Our physicians excel at determining the fundamental reasons underlying the symptoms their patients are experiencing, through applying Functional Medicine. The practice of Functional Medicine requires that careful attention be paid to the details that make up YOU.

What to Expect

Your first visit to our Clinic will be 1 ½ to 2 hours in length, significantly longer than the standard medical evaluation. This extra time provides us the luxury of being able to take a complete history, review past medical records and perform a physical exam. After gathering this crucial information, we will work together to determine the underlying causes for your health challenges.

Together, we will generate a timeline of your life, which will incorporate family history, health history, and the significant events which have affected you during your lifetime. This is essential for determining the root causes of your conditions and symptoms. We will then create a personalized “map” of treatment that will enable you to restore and optimize your health.

This treatment plan will incorporate many facets, including laboratory evaluation, a customized nutritional plan, supplements and/or appropriate medications and lifestyle recommendations.

Our staff will assist you with coordinating your treatment program- every step of the way. This includes a consult with our board-certified Nutrition Team, who will carefully assist you in implementing your individualized nutritional plan.

Our Physicians

Physician, Clinic Director

Dr. Fitzgerald received her doctorate of naturopathic medicine from National College of Natural Medicine in Portland, Oregon.

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Kenneth A. Litwin, MD FACP IFMCP, is a highly respected, board-certified Internal Medicine and Functional Medicine physician.

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Darisa Espinal, ND, MS, received her doctorate in Naturopathic Medicine at the University of Bridgeport. She earned her BS in Biology from the University of Hartford and completed her Master of Science in Human Nutrition from the University of Bridgeport. She is currently licensed as a naturopathic physician in the State of Connecticut.

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We take the time to understand your individual health goals, which (in addition to addressing chronic diseases) may include optimal wellness and healthy aging, and use those to directly frame our work together.

Conditions Supported by Functional Medicine


A chronic condition including attention difficulty, hyperactivity, and impulsiveness.


Conditions in which the immune system reacts abnormally to a foreign substance.


Also colloquially known as male menopause — is said to be the result of a gradual drop in testosterone, which is an androgen.

Apthous Stomatitis

A small, shallow sore inside the mouth or at the base of the gums.

Atopic Dermatitis

Atopic Dermatitis is an itchy inflammation of the skin.

Autoimmune Disease

A disease in which the body’s immune system attacks healthy cells.

Burning Mouth Syndrome

(BMS) is an idiopathic condition characterized by a continuous burning sensation of the mucosa of the mouth

Cancer Support and Prevention

An estimated two-thirds of all cancers are preventable. Information and education are key to cancer prevention

Cardiac Disease Prevention & Risk Reduction

A disease in which abnormal cells divide uncontrollably and destroy body tissue.

Chronic Constipation/Diarrhea

A common condition that is characterized by difficult, infrequent, or perceived incomplete evacuation of bowel movements.

Chronic Fatigue Syndrome

A disease characterized by profound fatigue, sleep abnormalities, pain, & other symptoms that are made worse by exertion.


A condition in which there is difficulty in emptying the bowels, usually associated with hardened feces.


A mood disorder causing a persistent feeling of sadness and loss of interest.


A group of diseases that result in too much sugar in the blood, or high blood glucose.


A disorder in which tissue that normally lines the uterus grows outside the uterus.

Environmental Toxicity

Understanding of the harmful effects of various chemical, biological and physical agents on living organisms.


Widespread muscle pain and tenderness. Fibromyalgia affects an estimated 5.8 million Americans.

Food Allergies/ Intolerances

An unpleasant or dangerous immune system reaction after a certain food is eaten.

Gastro Esophageal Reflux Disease

A digestive disease in which stomach acid or bile irritates the food pipe lining.

Gastrointestinal Disorders

Irritable Bowel Syndrome (IBS) A number of factors can trigger IBS including certain foods, medicines, and emotional stress.

Gluten Sensitivity

An immune reaction to eating gluten, a protein found in wheat, barley, and rye.


A condition in which the force of the blood against the artery walls is too high.


A condition in which the thyroid gland doesn’t produce enough thyroid hormone.

Infectious Diseases

Caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the diseases can be spread.

Inflammatory Bowel Disease

Ongoing inflammation of all or part of the digestive tract.


Persistent problems falling or staying asleep or both.

Intestinal Permeability (Leaky Gut)

Intestinal permeability is the phenomenon of the gut wall in the gastrointestinal tract exhibiting permeability.

Irritable Bowel Syndrome

An intestinal disorder causing pain in the belly, gas, diarrhea, and constipation.

Lead Toxicity

Also called plumbism is a buildup of lead in the body, usually over months or years.


Common symptoms include hot flashes and vaginal dryness and possibly sleep disturbances. The combination of these symptoms can cause anxiety or depression.

Mercury Toxicity

Inorganic mercury toxicity often causes skin rashes and inflammation (dermatitis)

Metabolic Syndrome

A cluster of conditions that increases the risk of heart disease, stroke, and diabetes.


A headache of varying intensity, often accompanied by nausea and sensitivity to light and sound.

Mitochondrial Dysfunction

A group of disorders caused by dysfunctional mitochondria, the organelles that generate energy for the cell.

Mood Disorders

A psychological disorder characterized by the elevation or lowering of a person’s mood, such as depression or bipolar disorder.

Multiple Sclerosis

A disease in which the immune system eats away at the protective covering of nerves.

Muscle Spasms

A sudden and involuntary contraction of one or more of your muscles.

Neurodevelopmental Degenerative Disorders

A group of disorders in which the development of the central nervous system is disturbed


A disorder involving excessive body fat that increases the risk of health problems.


Reduced bone mass of lesser severity than osteoporosis.


A condition in which bones become weak and brittle.

Polycystic Ovary Syndrome

A hormonal disorder causing enlarged ovaries with small cysts on the outer edges.

Premenstrual Syndrome

A group of symptoms that occur in women, typically between ovulation and a period.

Prostate Health

There is a lot you can do to keep your prostate healthy as you age—and stay ahead of the game

Psoriatic Arthritis

A form of arthritis that affects some people who have the skin condition psoriasis.

Rheumatoid Arthritis

A chronic inflammatory disorder affecting many joints, including those in the hands and feet.


A condition in which the cavities around the nasal passages become inflamed.

Stress Related Anxiety

Stress can be triggered by an event that makes you feel frustrated or nervous.

Stress Related Fatigue

Emotional, or physical stress drains the adrenal glands and causes many common symptoms.

Thyroid Disease

Any dysfunction of the butterfly-shaped gland at the base of the neck (thyroid).

Viral Syndromes

A term caregivers use for general symptoms of a viral infection that has no clear cause.

Vitamin Deficiencies

Vitamin Deficiencies is a deficiency of one or more of the bodies essential vitamins.

Yeast Infections

A fungal infection typically on the skin or mucous membranes caused by candida.