Testosterone: the number nobody has ever properly checked.
Being "within range" is not the same as being well. Here is what happens when your testosterone drops, and nobody tells you.
Most men who go to their GP for a checkup will have their cholesterol measured, maybe their blood sugar. Very few will have their testosterone tested. And of those who do, most will be told their result is fine, without anyone checking whether it actually is.
This matters because testosterone is not just a sex hormone. It regulates energy metabolism, bone density, red blood cell production, mood, cognitive function, and muscle protein synthesis. A level that is technically "in range" but ten points below where you functioned five years ago is not fine.
The slow decline nobody tells you about.
Testosterone in men peaks around age 20 to 25 and then falls by approximately 1% per year. By age 45, a man who started at 700 ng/dL has a statistical expectation of being around 500. By 60, he may be at 350 to 400. All of these numbers are technically "within range" in most Italian labs (reference range: 264 to 916 ng/dL). None of them feel the same.
A study published in the Journal of Clinical Endocrinology and Metabolism found that men in the lowest quintile of testosterone were twice as likely to report fatigue, irritability, reduced libido, and poor recovery from exercise, even when both groups were within the "normal" range.
Being in range means you don't have hypogonadism. It doesn't mean you are anywhere near where you should be.
What suboptimal testosterone actually feels like.
- Fatigue that sleep doesn't fix. Waking up exhausted after eight hours.
- A waist that expands despite not changing your diet, because low testosterone accelerates visceral fat accumulation.
- Slower recovery from training, with muscle soreness that lasts four or five days instead of two.
- Reduced motivation, focus, and drive: what many men describe as "just not caring as much".
- Mood changes: irritability, low mood, reduced confidence.
These symptoms rarely come together at once. They accumulate gradually, which is why men often attribute them to stress, age, or "life", rather than to something measurable and, in many cases, addressable.
What we look at.
A total testosterone number alone is not enough. We also measure free testosterone, SHBG (sex hormone binding globulin), LH, FSH, and oestradiol. The ratio between these markers tells the whole story.
If you are a Rosa member and male, testosterone is in your panel twice a year. Because knowing the trend matters more than any single number.
