Testosterone Blood Test London: What to Check and What Your Results Mean
- Rick Miller
- 4 days ago
- 2 min read
Introduction
Many men who feel:
tired all the time
unmotivated
not quite themselves
are told their testosterone is “normal”.
And that’s where the problem starts.
Because in many cases:
...the wrong tests were done or the results were interpreted incorrectly
If you want real answers, you need to understand what to test, and what it actually means.
What Does a Testosterone Blood Test Measure?
A complete testosterone assessment goes beyond a single number.
Total Testosterone
This is the most commonly measured marker.
However: it does not tell the full story
Free Testosterone
This is the active form your body can use.
Low free testosterone can exist even when total testosterone appears normal.
SHBG (Sex Hormone Binding Globulin)
SHBG binds testosterone and reduces availability.
High SHBG can make testosterone less effective.
Additional Markers
A comprehensive panel may also include:
LH and FSH
oestradiol
prolactin
These help identify the underlying cause.
Why Standard Testosterone Testing Often Falls Short
Many men are tested using: total testosterone alone
This can lead to:
missed diagnoses
inaccurate reassurance
ongoing symptoms
because hormone health is more complex than one number.
What is the best blood test for testosterone?
A full panel including total testosterone, free testosterone and SHBG provides the most accurate assessment.
Why do I feel low testosterone if my test is normal?
Because “normal” ranges are broad. You may be within range but still suboptimal for your physiology and performance.
When Should You Get Your Testosterone Tested?
Persistent Fatigue
Low energy that does not improve with rest.
Reduced Motivation
A noticeable drop in drive and focus.
Difficulty Building or Maintaining Muscle
Changes in body composition.
Particularly abdominal fat.
Poor Recovery
Slower recovery from training or stress.
How We Assess Testosterone at Miller Health
We assess a full hormonal panel, not just total testosterone.
This allows us to see:
muscle mass
fat distribution
We assess:
energy output
metabolic efficiency
This gives a complete picture of performance and physiology.
What Your Results May Actually Mean
Low Free Testosterone
May indicate reduced availability despite normal totals.
High SHBG
Can limit effective testosterone levels.
Hormonal Imbalance
Other markers may highlight underlying issues affecting hormone production.
Frequently Asked Questions
When is the best time to test testosterone?
Morning testing is recommended, as testosterone levels are highest early in the day.
Do I need to fast for a testosterone test?
Fasting is not always required for testosterone itself, but may be recommended if other markers are being assessed.
Can testosterone levels be improved naturally?
Yes. Sleep, nutrition, training and metabolic health all play a significant role.
The Bottom Line
If you are relying on a single testosterone number: you are likely missing the full picture
Complete testing provides:
clarity
direction
actionable insight
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