Alternative medicine practitioner

Your body feels tired even after a full night's sleep, and you've been dealing with digestive issues that won't go away. Traditional doctors keep running the same tests and prescribing medications that only mask the symptoms. Natural Root Cause handles functional medicine consultations in Delhi, OH that dig deeper to find what's actually causing your chronic health problems.

Why You Can Trust Us

Chronic health problems that started gradually over months or years often have root causes that standard medical tests miss. You might be dealing with digestive issues that began after antibiotics, fatigue that started during a stressful period, or autoimmune symptoms that flare unpredictably. These conditions typically involve nutrient deficiencies, hormone imbalances, food sensitivities, or toxin buildup that don't show up on basic blood panels.

You can't get through your day without feeling drained by 2 PM. Simple foods cause bloating or stomach pain. Your sleep is restless even when you're exhausted. Other doctors dismiss your symptoms or want to put you on medications that cause side effects without fixing the real problem. You're stuck managing symptoms instead of getting better.

Natural Root Cause runs comprehensive functional medicine labs that test for nutrient levels, food sensitivities, hormone patterns, and toxic load. Natural Root Cause analyzes these results to identify the specific imbalances causing your symptoms, then creates a treatment plan using bio-identical hormones, targeted supplements, dietary protocols, and natural therapies. Follow-up visits track your progress and adjust treatments as your body heals. Lab work and treatment protocols are separate from the initial consultation.

You'll have energy that lasts through the day without crashes. Your digestive system will handle foods that used to cause problems. Sleep will be restful and your mind will be clear. You'll understand what was making you sick and have a plan to stay healthy long-term.

Our process

1. 1
   Complete health history review

   Natural Root Cause reviews your full health timeline, symptoms, and previous test results during a detailed consultation.
2. 2
   Advanced laboratory testing

   Natural Root Cause orders specialized functional medicine labs that check for nutrient deficiencies, food sensitivities, hormone imbalances, and toxin levels.
3. 3
   Root cause analysis

   Natural Root Cause analyzes your test results to identify the underlying triggers causing your chronic symptoms.
4. 4
   Personalized treatment plan

   Natural Root Cause creates a custom protocol using bio-identical hormones, targeted nutrients, dietary changes, and natural therapies.
5. 5
   Ongoing monitoring

   Natural Root Cause tracks your progress with follow-up appointments and adjusts treatments based on how your body responds.

Why Choose Us

• Formally trained functional medicine providers
• Advanced specialty lab testing not available through regular doctors
• Bio-identical hormone therapy and IV nutrient therapy on-site
• Treatment plans for autoimmune conditions and cancer support

Our team

Keith Tenhundfeld

FNP

Keith Tenhunfeld's journey into medicine began in 1993, and from the very start he was drawn to something deeper than the standard model of care. Over more than three decades, he pursued nursing, advanced practice, and a wide range of integrative therapies — building the kind of well-rounded clinical perspective that comes only from years of genuine curiosity and hands-on experience. As a certified Family Nurse Practitioner, Keith has long believed that true healing requires addressing the whole person — body, mind, heart, and soul — not just the chief complaint. His patients often describe him as the provider who finally listened, and who gave them hope when no one else could.

Sara Aicken

PA-C

Sara Aicken is a Physician Assistant with 17 years of clinical experience and a genuine passion for care that goes beyond the conventional. A graduate of the Medical University of South Carolina's PA program, she has earned advanced certification in functional medicine and bio-identical hormone therapy through Worldlink Medical, and has brought healthcare to underserved communities in rural Alaska, Idaho, and on medical mission trips to Haiti, Africa, and South America. Sara excels at thinking beyond the surface — helping patients reclaim energy, balance hormones, and add real quality to their years. When she's not in the clinic, she's on her homestead in Harrison, Ohio, tending bees, chickens, and a garden alongside her husband and kids.

Trent Austin

MD

Dr. Trent Austin is a board-certified physician whose path to functional medicine began with a deeply personal wake-up call — when standard prescriptions for his own elevated blood pressure and cholesterol left him feeling worse, not better, he started asking better questions. Watching his parents navigate chronic illness through a system focused on managing symptoms rather than finding answers only deepened that resolve. Today, Dr. Austin blends his conventional medical training with a genuine passion for root-cause healing, specializing in chronic conditions like Alzheimer's, dementia, depression, and diabetes. He's a lifelong learner who believes the best medicine happens at the intersection of science, nature, and truly knowing each patient's story.

Frequently asked questions