About Us · Heva + Dose

One practice. Two names.

Two names — Heva Health and Dose. One medical practice, one team, one standard of care.

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Heva Health · Dose Clinic · One team

Colby Stringham with his wife and their five kids in front of the Teton mountains

Why I started Heva

“Is this as good as it’s going to be?”

A few years ago, my wife woke me up in the middle of the night in tears and asked me a question I’ll never forget: “Is this as good as it’s going to be?” I was in my late thirties, traveling 80 nights a year and working hard to provide for our five kids. I thought everything was fine, but she felt disconnected. She felt like I’d stopped being affectionate and stopped noticing her.

My annual physicals had only ever covered the basics, so I finally got a deeper look. My testosterone was low. I hadn’t noticed any symptoms because I’d gotten used to a new normal. Optimizing my hormones didn’t change how much I loved my wife. It changed how naturally I could show it.

That experience showed me how hard it is to get the right care: limited testing, one-size-fits-all treatment, waitlists, canceled appointments, and follow-up that never happens. For my wife, it was even harder.

We built Heva Health so others don’t have to fight the system to feel like themselves again, with personalized care built on real data and a team that stays with you. We’re still growing and we’re not perfect, but everything we do comes from our own family’s experience: taking charge of our health so we can live the fullest lives possible for the people who matter most.

That’s where our name comes from. Heva is an ancient form of the name Eve, meaning life, living, and “mother of all living.” To us, it stands for vitality and the health we pass on to the next generation.

Colby Stringham, Founder & CEO

Who We Are

You may have noticed two names on your journey with us: Heva Health and Dose | Hormone & Longevity Center. Here's what you need to know.

Dose is our flagship clinic in Phoenix, Arizona — a full-service, in-person practice where our clinical team develops, tests, and refines every treatment protocol we offer. It's where our Chief Clinical Officer and care team practice daily, see patients, and do the deep work of root-cause, functional medicine.

Heva Health is how we bring that same clinical standard to patients across the country. Same protocols. Same team. Same standard of care — without requiring you to be in Phoenix to access it.

We are not a faceless telehealth company. We are a medical practice that decided the walls of a building shouldn't limit who we can help.

3,000+Patients Trusted
20+Years of Combined Clinical Experience
Full-SpectrumMetabolic · Hormones · Diagnostics · Allergies · Longevity
Board-CertifiedProviders

Our Approach

Treating the why — not just the symptom.

We practice naturopathic, functional, root-cause medicine. That means we look for the underlying mechanism behind a symptom — metabolic, hormonal, inflammatory, environmental — before we reach for a prescription.

Our clinical team works as a full-service concierge practice with access to the complete Heva pharmacy catalog and the full treatment library. There is no menu of three things. Whatever the patient needs, we have the depth and the breadth to deliver it.

What separates Heva from conventional telehealth is simple: depth of care, breadth of treatment access, and a team that treats the whole patient over time — not a transaction.

Protocol Development Center

Every Heva protocol starts at Dose.

Dose is the origin point for every treatment protocol Heva delivers nationally. Protocols are developed, clinically tested, and refined here at the bedside before they're ever deployed to patients across the country — the credibility bridge between in-person practice and the direct care model the rest of the country experiences.

  • Evidence-based methodology refined at the bedside before national rollout
  • Continuous outcomes tracking across the full patient population
  • Iterative protocol refinement informed by clinical results, not marketing

Meet the Clinical Team

The people behind every protocol.

Board-certified providers practicing full-spectrum medicine.

Dr. Caroline Tade

Dr. Caroline Tade, NMD

Chief Clinical Officer

  • Hormone Optimization
  • Regenerative Medicine
  • Chronic Disease
  • Peptide Therapy

Dr. Tade earned her Doctor of Naturopathic Medicine from Southwest College of Naturopathic Medicine, with certifications in IV nutrient therapy, prolotherapy, ozone therapy, peptide therapy, and bioidentical hormone replacement. She combines advanced medical techniques with patient-centered care — focusing on personalized treatment plans that blend evidence-based medicine with meaningful relationships and long-term outcomes.

Dr. Daniel Hall

Dr. Daniel Hall, DNP

Regenerative & Pain Medicine

  • Men's Health
  • Regenerative Injections
  • Pain Management
  • Sexual Health

With over two decades in healthcare, Dr. Hall earned his Doctor of Nursing Practice from Arizona State University in 2017, where he serves as Adjunct Faculty. He specializes in men's health and regenerative injection therapies, with advanced training in peripheral nerve blocks, joint injections, PRP, and sexual health treatments — combining precision procedural work with comprehensive, patient-centered care.

Kasey Horrell

Kasey Horrell, PA-C

Family & Functional Medicine

  • Women's Health
  • Pediatrics
  • Functional Medicine
  • Allergy & Sensitivity

Kasey graduated from Midwestern University-Glendale in 2016 and brings a holistic, integrative approach to family medicine — with specializations in women's health, pediatrics, and functional medicine. She emphasizes the mind-body connection, combining evidence-based care with personalized plans including stool analysis, organic acid testing, and allergy/sensitivity testing. As a mother of four, she empowers families to use natural therapies alongside conventional care.

Kelly Moore

Kelly Moore, FNP

Family Nurse Practitioner

  • Hormone Optimization
  • Thyroid Support
  • Weight Management
  • Whole-Body Wellness

A Family Nurse Practitioner with over 30 years in healthcare — 15 in advanced practice — Kelly specializes in hormone optimization, thyroid support, weight management, and whole-body wellness. Her own experience with Hashimoto's thyroiditis and perimenopause sparked a passion for integrative healing that values prevention, empowerment, and sustainable change — care that goes beyond the prescription pad to consider lifestyle, nutrition, stress, and mindset.

Our Care Network

National reach, with the same clinical standard.

Heva partners with a vetted national provider network to support asynchronous direct care visits, ensuring patients in all 50 states have access to licensed care. All network providers follow treatment protocols developed and maintained by the Heva clinical team.

Conditions We Treat

The full spectrum of root-cause medicine.

Metabolic Disease & Weight Loss

GLP-1 protocols, insulin resistance, and root-cause metabolic care.

Hormone Optimization

Includes thyroid, TRT, estrogen balance, and adrenal health.

Diagnostic Labs & Panels

Comprehensive functional and conventional labs with clinical interpretation.

Allergy Treatment

Identification and long-term management of environmental and food allergies.

Longevity & Preventive Care

Personalized prevention plans built on diagnostics, not guesswork.

And Much More

Not sure where to start? Book an appointment and we'll find the right path together.

Ready to work with our team?

Start with a short intake, or talk to a Treatment Coordinator who'll help you find the right starting point.

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