Low energy at 45? Why your testosterone baseline matters

A morning blood test shows where your testosterone sits today. A full panel measures total and free (unbound) testosterone, plus SHBG, the protein that carries testosterone in your blood, and LH, the brain's signal to make more. Because tiredness has many causes, the result means most when read with your symptoms and compared with your own past numbers.

Here's why your own numbers matter. Testosterone varies a lot between men, and lab ranges are wide. One study in The Journal of Urology found a man's usual level could drop by half and still sit inside the reference range. Its authors suggested using a personal baseline, built from repeated tests, to guide decisions. Numia's Male Hormone Panel helps you set yours.

Does testosterone really drop with age?

Yes, gradually. The Massachusetts Male Aging Study followed more than 1,100 men for seven to ten years. Within the same men, total testosterone fell about 1.6% a year, and the usable share fell 2–3% a year.

Health and habits matter too. In the same study, gaining 4 to 5 BMI points (a weight-for-height score) was linked to a drop similar to about 10 years of ageing. In the European Male Ageing Study, men who lost weight saw their testosterone rise. That's why a baseline helps: it gives you something to measure changes against.

Which symptoms point to testosterone?

BC's testosterone protocol sorts the signs by how clearly they point to testosterone:

So what does this mean for you? If tiredness comes with a lower sex drive or fewer morning erections, a testosterone test is well aimed. If tiredness is the main thing, Numia's Fatigue Panel checks iron, thyroid and blood sugar.

How do you get a number you can trust?

Testosterone peaks in the morning and shifts from day to day. BC's protocol asks for a sample within three hours of waking, ideally fasting and not while ill. If a result is low, guidelines call for a second morning test. Numia's home visits are in the morning, so timing takes care of itself.

Where does Numia fit?

The usual route runs in steps: an appointment for a requisition, a lab visit, a wait, then another appointment for results. It's publicly funded when clinically indicated, such as when your doctor orders testosterone to investigate symptoms.

Numia puts those steps in one place. A licensed Canadian physician approves your requisition online within 24 hours. A clinician comes to your home for a 10-minute morning draw, and you get results in 7 days, in plain English in the Numia app. The Male Hormone Panel measures six markers, including total and free testosterone, SHBG and LH. It's an HSA-eligible service. Treatment decisions stay with a prescriber.

Frequently asked questions

Should I test before starting TRT?

Test first. Only a prescriber decides on TRT, and guidelines ask for symptoms plus low testosterone on two separate mornings. BC's protocol notes long-term therapy can suppress your own production for up to 18 months, so a pre-treatment Numia panel records your starting point.

How can I tell if natural efforts are working?

Start with a baseline, then retest the same way: morning, fasting, same time after waking. Single readings vary, so watch the trend. Numia's panel includes SHBG and LH, which help explain why a number moved.

Should I test if I feel fine?

Yes, if you want a baseline. BC's protocol, written for diagnosis, doesn't recommend testing men without symptoms. A baseline answers a different question: what's normal for you, so a later change stands out.