertainty.

I spend hours each week reviewing the latest scientific literature to ensure my recommendations are as accurate and effective as possible. I understand how challenging it is to live with a chronic health condition because I’ve been there myself. I know the frustration, the embarrassment, and the moments of feeling completely lost. That’s why I’m here to listen, support you without judgment, and truly care about your well-being.

You deserve a genuine advocate for your health. I’m passionate about providing personalized care while also meticulously analyzing the data to uncover the root cause of your issues. While I can’t promise to have all the answers, I can promise to work tirelessly to find them. My goal is always to back my recommendations with solid evidence, giving you the confidence and clarity you need to move forward.

Are your consults online or in-person?

All consults are virtual, conducted via Zoom audio.

How much should I expect this to cost?

My hourly rate for consultations is $700. This reflects the extensive research, personalized attention, and expertise I bring to each session. While I currently offer only full-hour consultations, I’m considering adding shorter sessions in the future.

I’m deeply committed to making integrative gut health accessible to everyone. While consultations are a significant investment, they directly support the development of more affordable, evidence-based gut health courses and free resources on my blog. These efforts are designed to help a broader audience access the guidance they need, regardless of budget.

Are the consultations covered by insurance?

Unfortunately, my consultations are not covered by insurance, as I am not a licensed medical doctor. However, you will receive a receipt that may help you claim reimbursement if your insurance covers consultations with a non-licensed provider. For lab tests, some may be partially covered if prescribed by your physician.

How should I prepare before our consultation?

To make the most of our time together, it’s helpful to gather any relevant medical records, lab results, or a detailed history of your symptoms. When you book your consult, you’ll have the opportunity to send me up to three recent lab tests. If I think it will be helpful, I may request to see others during our call.

What can I expect during our consultation?

During our consultation, we’ll start by discussing your health history, current symptoms, and health goals. I’ll then review any relevant labs and provide you with personalized recommendations based on the latest scientific research. We’ll also explore next steps and any follow-up that might be needed.

Can you order or suggest specific lab tests? 

As I’m not a licensed MD, I can’t order lab tests directly. However, during our consultation, we’ll discuss which tests might be most beneficial for you, and you can order them through your physician or direct-to-consumer.

For those interested in assessing gut health, I recommend the following tests:
1) Genova GI Effects Comprehensive Stool Profile (available through directlabs.com) for clinical markers and a broad overview of the microbiome, and

2) A metagenomic gut test such as TinyHealth for a deeper dive into the gut microbiome, if finances allow.

If you already have results from other tests, I’m happy to review those as well. Please note that I have no affiliations with any testing companies; these recommendations come from my own experiences working with clients and reviewing hundreds of stool tests.

Will your suggestions involve supplements?

In some cases, we may discuss supplements that could be beneficial. I have no affiliations with any supplement manufacturers, so any brands or products I recommend are solely based on my independent research and evaluation of their quality and effectiveness.

How long will it take to see results?

The timeline for seeing results varies depending on the complexity of your condition and how closely you follow the recommendations. Some clients notice improvements within a few weeks, while others may take longer. We’ll discuss realistic expectations for your specific case during our consultation.

I am a pretty complex case, will you be able to help me? 

While it’s unlikely that we’ll solve a long-standing health problem in a single appointment, I can usually provide a fresh perspective or new direction to explore. More than half of my clients have complex cases, and I’m experienced in working with such challenges. If I’m unable to offer any new insights or assistance, I’ll happily refund your payment in full.

Do you collaborate with other healthcare providers?

Yes, I’m happy to collaborate with your healthcare providers to ensure a cohesive approach to your care. Communication between practitioners can be crucial in managing complex health issues, and I’m open to working alongside your existing medical team.

How do I follow up after our consultation?

After our consultation, you’re welcome to book additional sessions if needed. While I don’t currently offer ongoing email support, I’m always available for follow-up consultations to reassess and refine your health plan as needed.

If you’re seeking more personalized, ongoing guidance, I also offer a limited number of spots in my Premium Retainer Program, which provides frequent, in-depth support. We can discuss if this might be a good fit for you during your consultation.

Do you offer email support?

At this time, I’m unable to provide email support to clients. My focus is on staying current with the latest research and creating valuable content to help as many people as possible. This often requires time away from my inbox. If you need additional guidance, please feel free to book another appointment via my calendar.

How do I know if your approach is right for me?

My approach is ideal for those seeking evidence-based, personalized guidance on gut health. If you’re struggling with chronic issues, looking for a fresh perspective, or want to dig deeper into the root causes of your health problems, my consultation services could be a good fit.

Book a Consultation

  • New Clients: We will explore your case history and background, review any labs, discuss potential root causes of your symptoms and cover my evidence-based initial recommendations.

  • Returning Clients: We will review recent progress, analyze any new lab data, and adjust your protocol to keep you moving forward.

Please select your preferred time below.


I look forward to connecting with you soon!

Frequently Asked Questions

Why should I work with you?

