Fatigue & Low Energy Specialists on Long Island

Fatigue that doesn’t improve with rest isn’t just tiredness. When you’re sleeping enough, eating reasonably, and still dragging through the day — relying on coffee to function, crashing by 3 p.m., feeling like your body is operating at half capacity — that’s a signal. The body doesn’t run on exhaustion by default. Something is off.

Standard care often dismisses it. Labs come back normal, you’re told to sleep more and manage stress. None of that addresses why the fatigue is there. Hormonal deficiency, thyroid dysfunction, nutrient depletion, poor sleep quality, and metabolic imbalance are all common, identifiable, and treatable causes — none of which show up on a standard CBC.

Patients across Nassau County, Long Island, and all of New York can access a comprehensive fatigue evaluation via telehealth through StackMD. A consultation and a comprehensive lab panel is all it takes to get started. For patients who want faster recovery support, IV therapy through Stack Mobile IV can deliver targeted nutrients directly while the underlying evaluation proceeds.

Getting started takes under 10 minutes — no in-person visit required.

Condition Focus

Fatigue & Low Energy

Hormones, thyroid, metabolism, sleep, and nutrients evaluated together — because fatigue almost always has more than one driver.

1st

IV session often produces same-day energy improvement

4–8

Weeks to meaningful hormone optimization

The process

Simple steps, clear labs, and a plan built around your actual symptoms — not a template.

Schedule a telehealth consultation — no office visit, no waiting room. We meet you where you are.

Complete a comprehensive lab panel at a draw site near you — thyroid, hormones, nutrients, metabolic markers, and more.

Receive a personalized plan — hormone optimization, IV therapy, thyroid correction, or a combination — built around what your labs actually show.

Signs Your Fatigue May Have a Treatable Cause

These signs often show up together when fatigue and low energy have an underlying driver.

Waking up feeling unrefreshed even after a full night of sleep
Consistent afternoon energy crashes, especially after meals
Relying on caffeine throughout the day just to function
Feeling physically heavy or sluggish even at rest
Reduced motivation to do things you normally enjoy
Workouts feeling harder than they should for your fitness level
Getting sick more frequently than usual
A persistent sense of running on empty that never fully resolves

Why patients look deeper

Fatigue is almost always connected to something identifiable. Brain fog, low testosterone, thyroid imbalance, and perimenopause are its most frequent companions. Treating the full picture — not just the symptom — is what produces lasting improvement.

Root causes

Common Causes of Chronic Fatigue

The right treatment starts with understanding what’s actually driving the symptoms.

Hormonal Deficiency (Testosterone, Estrogen, Progesterone)

Sex hormones have a significant effect on energy, motivation, and overall vitality. Low testosterone in men and declining estrogen or progesterone in women are among the most common causes of persistent fatigue — particularly when the decline has happened gradually enough to be attributed to aging rather than a hormone deficit.

Thyroid Dysfunction

The thyroid regulates how quickly cells convert nutrients into energy. When thyroid output is low — even subclinically — the result is often fatigue, cognitive slowing, cold sensitivity, and weight changes. Many patients with thyroid-driven fatigue have TSH levels in the "normal" range but insufficient free T3 at the tissue level.

Adrenal Dysregulation and Cortisol Imbalance

The adrenal glands produce cortisol, which regulates the body's stress response and daily energy rhythms. Chronic stress, poor sleep, and ongoing inflammation can dysregulate cortisol output — producing the classic pattern of feeling wired at night and exhausted during the day.

NAD+ Depletion and Mitochondrial Dysfunction

NAD+ is a coenzyme essential for cellular energy production in the mitochondria. Levels decline with age, chronic stress, and illness — and insufficient NAD+ translates directly into reduced cellular energy output. IV NAD+ therapy through Stack Mobile IV delivers this coenzyme at the cellular level, bypassing the limitations of oral supplementation.

Nutrient Deficiencies (B12, D, Iron, Magnesium)

Vitamin B12, vitamin D, iron, and magnesium are all essential for energy metabolism. Deficiency in any of them can produce fatigue that mimics more complex conditions. These are easily identified through lab testing and directly addressable.

