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Fountain care

Endocrinology

Hormonal health, understood in context.

Clinician-led hormonal care in New York City, combining your symptoms, medical history and lab findings to evaluate changes in energy, mood, sleep, sexual health, metabolism and body composition.

A connected view

The pattern matters more than a single lab test.

We look at your symptoms, health history and relevant hormone levels alongside factors such as metabolism, sleep, medications and life stage.

Your clinician interprets those findings together to understand what may be contributing to how you feel and which treatment path is clinically appropriate.

Conditions we address

Reasons patients come to us for hormonal care.

Hormonal changes can affect how you feel and function in different ways. We evaluate your symptoms alongside your medical history and labs to identify possible contributors and where care should focus.

  1. Perimenopause and menopause

    Care for hot flashes, sleep disruption, mood changes, brain fog and changes in body composition associated with the menopausal transition.

  2. Testosterone concerns

    Evaluation of testosterone levels and related symptoms when changes may be affecting energy, sexual health, strength, mood or body composition.

  3. Energy and recovery changes

    A wider look at hormonal, metabolic, sleep, and stress-related contributors to changes in energy, muscle, recovery or body composition.

  4. Menstrual and hormonal changes

    Evaluation of hormonal patterns associated with menstrual changes and related symptoms.

  5. Low libido and sexual health

    Clinical evaluation of hormonal and other health factors that can contribute to changes in libido and sexual function.

  6. Thyroid-related symptoms

    Evaluation of thyroid function when changes in energy, weight, mood, temperature tolerance, or menstrual patterns may be hormonally related.

Multidisciplinary care

Psychiatry, therapy, nutrition, endocrinology, sleep and more.

Root-cause approach

We look beyond symptoms to treat underlying drivers.

Measurable progress

Data-informed care to help you feel better and perform at a higher level.

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How care works

From symptoms to a personal care plan.

Your symptoms and hormone levels are interpreted in context, with treatment based on your individual health and clinical findings.

  1. 01

    Understand what you are experiencing

    We review your symptoms, health history, medications, life stage and the changes you've noticed.

  2. 02

    Evaluate your hormonal health

    Your clinician reviews relevant hormone levels and may recommend additional laboratory testing to better understand your clinical picture.

  3. 03

    Build your care plan

    Based on your evaluation, your plan may include medication, hormone therapy or other appropriate medical care.

  4. 04

    Monitor and refine

    We follow your symptoms and relevant biomarkers over time, adjusting treatment based on your response and changing needs.

Specific services, tests, and treatments depend on clinical eligibility and your clinician’s recommendations.

Your care team

Hormonal care, tailored to your clinical picture.

Physician, Functional Medicine & Longevity

Dr. Teets is a board-certified family physician and Mount Sinai faculty member bringing integrative and functional-medicine training to Fountain’s longevity care, connecting prevention, chronic disease, metabolic health, and long-term risk within one clinical view.

Physician, Internal Medicine & Hormonal Health

Dr. Klesaris brings more than two decades of internal-medicine experience to hormonal health, medically managed weight loss and age-management care.

Your clinician leads your care, with specialists in metabolic health, sleep, sexual health and other areas available when their expertise would be useful.

Common questions

About hormonal health care

What symptoms can hormonal changes cause?

Hormonal changes can affect many different systems in the body. Depending on the hormone involved, symptoms may include changes in energy, sleep, mood, anxiety, sexual function, menstrual cycles, temperature regulation, muscle mass, body composition, motivation, or concentration. These symptoms are not specific to hormones, however. Sleep disorders, medications, nutritional deficiencies, metabolic issues, mental health conditions, and other medical problems can cause similar symptoms. A thorough evaluation helps determine whether hormones are actually contributing and what else may need attention.

How is Fountain’s approach to hormonal health different?

We do not look at a hormone level in isolation. Hormonal health is closely connected with metabolism, sleep, mood, cognition, sexual health, nutrition, and body composition, so understanding one often requires looking at the others. Depending on your symptoms, Fountain may evaluate hormones alongside metabolic markers, nutritional status, medications, sleep, mental health, and other relevant health factors. When more than one area is involved, the appropriate specialists can work from the same clinical picture rather than treating each symptom separately. Fountain's broader care model is specifically designed to bring hormonal, metabolic, nutritional, cognitive, and mental-health information together into one coordinated plan. The goal is not simply to make a laboratory value higher or lower. It is to understand what may be contributing to how you feel and whether treatment produces a meaningful improvement in your health and functioning.

Can I have perimenopause symptoms even if my hormone blood tests are normal?

Yes. Hormone levels can fluctuate considerably during perimenopause, which means a single blood test does not always capture what is happening over time. Your clinician considers your symptoms, menstrual history, age, medical history, medications, and other relevant factors alongside laboratory testing. Symptoms such as changes in sleep, mood, menstrual cycles, temperature regulation, sexual health, or cognition may all help build the clinical picture. Testing can be useful, but it is one part of the evaluation rather than the only factor used to determine care.

What is the difference between HRT and “bioidentical” hormone therapy?

Hormone replacement therapy, or HRT, refers broadly to the use of hormones to treat symptoms or medical needs related to hormonal changes. The term “bioidentical” means that a hormone has the same chemical structure as a hormone naturally produced by the human body. It does not automatically mean the medication is compounded. There are FDA-approved estrogen and progesterone products that are considered bioidentical. The appropriate formulation, dose, and route depend on your symptoms, medical history, risk factors, and treatment goals rather than whether a product is marketed as “bioidentical.”

Can hormonal changes affect mood, anxiety, sleep, or brain fog?

Yes. Hormones interact with many of the systems involved in mood, sleep, cognition, energy, and stress response. Hormonal transitions such as perimenopause, menopause, or changes in testosterone can coincide with changes in anxiety, mood, sleep quality, concentration, motivation, and mental clarity. At the same time, we do not assume that these symptoms are hormonal simply because they occur together. Sleep problems, psychiatric conditions, medications, nutritional deficiencies, metabolic health, stress, and other medical factors may also contribute. Our approach is to look across those systems and determine which factors appear most relevant.

How do I know whether low testosterone is causing fatigue, low libido, or brain fog?

Symptoms such as fatigue, reduced libido, decreased strength, low motivation, or difficulty concentrating can occur with low testosterone, but symptoms alone cannot establish the diagnosis. Your clinician looks at your symptoms together with appropriately timed laboratory testing, medical history, medications, sleep, metabolic health, fertility goals, and other possible causes. If testosterone treatment is being considered, we also discuss the potential benefits, risks, and effects on fertility before deciding whether it belongs in your care plan.

How long does hormone therapy take to work?

There is no single timeline because different symptoms can respond at different rates. Some changes may become noticeable relatively early, while others can take longer and may require adjustments to dose, formulation, or the broader treatment plan. Before starting treatment, it is helpful to define what improvement should actually look like for you. Your provider can then follow symptoms, relevant laboratory markers, side effects, and other health measures over time to determine whether treatment is producing a meaningful benefit.

How does Fountain monitor hormone treatment over time?

Hormone treatment should be followed clinically, not managed by a single laboratory result. Depending on the therapy, monitoring may include symptoms, side effects, hormone levels, other laboratory markers, blood pressure, menstrual or sexual health, fertility considerations, metabolic health, and body composition. We compare those findings with how you are actually feeling and functioning. If your symptoms, laboratory results, health goals, or risk factors change, your treatment can be adjusted accordingly. The objective is not simply to reach a particular number on a lab report, but to achieve meaningful benefit while maintaining appropriate safety.

Clinically reviewed by

Last reviewed: October 2026

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