Navigating the sea of misinformation out there can be overwhelming. It took me years of diving deep into medical and nutrition research to regain my own health, and now I’m committed to sharing what I’ve learned to help you on your journey. With a background in nutritional sciences and extensive experience in functional and integrative medicine, I’m here to provide you with the reliable, evidence-based guidance you need to regain your health—without the confusion and uncertainty.

I spend hours each week reviewing the latest scientific literature to ensure my recommendations are as accurate and effective as possible. I understand how challenging it is to live with a chronic health condition because I’ve been there myself. I know the frustration, the embarrassment, and the moments of feeling completely lost. That’s why I’m here to listen, support you without judgment, and truly care about your well-being.

You deserve a genuine advocate for your health. I’m passionate about providing personalized care while also meticulously analyzing the data to uncover the root cause of your issues. While I can’t promise to have all the answers, I can promise to work tirelessly to find them. My goal is always to back my recommendations with solid evidence, giving you the confidence and clarity you need to move forward.

Are your consults online or in-person?

All consults are virtual, conducted via Zoom audio.

How much should I expect this to cost?

My hourly rate for consultations is $700. This reflects the extensive research, personalized attention, and expertise I bring to each session. While I currently offer only full-hour consultations, I’m considering adding shorter sessions in the future.

I’m deeply committed to making integrative gut health accessible to everyone. While consultations are a significant investment, they directly support the development of more affordable, evidence-based gut health courses and free resources on my blog. These efforts are designed to help a broader audience access the guidance they need, regardless of budget.

Are the consultations covered by insurance?

Unfortunately, my consultations are not covered by insurance, as I am not a licensed medical doctor. However, you will receive a receipt that may help you claim reimbursement if your insurance covers consultations with a non-licensed provider. For lab tests, some may be partially covered if prescribed by your physician.

How should I prepare before our consultation?

To make the most of our time together, it’s helpful to gather any relevant medical records, lab results, or a detailed history of your symptoms. When you book your consult, you’ll have the opportunity to send me up to three recent lab tests. If I think it will be helpful, I may request to see others during our call.

What can I expect during our consultation?

During our consultation, we’ll start by discussing your health history, current symptoms, and health goals. I’ll then review any relevant labs and provide you with personalized recommendations based on the latest scientific research. We’ll also explore next steps and any follow-up that might be needed.

Can you order or suggest specific lab tests? 

As I’m not a licensed MD, I can’t order lab tests directly. However, during our consultation, we’ll discuss which tests might be most beneficial for you, and you can order them through your physician or direct-to-consumer.

For those interested in assessing gut health, I recommend the following tests:
1) Genova GI Effects Comprehensive Stool Profile (available through directlabs.com) for clinical markers and a broad overview of the microbiome, and

2) A metagenomic gut test such as TinyHealth for a deeper dive into the gut microbiome, if finances allow.

If you already have results from other tests, I’m happy to review those as well. Please note that I have no affiliations with any testing companies; these recommendations come from my own experiences working with clients and reviewing hundreds of stool tests.

Will your suggestions involve supplements?

In some cases, we may discuss supplements that could be beneficial. I have no affiliations with any supplement manufacturers, so any brands or products I recommend are solely based on my independent research and evaluation of their quality and effectiveness.

How long will it take to see results?

The timeline for seeing results varies depending on the complexity of your condition and how closely you follow the recommendations. Some clients notice improvements within a few weeks, while others may take longer. We’ll discuss realistic expectations for your specific case during our consultation.

I am a pretty complex case, will you be able to help me? 

While it’s unlikely that we’ll solve a long-standing health problem in a single appointment, I can usually provide a fresh perspective or new direction to explore. More than half of my clients have complex cases, and I’m experienced in working with such challenges. If I’m unable to offer any new insights or assistance, I’ll happily refund your payment in full.

Do you collaborate with other healthcare providers?

Yes, I’m happy to collaborate with your healthcare providers to ensure a cohesive approach to your care. Communication between practitioners can be crucial in managing complex health issues, and I’m open to working alongside your existing medical team.

How do I follow up after our consultation?

After our consultation, you’re welcome to book additional sessions if needed. While I don’t currently offer ongoing email support, I’m always available for follow-up consultations to reassess and refine your health plan as needed.

Do you offer email support?

At this time, I’m unable to provide email support to clients. My focus is on staying current with the latest research and creating valuable content to help as many people as possible. This often requires time away from my inbox. If you need additional guidance, please feel free to book another appointment via my calendar.

How do I know if your approach is right for me?

My approach is ideal for those seeking evidence-based, personalized guidance on gut health. If you’re struggling with chronic issues, looking for a fresh perspective, or want to dig deeper into the root causes of your health problems, my consultation services could be a good fit.

Book a Consultation

  • New Clients: We will explore your case history and background, review any labs, discuss potential root causes of your symptoms and cover my evidence-based initial recommendations.

  • Returning Clients: We will review recent progress, analyze any new lab data, and adjust your protocol to keep you moving forward.

Please select your preferred time below.


I look forward to connecting with you soon!