Information About Working
with Mast Cell 360.
PLEASE READ CAREFULLY.
Thank you for your interest in Mast Cell 360!
We are a remote consulting practice. Our practitioners do not diagnose, treat, or prescribe. This means you still need to be under the care and supervision of your local medical provider while working with Mast Cell 360 practitioners. You can read more about our practitioners below.
Who We Work With:
People dealing with Mast Cell Activation Syndrome and Histamine Intolerance, along with related conditions such as:
- Mold Toxicity
- Sensitivities
- Chronic Fatigue
- Salicylate Intolerance
- Neuroinflammation
We are unable to work with those who are:
- Pregnant
- Breastfeeding
- Under 3 years of age
- Undergoing chemotherapy treatment
- Have medical complications outside the skill level of our practitioners
At this time, we are only able to serve clients located in the lower 48 United States.
Costs:
All expenses are out-of-pocket. Mast Cell 360 services are not billable to insurance nor can we
provide superbills due to the nature of the practice.
Applying to the Mast Cell 360 Practice
The Mast Cell 360 practice is a long-term program. We do not offer single appointments or
consultations.
If you are interested in working with a Mast Cell 360 practitioner, you will need to apply to the practice.
The application process helps us determine if the practice might be a good fit for you. We do this because we want everyone to be able to use their resources in the way that will best serve their needs.
While we have great success rates, online healthcare consulting isn’t right for every case. We want you to be sure you’re in the right place. We don’t want anyone to lose time or money if we can’t help.
Because of this, we will let you know whether we believe your case is a good fit for what we offer in the practice.
Submitting an application does not place you on a waiting list or guarantee an appointment. It is the first step of the process to apply to the Mast Cell 360 practice.
Please note that the application review time can take a few weeks due to the high number of applications we receive. If you are accepted into the practice, the next appointment availability might be anywhere from 1-4 months out, depending on current demand and availability of our practitioners.
The Application Process:
We are currently accepting applications. Please review the application process below carefully as it will answer many of the questions you may have.
- Click the button below to fill out the pre-screening.
- If you meet the pre-screening criteria, you will be shown a button to fill out application. Please complete the application and submit when done.
- Please note that we receive a large number of applications. It can take our team 1-3 months to review your application once it’s received, depending on current demand.
- Once your application is reviewed, you will receive an email from us.
- If upon review of your application, we consider your case to be outside the scope of our practice, we will let you know so you can explore other options.
- If upon review of your application it looks like you might be a good fit for the practice, you will be sent the intake packet. The intake packet will need to be completed and returned within one week from the date it was sent to you.
- Once the intake packet has been reviewed, we will contact you to either schedule an appointment or notify you that you are on the official waiting list.
- Please note that new initial appointment availability can be 3-4 months out, depending on the number of applications we’re working through.
You can get a head-start by taking our online courses.
These courses cover the foundation steps of the Mast Cell 360 practice:
WARNING:
FOR THOSE WHO ARE CURRENT CLIENTS:
If you are a current client applying for a family member, you MUST log out of your PracticeBetter client portal before filling out the application.
Click Here to check first (link opens in a new window).
If you are logged into your existing PracticeBetter client portal account, when you fill out the application for a family member, the new application date will overwrite your client file, and we also won’t receive the application. Thank you for helping us with this!
Our Practitioners

Beth O’Hara, Mast Cell 360 Clinic Director
Beth O’Hara is a Functional Naturopath Consultant and the Clinic Director for Mast Cell 360. She directs the Mast Cell 360 clinic, providing direction, mentorship, and support for our practitioners on every case.
She designed Mast Cell 360 to be the kind of practice she wished had existed when she was severely ill with Mast Cell Activation Syndrome, Histamine Intolerance, Mold Toxicity, Neural Inflammation, Lyme, Fibromyalgia, and Chronic Fatigue.
Being unable to walk, bedridden, and plagued with severe fatigue, pain, and anxiety, she was at the end of her rope. After decades of battling, she had exhausted what both traditional and holistic healthcare could offer.
Through bridging a deep knowledge of biochemistry, genetics, and functional naturopathic approaches, she was able to heal.
She went on to develop the MC360TM method which is used exclusively by the practitioners at Mast Cell 360 to build personalized, effective roadmaps for healing. Her method has now helped thousands of people with Mast Cell Activation Syndrome, Mold Toxicity, and sensitivities to regain their lives, their hopes, and their dreams.
Her education and training include:
- Mentoring and training by Dr. Neil Nathan and Jill Crista in Mold Toxicity, Tickborne Illnesses, and other complex conditions
- Certified in Functional Genomic Analysis
- Doctorate in Functional Naturopathy
- Master’s degree in Marriage and Family Therapy
- Bachelor’s degree in Physiological Psychology
She is also a Research Adviser for the Nutrigenetic Research Institute. She presents at Functional Medicine Conferences and graduate educational institutions on Mast Cell Activation Syndrome and Mold Toxicity as well as the use of genetics and biochemistry in addressing chronic health conditions.
Her mission today is to be a guiding light for others with Mast Cell Activation Syndrome, Histamine Intolerance and these related conditions in their healing journeys.

Leslie Evelo, PhD, Emotional Support Coaching
Leslie Evelo, Ph.D. provides emotional support to clients who are dealing with the stress and nervous system consequences of MCAS and related conditions. She uses breathing, mindfulness, guided meditation, and other techniques to soothe the nervous and limbic systems. She also helps clients with problem solving and decision-making challenges that can be a part of MCAS and Mold Toxicity.
Leslie also offers a tool called the Safe and Sound Protocol (SSP), a system that uses sound to promote a sense of safety. Many people with MCAS and related conditions have never felt safe enough to heal due to trauma and life challenges that have kept their nervous systems on “high alert.” SSP delivers specially filtered sound that helps soothe the nervous system so that the body can focus on healing.
Leslie has experienced Histamine Intolerance, environmental sensitivities, and Mold Toxicity. She also understands the impact that MCAS, fibromyalgia, chronic fatigue, Lyme disease, and related conditions have on clients’ lives.
Leslie’s education and training include:
- 20+ years in private practice and 10+ years working in mind-body medicine
- Training and experience working with clients with chronic illness and health challenges
- Extensive training and experience in mindfulness and meditation
- Extensive training and experience working with trauma with mind-body based approaches
- Ph.D. in Counseling Psychology
- Master’s Degree in Counseling
- Bachelor’s Degree in Psychology and French Education
Leslie’s focus is on helping people’s minds and bodies to work in harmony toward healing, self-compassion, and balance.
What Our Clients Say



