Low Testosterone

Understanding Low T — the most common reason men seek TRT

What Is Low Testosterone?

Low testosterone (Low T), clinically known as hypogonadism, occurs when the body doesn't produce enough testosterone. It affects an estimated 4-5 million American men, though many cases go undiagnosed.

Testosterone levels naturally decline with age — approximately 1-2% per year after age 30 — but some men experience more significant drops that substantially impact quality of life, energy, body composition, and sexual health.

Symptoms of Low T

  • Fatigue and low energy — Persistent tiredness that doesn't improve with rest
  • Reduced muscle mass — Difficulty building or maintaining muscle despite exercise
  • Increased body fat — Particularly around the midsection
  • Low libido — Decreased interest in sexual activity
  • Erectile dysfunction — Difficulty achieving or maintaining erections
  • Mood changes — Irritability, depression, or anxiety
  • Brain fog — Difficulty concentrating, poor memory
  • Hair loss — Thinning hair on the body or face
  • Sleep disturbances — Insomnia or poor sleep quality
  • Decreased bone density — Increased risk of fractures

Causes

  • Age-related decline — Natural decrease starting around age 30
  • Primary hypogonadism — Testicular damage or dysfunction
  • Secondary hypogonadism — Pituitary or hypothalamic disorders
  • Obesity — Excess body fat converts testosterone to estrogen
  • Chronic illness — Diabetes, liver disease, kidney disease
  • Medications — Opioids, steroids, certain antidepressants
  • Stress — Chronic stress elevates cortisol, which suppresses testosterone

Diagnosis

Diagnosis requires a blood test measuring total and free testosterone levels, typically drawn in the morning when levels peak. Most doctors consider total testosterone below 300 ng/dL as low, though symptoms can occur at higher levels.

A comprehensive panel also includes estradiol, SHBG, LH, FSH, prolactin, CBC, metabolic panel, and PSA to rule out other conditions and establish a baseline.

Treatment Options

Testosterone replacement therapy (TRT) is the primary treatment for clinically low testosterone. Delivery methods include:

  • Injections — Weekly or biweekly intramuscular injections (most common)
  • Pellets — Subcutaneous implants lasting 3-6 months
  • Topical gels/creams — Daily application absorbed through the skin
  • Patches — Transdermal patches applied daily

Your doctor will monitor your levels regularly and adjust dosing as needed. Find a TRT clinic near you to get tested.