15 Questions — Takes About 5 Minutes

Understanding Low Testosterone in Men Over 40

Testosterone levels decline naturally with age — typically by 1–2% per year from the mid-30s. By age 45, an estimated 40% of men have testosterone levels below the clinical normal range. However, because the decline is gradual, many men attribute their symptoms to stress, poor sleep, or simply getting older — without recognising that a correctable hormonal imbalance may be the root cause.

The symptoms of low testosterone are broad and often non-specific — fatigue, low libido, mood changes, reduced muscle mass, increased body fat, and cognitive difficulties. Because these symptoms overlap with many other conditions, low testosterone is frequently missed or dismissed in primary care. A simple blood test is the definitive diagnostic step.