Dr. Lydia Sun, MD looks past the symptoms to the biology underneath — advanced diagnostics and individualized, functional-medicine treatment plans that help you feel like yourself again.
Dr. Sun provides comprehensive labs and diagnostics that pinpoint what's actually driving your symptoms and chronic conditions — then translates those findings into a treatment plan built for your metabolism, genetics, and body. If you've been told your labs are "normal" but you still don't feel right, functional medicine is built for exactly that gap.
Our goal is a comprehensive, functional-medicine plan that optimizes your health while reducing or eliminating the symptoms holding you back. You're an active participant in your own care, with a plan you actually understand.
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Dr. Lydia Sun practices integrative internal medicine — pairing conventional training with functional-medicine tools to uncover the underlying causes of illness and return the body and mind to balance.
Her approach is root-cause and whole-person: advanced diagnostics to understand each patient's individual biology, then customized plans built around their metabolism, genetics, and goals. She believes lifestyle is medicine, and that patients do best as active participants in their own care — treated with compassion, patience, and a plan they understand.
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Request an appointment online, or send a question about a service — someone will get back to you within one business day.
Both offices see patients by appointment — Union on Mondays, Old Bridge on Wednesdays.
(908) 372-5555Email sunwellnessllc@gmail.com · Fax 609-935-3791
Declining and imbalanced hormones can affect how you feel both physically and emotionally, from mood and sleep to energy and libido. Dr. Sun uses bioidentical hormone therapy to address the underlying imbalance rather than only managing symptoms, building a plan around your tested hormone levels and individual needs.
Age-related hormone decline in men can show up as low energy, reduced stamina, changes in mood, loss of muscle, and diminished libido. Dr. Sun designs individualized bioidentical hormone programs based on your lab work to help restore balance and support long-term health.
Hormone pellet therapy is a delivery method in which a small pellet is placed under the skin during a brief in-office procedure. Once placed, it releases bioidentical hormones steadily over a period of months. Dr. Sun determines whether pellets are an appropriate option for your hormone plan.
For established patients, Dr. Sun offers bioidentical hormone care through secure telemedicine visits, making it easier to review labs, adjust dosing, and follow up from home. Your treatment remains physician-directed and tailored to your tested hormone levels throughout the program.
Functional medicine begins with understanding what is actually driving your symptoms. Dr. Sun uses a comprehensive set of labs and diagnostics, including metabolic, nutritional, and other advanced testing, to assess your total health and inform a personalized treatment plan.
Functional oncology offers supportive, whole-person care intended to work alongside conventional cancer treatment rather than replace it. Dr. Sun develops individualized plans focused on nutrition, resilience, and quality of life in coordination with your oncology team.
Digestive health influences energy, immunity, mood, and much of how you feel day to day. Dr. Sun focuses on restoring balance to the gut microbiome and identifying root causes of digestive concerns, then building a sustainable plan to support lasting improvement.
Dr. Sun provides physician-supervised medication-assisted recovery using FDA-approved treatments for opioid and alcohol dependence. Care is delivered with a whole-person functional medicine approach that supports both physical recovery and long-term wellness.
As we age, the body's natural production of the amino acids that form peptides declines, affecting energy, recovery, and healthy aging. Dr. Sun uses physician-guided peptide therapy to support overall wellness, with a plan built around your history, lifestyle, and goals.
Certain peptide therapies are used to support the body's own repair and recovery processes after injury, illness, or intensive training. Dr. Sun evaluates whether a physician-gated, individualized peptide protocol is appropriate to help you recover more effectively.
For patients concerned about thinning hair, Dr. Sun offers peptide-based approaches aimed at supporting the hair follicle without surgery. Any therapy is individualized and physician-directed, following a review of your health history and the factors contributing to hair loss.
Peptide therapy can support strength, stamina, and recovery for patients focused on athletic performance and training. Dr. Sun determines whether a physician-supervised, individualized peptide plan fits your goals and overall health picture.
Growth hormone-supporting peptides such as Sermorelin and Ipamorelin are used to encourage the body's own production of growth hormone, which plays a role in energy, recovery, and healthy aging. This therapy is physician-gated and individualized, prescribed only after Dr. Sun reviews whether it is appropriate for you.
Semaglutide is an FDA-approved GLP-1 medication used to support weight loss by helping regulate appetite and blood sugar. Under Dr. Sun's supervision, it is combined with nutrition and lifestyle guidance as part of a medically monitored, individualized weight-loss program.
Tirzepatide is an FDA-approved medication that supports weight loss through its effects on appetite and metabolic regulation. Dr. Sun oversees each program personally, pairing the medication with nutritional and lifestyle support and adjusting the plan to your individual response.
Dr. Sun offers physician-supervised HCG-based weight-loss programs as one option within a broader medical weight-management approach. Each program is individualized, monitored throughout, and combined with nutrition and lifestyle guidance to support healthy, sustainable results.
IV vitamin therapy replenishes vitamins, minerals, and nutrients directly into the bloodstream in a safe, controlled setting. Dr. Sun tailors each infusion to address your specific deficiencies and wellness goals as part of your overall functional medicine plan.
Chelation and detoxification therapies are used to support the body's removal of certain metals and toxins under close medical oversight. Dr. Sun evaluates whether these therapies are appropriate for you and integrates them into a personalized, physician-directed plan.
Sexual dysfunction in men often has underlying causes such as hormone imbalance, vascular health, or stress that conventional care can overlook. Dr. Sun takes a root-cause approach, evaluating the whole picture to build an individualized plan aimed at restoring function and confidence.
Changes in desire, comfort, and sexual satisfaction are common and often tied to hormonal or other treatable factors. Dr. Sun addresses female sexual wellness with a physician-led, root-cause approach and an individualized plan tailored to your health and goals.
