Feeling constantly tired, low on energy, or struggling with low libido?

Many men brush off these symptoms as “just ageing,” but they could be signs of Low Testosterone (Hypogonadism)—a common yet underdiagnosed hormonal condition.

Feeling constantly tired, low on energy, or struggling with low libido?

Many men brush off these symptoms as “just ageing,” but they could be signs of Low Testosterone (Hypogonadism)—a common yet underdiagnosed hormonal condition.

10+ Years of Experience in Endocrine & Hormone Health

Sub-specialist Fellowship in Andrology in Melbourne Australia

Strong advocate for a holistic approach—focused on comprehensive hormone health, not just prescriptions

Low Testosterone Myths – DEBUNKED

Testosterone (or “T”) is the male hormone that powers your energy, libido, and metabolic health.


Let’s clear up some common myths!

Dr Dinesh Mahendran

Medical Director
Consultant Endocrinologist

Instagram account:

Common Symptoms of 
Low Testosterone (Hypogonadism)

Mental & Emotional Changes

Fatigue or low energy

Brain fog or difficulty concentrating

Low mood, depression, or irritability

Lack of motivation 
or drive

Physical Symptoms

Decreased muscle mass and strength

Increased body fat, especially belly fat

Reduced bone density (risk of osteoporosis)

Hair thinning or loss

Hot flashes or night sweats (in some men)

Sexual Health Symptoms

Low sex drive (libido)

Erectile dysfunction or weaker erections

Reduced sexual performance or satisfaction

Decreased semen volume or fertility issues

Smaller testicle size (in some cases)

Noticing These Symptoms?

Don’t ignore the signs — low testosterone isn’t just about energy or libido.

It can impact your long-term health, mood, and quality of life.

What is Low Testosterone (Hypogonadism)?

Low Testosterone, also known as hypogonadism, is a condition where the body produces less testosterone than it needs.

Testosterone is a key hormone responsible for:

Who’s at Risk of Low Testosterone?

You may be at higher risk if you:

Think You Might Be at Risk?

Low testosterone can affect your energy, mood, performance, and long-term health, but it’s treatable.

It can impact your long-term health, mood, and quality of life.

Causes of Low Testosterone (Hypogonadism)

Brain or Hormonal Signal Issues (Secondary/Tertiary Hypogonadism)

Testicular Causes (Primary Hypogonadism)

Age-Related Decline

Lifestyle and Medical Conditions

Types of Hypogonadism

Hypogonadism is classified into two main types based on where the problem starts — in the brain (signal) or in the testes (production).

Primary Hypogonadism (Testicular Failure)

The testes cannot produce enough testosterone, despite the brain signalling them to do so.

Secondary Hypogonadism (Central or Pituitary Origin)

The problem lies in the brain—specifically the hypothalamus or pituitary gland—not sending the right signals to the testes.

Tertiary Hypogonadism

A rare form of hypogonadism occurs when the hypothalamus fails to produce GnRH hormone, disrupting the hormonal cascade.

Understand Your Type. Start Your Recovery.

Whether it’s primary, secondary, or tertiary hypogonadism, the correct diagnosis is the key to effective treatment.

OUR DOCTOR

Dr Dinesh Carl Junis Mahendran

Medical Director | Consultant Endocrinologist | Melbourne-trained | Marathon Runner

Dr Dinesh is a dedicated specialist in hormone and metabolic health with over a decade of experience managing complex endocrine conditions. Trained in Melbourne, he completed a Fellowship in Andrology and has worked with leading experts in diabetes, weight management, bone health, and hormone balance.

He believes in a holistic approach that goes beyond just treating symptoms. Dr. Dinesh provides personalised care designed to improve your lifespan and quality of life through better metabolic, physical, and hormonal health.
Whether you’re dealing with diabetes, weight gain, osteoporosis, or hormone imbalances, Dr. Dinesh offers a science-backed plan informed by his vast experience and empathy, with an emphasis on the role of movement in overall health.

10+ Years of Experience in Endocrine & Hormone Health

Clinical Leadership & Interests

  • Led the Bone Health Service at Khoo Teck Puat Hospital
  • Additional training in osteoporosis and male hormone health (Andrology)
  • Early adopter of advanced weight and diabetes therapies (GLP-1) since 2014

Award-Winning Endocrinologist

  • Winner – Prince Henry’s Surgical Prize, Monash University
  • Top Registrar award at the Endocrine Society of Australia Clinical weekend 2016
  • Awarded the only training position in Australia in Andrology in 2017
  • NHG teaching award for Senior Doctors

Active Athlete

  • Ran multiple full and half-marathons and HYROX competitor

START YOUR PERSONALISED HEALTH JOURNEY

If you’re feeling “off” despite normal test results, struggling with weight changes, fatigue, or unexplained symptoms—it’s time to take a deeper look.



Get clarity and a tailored plan built around your unique hormone and metabolic health.

Brain or Hormonal Signal Issues (Secondary/Tertiary Hypogonadism)

  • Pituitary gland disorders or tumours
  • Hypothalamic dysfunction (e.g. Kallmann syndrome)
  • Head trauma or brain surgery
  • Long-term use of opioids or steroids
  • Chronic stress or severe illness

Testicular Causes (Primary Hypogonadism)

  • Genetic conditions (e.g. Klinefelter syndrome)
  • Testicular injury or trauma
  • Chemotherapy or radiation
  • Mumps infection affecting the testes
  • Undescended testicles (cryptorchidism)

Age-Related Decline

  • Natural drop in testosterone levels, typically after age 30
  • Sometimes referred to as “andropause” or age-related hypogonadism

Lifestyle and Medical Conditions

  • Obesity
  • Type 2 diabetes or metabolic syndrome
  • Chronic liver or kidney disease
  • Sleep apnea
  • Malnutrition or extreme dieting
  • Excessive alcohol consumption

Fertility & Reproductive Care

  • PCOS Treatment (Irregular periods/ Infertility/ Acne)
  • Hormone-related Infertility Treatment & Optimisation

Bone Health Management

  • Osteoporosis Assessment and Treatment
  • Bone Building Therapy

Diabetes

  • Diabetes Management
  • Diabetes Technology/ Continuous Glucose Monitoring (CGM)
  • Insulin Therapy & Pump Management

Metabolic & Hormonal Screening

Metabolic (Diabetes/ Thyroid/ Cholesterol/ Bone Health) Screening Packages

Longevity

Longevity Counselling & Management

Weight Management & Nutritional Counselling

  • Diet and Exercise-Focused Plans
  • GLP-1/ Weight Loss Injections
  • Pre-Bariatric Surgery Optimisation

Endocrine Therapy

  • Thyroid/ Adrenal Hormone Replacement
  • Testosterone or Oestrogen Therapy
  • Prolactin & Aldosterone Suppression
  • Klinefelter’s and Turner’s Syndrome Management
  • Mitigating Androgen-Deprivation in Prostate Cancer
    Mitigating Oestrogen Blockade in Breast Cancer
  • Immunotherapy-related Endocrinopathy Management
  • Thyroid surgery complication management (Hypoparathyroidism)
  • Gender-Affirming Therapy