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Welcome to Sheehan Natural Health! Your friendly, neighborhood holistic and Functional Medicine doctors!

About Dr. Sheehan

Doctor of Chiropractic

  • Specialty: Chiropractic & Nutrition
  • Education: Bachelors in Science, Doctorate of Chiropractic, ACT Level 9 Nutrition Response TestingSM
  • Trained in Functional Medicine at the Kresser Institute
  • Years in practice: 23

What makes holistic and Functional Medicine doctors different from other doctors? I’m Dr. Keith Sheehan, a chiropractor and holistic practitioner. When I was 17, I hurt my back playing soccer. My pain was so severe that I could barely stand. My family’s chiropractor (who I had been too scared to go see before that time) was Dr. Tom LaRosa in Pine Bush, N.Y. He have me an adjustment , and just like that, I was cured. I was able to walk out of the office like the pain never existed. He explained that there was a bone slightly out of place in my lower back, that was causing the pain, and all he did was put it back in place. That made so much sense to me, that I asked him, “Why doesn’t everybody do that?” And he answered, “I don’t know!” This encounter inspired me to become a chiropractor.

Several years later, after I had received an ulcerative colitis diagnosis, I got a severe Salmonella infection. The doctor told me that it would be self-limiting infection, and I believed him. But about a month later, I still wasn’t feeling right, and started to feel pain in my lower back. Since I was going to chiropractic school in a couple months, I decided to see the local chiropractor to get my back adjusted. It didn’t help. I asked him why the adjustments weren’t helping and he said he did not know, but that when I went to chiropractic school, they would x-ray me and give me lab tests to figure out the cause of my chronic pain. Little did I know, but a dysfunction of the large intestine often causes pain in the lower back and hips.

When I got to chiropractic school, I thought for sure that someone there would figure out why I had chronic pain in my left low back, had gained 10 inches on my waist, had chronic fatigue, and had developed acne (something I had never had before). I went to five clinicians, the dean of clinics, the president of the school, and multiple other doctors for advice over the next three years. Eventually I came to the conclusion that no one could help me. At 24 years of age, I was crippled in pain, was fatigued, had chronic indigestion and ulcerative colitis. I had growing anxiety and depression about my failing health, and I was in quite a pickle. Little did I know though, my luck was about to change-yay!

You see, one of my friends told me about a book called “The Zone” by Dr. Barry Sears, which talks about blood sugar disturbances and the foods that cause them. This book deeply resonated with me and I realized that when I ate the foods that he cautioned against, I didn’t feel good, my bloating and gas acted up, and so did my pain. Because of this I decided to try the diet that he recommended, which is very much like the diet that I recommend now to people, the Paleo diet.

Within one week, my crippling back pain stopped. Within two months, my digestive tract completely healed, my acne vanished, and I had so much energy that I needed about two hours less sleep during the night. I lost about 40 pounds of fat, and 10 inches off my waist. As a side note, my allergies and asthma also left. All of this from diet, who knew?

When I got out into practice as a chiropractor, I thought I was the only one who needed a serious diet change. But I noticed something curious. Only about 50% of my patients responded miraculously to my chiropractic adjustments, feeling better quickly. The other 50% either got better slowly or did not get better at all. When I asked them about their diet, I found that most of them were eating things that they should not be eating, that were affecting their digestion and keeping them from improving. You see, patients also had digestive and other sorts of problems that were affecting their health, and causing pain in their body (as I had).

As a chiropractor, I decided not to focus solely on the spine, but the whole health of the body. That is how I started practicing therapeutic nutrition and became a functional medicine doctor, to help people get to the root cause of their health problems.

My health issues were related to my digestion because of food poisoning and chronic immune system problems. What I have discovered with my patients is that serious issues are sometimes missed–such as hormonal imbalances, blood sugar issues, chronic infections, chemical and heavy metal toxicities..the list goes on and on. If you can get to the root of the issue, and that is what I specialize in, almost any health problem can heal.

About Laura Sheehan

Master of Science in Applied Clinical Nutrition

  • Nutrition Response Testing
  • Advanced Practitioner
  • Licensed Massage Therapist

Laura Sheehan is a certified Nutrition Response Testing™ practitioner and a licensed massage therapist. She is a Lancaster County native and attended Millersville University, receiving her Bachelor of Arts in 1997. Laura has always been passionate about nutrition and health. She embraced Nutrition Response Testing when she began seeing Dr. Sheehan in 1998 and her severe chronic health issues resolved 100% under his care.

Over the next 20 years, she learned as much as she could about Whole Food Supplementation, Designed Clinical Nutrition, and Functional Medicine. She is fascinated with alternative medicine and Functional Medicine doctors’ approach to healing. Laura currently practices Nutritional Therapy and Functional Medicine at the Lancaster, PA office and in her own private practice in Kinzers, PA.