Low testosterone can contribute to reduced libido, low energy, mood changes, and diminished stamina in both men and women. Dr. Sun offers physician-supervised testosterone therapy guided by your lab results, with dosing individualized to your tested levels and monitored over time.
PT-141 is a therapy used to support sexual desire and function for appropriate patients. It is physician-gated and individualized, prescribed only after Dr. Sun reviews your health history and determines whether it is a suitable part of your sexual wellness plan.
As estrogen and progesterone decline, symptoms like hot flashes, sleep disruption, and mood shifts can take hold. Dr. Sun works to identify the specific hormonal and metabolic drivers behind each woman's transition, then builds an individualized plan to help restore balance and quality of life.
The years before menopause bring fluctuating hormones that can trigger irregular cycles, sleep trouble, anxiety, and fatigue. Dr. Sun evaluates hormone patterns, thyroid function, and lifestyle factors to identify what is driving symptoms and to support a smoother transition.
Declining testosterone in men can contribute to low energy, reduced libido, mood changes, and loss of muscle. Dr. Sun assesses hormone levels alongside metabolic and lifestyle factors to identify the underlying drivers and tailor a plan that helps restore energy and well-being.
Persistent stress can dysregulate the body's cortisol rhythm, leaving you drained, wired at night, or dependent on caffeine to function. Dr. Sun looks at the stress-hormone axis, sleep, nutrition, and lifestyle to identify and address the underlying drivers of chronic depletion.
An underactive or imbalanced thyroid can quietly drive fatigue, weight changes, hair loss, and brain fog. Dr. Sun orders comprehensive thyroid testing and looks upstream at nutrient status, autoimmunity, and hormone interplay to identify and address the true root of dysfunction.
Polycystic ovarian syndrome often stems from insulin resistance and hormonal imbalance that fuel irregular cycles, weight gain, and skin or hair changes. Dr. Sun works to identify the metabolic and hormonal drivers unique to each patient and to address them at the root.
Blood-sugar dysregulation is shaped by diet, insulin resistance, inflammation, and lifestyle over time. Dr. Sun takes a root-cause approach, using detailed metabolic testing to understand each patient's drivers and to build a personalized plan for better glucose control.
When the scale won't move despite real effort, hidden factors like hormone imbalance, insulin resistance, thyroid issues, or chronic stress are often at play. Dr. Sun works to identify and address the underlying drivers so the body can respond to healthy changes.
Deep, unrelenting fatigue rarely has a single cause and often involves mitochondrial, hormonal, immune, and gut factors. Dr. Sun uses in-depth diagnostics to map what is driving your exhaustion and to address those root contributors rather than masking symptoms.
Widespread pain, fatigue, and poor sleep can stem from inflammation, nervous-system sensitization, hormonal imbalance, and gut health. Dr. Sun investigates these underlying drivers to build an individualized plan aimed at reducing pain and restoring function.
When the immune system attacks the body's own tissues, triggers often include gut dysfunction, chronic inflammation, infections, and environmental exposures. Dr. Sun works to identify and address these underlying drivers alongside conventional care to calm immune overactivity.
Joint pain and inflammation are frequently fueled by diet, gut health, hormonal shifts, and systemic inflammation. Dr. Sun looks beyond the joint itself to identify the underlying inflammatory drivers and to address them through a personalized, root-cause plan.
Painful, heavy periods and pelvic pain often reflect estrogen imbalance, inflammation, and immune and gut factors. Dr. Sun evaluates these underlying contributors and builds an individualized plan to help address the root drivers of endometriosis and ease symptoms.
Uterine fibroids are commonly linked to estrogen dominance and hormonal imbalance influenced by metabolism, inflammation, and detoxification. Dr. Sun works to identify the hormonal and metabolic drivers behind fibroid growth and to address them at the source.
Difficulty conceiving can involve hormonal imbalance, thyroid dysfunction, nutrient status, inflammation, and metabolic health in both partners. Dr. Sun uses comprehensive testing to identify and address the underlying drivers and to support the body's natural fertility.
Severe premenstrual mood and physical symptoms often reflect hormone imbalance, nutrient deficiencies, and disrupted stress and blood-sugar regulation. Dr. Sun works to identify each patient's specific drivers and to restore hormonal balance across the cycle.
Bloating, reflux, and irregularity often trace back to microbiome imbalance, food sensitivities, inflammation, and impaired digestion. Dr. Sun evaluates gut health in depth to identify the root causes and to restore healthy, comfortable digestion.
Erectile dysfunction is frequently a signal of underlying vascular, hormonal, metabolic, or stress-related issues rather than an isolated problem. Dr. Sun evaluates these root factors, including testosterone and cardiovascular health, to identify and address the true drivers.
Chronic allergic reactions often reflect an immune system driven out of balance by gut health, inflammation, and environmental triggers. Dr. Sun uses targeted testing to identify what is provoking your symptoms and builds a plan to calm the underlying immune response.
Recurrent airway inflammation and breathing difficulty can be driven by allergies, immune imbalance, gut health, and environmental exposures. Dr. Sun looks upstream at these underlying contributors to help reduce inflammation and support easier breathing alongside conventional care.
Irregular, absent, or difficult periods usually point to imbalances across the hormonal, thyroid, and metabolic systems. Dr. Sun investigates these interconnected drivers to identify what is disrupting the cycle and to restore healthy, predictable menstrual function.
Bone loss is influenced by hormone levels, nutrient status, inflammation, and metabolic health well beyond calcium alone. Dr. Sun assesses these underlying factors to identify the drivers of declining bone density and to build a plan that supports stronger bones.