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What is endocrinology?

Endocrinology focuses on providing expert care for problems relating to the endocrine system, which is also referred to as the hormone system. The endocrine system comprises glands and certain organs that secrete hormones, the body’s chemical messengers. These hormones help the body function at an optimum level.

Main bodily functions regulated by the hormones:

  • Metabolism, the process where the intake of foods and drinks are converted into energy for the body’s consumption
  • Growth and development
  • Sexual function and reproduction
  • Sleep
  • Mood

The hormones produced by the endocrine system include but not limited to:

  • Adrenaline
  • Dopamine
  • Insulin
  • Melatonin
  • Testosterone
  • Oxytocin
  • Thyroid hormone
  • Growth hormone
  • ADH- Anti-diuretic hormone

The glands and organs that generate hormones include but not limited to:

  • Adrenal glands
  • Thyroid gland
  • Parathyroid glands
  • Pituitary gland
  • Pancreas
  • Testes
  • Ovaries

When the production of hormones or the endocrine system is disrupted, endocrine disorders would arise, which is when an endocrinologist can step in to restore the balance and help you feel better.

Endocrine disorders

When the level of hormones produced and released by the endocrine system goes off the balance, it gives rise to a string of endocrine disorders or diseases. Some common ones caused by hormonal imbalances:

  • Diabetes
  • Cushing’s disease
  • Hyperthyroidism
  • Hypothyroidism=
  • Goiter
  • Addison's Disease ( Adrenal Gland Disorders)
  • Gigantism Small Intestine
  • Erectile dysfunction
  • Polycystic ovarian syndrome (PCOS)
  • Osteopenia
  • Osteoporosis
  • Growth hormone related disorders

The under or overproduction of hormones, i.e., an “error” in the body’s endocrine system, could negatively impact many aspects of our day-to-day life. However, with the help of an endocrinologist, patients affected by problems in the hormonal system can be treated to lead a better quality of life.


Dr Kang Waye Hann

Consultant Internal Medicine & Endocrinologist

Bahasa Melayu, Cantonese, English, Hokkien, Mandarin



Dato’ Dr Anuar Zaini Md Zain

Consultant Endocrinologist

Bahasa Melayu, English


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