Sleep Apnea and Poor Sleep Architecture

Even patients who sleep enough hours may be getting low-quality sleep due to undiagnosed sleep apnea, fragmented sleep cycles, or insufficient deep sleep. Without adequate restorative sleep, no amount of optimization produces sustained energy.

Insulin Resistance and Blood Sugar Dysregulation

Blood sugar that spikes and crashes throughout the day creates a consistent energy roller coaster. Insulin resistance — common and often undiagnosed — prevents cells from effectively using glucose for energy, producing fatigue and dependence on stimulants to sustain function.

Chronic Inflammation and Immune Dysregulation

Low-grade chronic inflammation — from autoimmune activity, gut dysfunction, or environmental stress — is associated with significant fatigue. Inflammatory cytokines interfere with energy metabolism and neurotransmitter function, producing both physical and mental exhaustion.

Overtraining and Under-Recovery

Physical training creates fatigue, but so does insufficient recovery — particularly when training load exceeds the body's capacity to repair. This is especially common in patients who train consistently but don't adequately support recovery through sleep, nutrition, and stress management.

How StackMD Evaluates and Treats Fatigue

The StackMD approach
Hormones, metabolic health, sleep, stress, and symptom pattern evaluated together — because fatigue with one cause is the exception, not the rule.

Most fatigue workups come back normal — because they’re not testing for the right things. StackMD evaluates the full range of underlying contributors: thyroid panel (free T3, free T4, reverse T3, TSH, antibodies), full hormone workup (testosterone, estradiol, progesterone, DHEA-S, cortisol), comprehensive metabolic panel, and targeted nutrient testing (B12, vitamin D, iron, ferritin, magnesium). The first consultation and lab order happen via telehealth — no office visit required, and lab testing is completed at a draw site near you.

Treatment is built around what the labs and symptoms reveal. Hormone optimization through TRT or BHRT addresses deficiency-driven fatigue at the source. For patients with identified nutrient depletion or those seeking faster energy restoration, Myers Cocktail and NAD+ IV infusions through Stack Mobile IV deliver targeted support directly where it’s needed.

Peptide therapy may also be incorporated where applicable — particularly for patients dealing with impaired recovery, immune dysregulation, or cellular fatigue patterns. The starting point is always the evaluation — because effective treatment depends on knowing what’s actually driving the problem.

Stop guessing why you're tired.

A telehealth consultation and a comprehensive lab order is all it takes to get real answers — and a plan built around them, not around generic advice.

Serving Nassau County, Long Island, and all of New York. No in-person visit required to start.

Common questions

Frequently Asked Questions

Answers to the questions patients usually ask before they get started.

What causes chronic fatigue?

Chronic fatigue has many possible causes — hormonal deficiency, thyroid dysfunction, nutrient depletion, poor sleep quality, insulin resistance, chronic inflammation, and adrenal dysregulation are among the most common. A comprehensive panel-based evaluation is typically needed to identify the underlying contributors.

Can hormone imbalance cause fatigue?

What is NAD+ therapy and how does it help with energy?

Can I get a fatigue evaluation via telehealth?

What blood tests are used to evaluate fatigue?

Is adrenal fatigue a real condition?

How quickly can fatigue improve with treatment?

Related conditions

Fatigue is almost always connected to something identifiable. Brain fog, thyroid imbalance, and hormone decline are its most frequent companions — and treating them together is what produces lasting improvement.

Brain Fog

Assess hormones, sleep, metabolic health, and recovery support.

Thyroid Imbalance

Review thyroid function in context with symptoms and metabolism.

Hormone Imbalance

Treat the pattern, not a single lab value in isolation.

Start Your Energy Evaluation Today

Get to the bottom of why you’re tired — and get a plan built around the answer. A telehealth consultation and a comprehensive lab order is all it takes. Serving Nassau County, Long Island, and all of New York State.

Telehealth-first · In-person IV therapy available when needed