Men’s Hormone Care • Board-Certified Internal Medicine

Testosterone Replacement Therapy in Los Angeles

Comprehensive evaluation and individualized treatment for men with symptoms and repeatedly low testosterone levels. Care is directed by David Nazarian, M.D., with attention to possible underlying causes, fertility goals, treatment alternatives, potential benefits, risks, and ongoing monitoring.

Testosterone replacement therapy consultation for men in Los Angeles

Low Testosterone Requires More Than a Single Lab Result

Symptoms such as reduced sexual interest, erectile concerns, fatigue, depressed mood, reduced strength, changes in body composition, difficulty concentrating, or reduced motivation may occur with testosterone deficiency—but these symptoms are not specific to low testosterone.

A diagnosis generally requires compatible symptoms together with consistently low testosterone measurements obtained under appropriate conditions. Results should be interpreted in context rather than treated as an isolated number.

A Comprehensive Testosterone Evaluation

Symptoms & History

Review of sexual symptoms, energy, mood, sleep, exercise, weight changes, medical conditions, medications, prior hormone use, family history, and treatment goals.

Confirmatory Testing

Testing may include repeat morning total testosterone measurements and, when clinically useful, free testosterone or related studies. Timing and interpretation matter.

Cause & Risk Review

Evaluation may consider pituitary or testicular causes, obesity, sleep apnea, diabetes, acute illness, medications, fertility goals, prostate health, blood counts, and cardiovascular risk.

Laboratory evaluation for low testosterone in men

Possible Causes of Low Testosterone

Testicular Causes

Prior injury, infection, surgery, chemotherapy, radiation, genetic conditions, or other disorders affecting testicular function.

Pituitary or Hypothalamic Causes

Conditions affecting signaling from the brain to the testes, sometimes requiring additional hormone testing or imaging.

Functional & Medical Factors

Obesity, sleep apnea, poorly controlled chronic illness, certain medications, substance use, severe stress, inadequate sleep, or recent illness.

Treating a contributing condition may improve symptoms or testosterone levels and may sometimes be more appropriate than beginning testosterone therapy.

When Testosterone Therapy May Be Considered

Testosterone therapy may be considered for appropriately evaluated men with compatible symptoms and confirmed biochemical deficiency when expected benefits reasonably outweigh potential risks. The decision should include discussion of alternatives, fertility, prostate and cardiovascular considerations, and the monitoring plan.

Potential Treatment Goals

Goals may include improvement in specific deficiency-related symptoms, sexual function, anemia, bone health, or body composition in appropriately selected patients. Individual response varies and no outcome is guaranteed.

What TRT Is Not

Testosterone is not a general anti-aging treatment, a shortcut for bodybuilding, or an appropriate response to fatigue without diagnostic evaluation. It should not be prescribed solely to optimize a number.

Treatment Forms and Individualized Dosing

Depending on the patient and clinical circumstances, treatment may involve injections, transdermal gels, patches, or other prescribed formulations. Each route has different practical considerations, absorption patterns, dosing schedules, and potential adverse effects.

Dose and frequency should be adjusted according to clinical response and safety monitoring—not simply increased to pursue supraphysiologic testosterone levels.

Fertility Is an Essential Consideration

Exogenous testosterone can suppress sperm production and may reduce fertility. Men who are trying to conceive now or may want biological children in the future should discuss this before starting therapy.

Depending on the clinical situation, evaluation of reproductive goals and alternatives to exogenous testosterone may be appropriate. Referral to a fertility or urology specialist may also be recommended.

Before Starting Treatment

Baseline assessment may include blood count, prostate-related evaluation appropriate to age and risk, cardiovascular review, sleep-apnea assessment, medication review, and other testing based on the patient’s history.

Risks, Precautions, and Monitoring

Potential Adverse Effects

Possible concerns include elevated hematocrit, acne or oily skin, breast symptoms, fluid retention, reduced sperm production, testicular shrinkage, worsening of untreated severe sleep apnea, and other treatment-specific effects.

Ongoing Monitoring

Monitoring may include symptom response, testosterone levels, blood counts, blood pressure, prostate-related assessment, adverse effects, treatment adherence, and changes in cardiovascular or general medical health.

New chest pain, sudden shortness of breath, neurologic symptoms, severe headache, leg swelling, urinary obstruction, or another concerning change requires timely medical evaluation.

Why Choose David Nazarian, M.D.

Board-Certified in Internal Medicine

Dr. Nazarian evaluates testosterone concerns within the broader context of metabolic health, cardiovascular risk, sleep, medications, weight, fertility, prostate health, and other possible causes of symptoms.

The goal is to determine whether testosterone deficiency is present, identify reasonable contributing factors, and select a medically responsible plan with appropriate follow-up.

David Nazarian, M.D., testosterone therapy physician in Los Angeles

What to Expect

1. Consultation

Discuss symptoms, health history, medications, sleep, fertility goals, prior treatment, and concerns.

2. Testing

Confirm testosterone status and evaluate relevant contributing causes and baseline safety factors.

3. Shared Decision

Review treatment and non-treatment options, limitations, risks, practical considerations, and goals.

4. Monitoring

Track response and safety, adjust treatment when appropriate, and reassess the continued indication.

Medical Author & Reviewer

Written by: David Nazarian, M.D.
Medically reviewed by: David Nazarian, M.D.
Medical review date: September 17, 2026

David Nazarian, M.D., is Board-Certified in Internal Medicine and has extensive experience evaluating and treating women and men with hormonal concerns. His approach emphasizes comprehensive assessment, evidence-informed decision-making, patient education, individualized treatment, safety, and ongoing follow-up.

Frequently Asked Questions

Diagnosis generally requires compatible symptoms together with consistently low testosterone measurements obtained under appropriate conditions. A single low result may need confirmation and interpretation in clinical context.
Testosterone is commonly measured in the morning, particularly in younger men, because levels can vary during the day. Timing, sleep schedule, recent illness, food intake, and laboratory method may affect interpretation.
Some men with confirmed deficiency may experience improvement in particular symptoms, but fatigue and mood changes have many possible causes. Improvement is not guaranteed, and other contributors should be evaluated.
Yes. Exogenous testosterone can suppress sperm production and reduce fertility. Reproductive plans should be discussed before treatment begins.
Testosterone can increase hematocrit, which requires monitoring. Individual clotting and cardiovascular risks should be reviewed, and concerning symptoms require medical evaluation.
Prostate health should be assessed according to age, symptoms, and risk. Current evidence and individual circumstances should be discussed with the treating physician; testosterone is not appropriate for every patient.
There is no universal duration. Continued treatment depends on the diagnosis, symptom response, safety results, patient goals, and whether benefits continue to outweigh risks.

Schedule a Testosterone Evaluation

Meet with David Nazarian, M.D., to discuss your symptoms, laboratory testing, health history, fertility goals, treatment alternatives, and whether testosterone therapy may be appropriate.