"Normal" Blood Test Results
What They Really Mean, and Why They Can Miss the Full Picture
"Your bloods are normal." For most people, that result is an accurate reflection of good health, and it's exactly the outcome you want to hear. For some, though, it doesn't match how they feel. Exhausted, foggy, low, still not right, despite a result that says everything is fine.
Understanding why comes down to one thing: what "normal" actually means on a blood test, and how that differs from what "optimal" means for your health.
Common Signs You May Recognise
Told your bloods are normal, but you still feel exhausted, foggy or unwell
A result sitting right at the bottom of the range, described as "fine"
The same conversation with your GP more than once, with the same outcome
A sense that something is being missed, without knowing what to ask for
Symptoms put down to stress, ageing, or "just one of those things"
Why "Normal" and "Optimal" Are Not the Same Thing
How Reference Ranges Are Calculated
A lab reference range is not a measure of health. It is a statistical range. A lab takes a large group of people, runs the test, and looks at the spread of results. Around 95% of that group falls in the middle, and that middle section becomes the "normal" range. The 2.5% at each end is flagged as abnormal. This is a normal distribution, or a bell curve.
Nobody in that original group was screened for how well they actually felt. The range shows where most people sit, not where you should be aiming for good health.
Why the Range Can Include Unwell People
Some of the people in that original group likely had undiagnosed health issues. If enough of them did, the whole range shifts to accommodate it. "Normal" can end up being an average that includes people who were not well either.
This is why optimal ranges matter. Optimal ranges are drawn from research into where people actually feel well, not simply where the general population happens to sit.
Ferritin: A Common Example
Ferritin is the marker I see this with most often. The reference range is wide, and many clients sit right at the bottom of it, technically "in range," while experiencing significant fatigue. Technically normal. Functionally depleted.
How Can Your GP Help?
Your GP is an important first step, and standard testing plays an important role.
They may:
Run a basic blood panel to check for serious or urgent conditions
Flag results that fall outside the standard reference range
Rule out common causes such as anaemia
Refer for further investigation if something is significantly abnormal
Standard NHS testing is built to rule out serious disease, and it does that well. It is not designed to assess against optimal levels, so even with a GP doing everything correctly, a fuller picture can sometimes sit outside what standard testing covers.
My Approach
Rather than looking at a single number in isolation, I look at:
The full picture, including results sitting within range but at the edges of it
Patterns across multiple markers, not just the ones flagged as abnormal
Diet, lifestyle and symptom context alongside the blood work
Optimal ranges drawn from research, not just standard lab cut-offs
A plan built around what your body needs, rather than a generic recommendation
Every result is interpreted against the whole picture.
Functional Testing: The Wellness Check
My Wellness Check is built to give you that fuller picture, so you can move forward with clarity. This includes:
A 60-biomarker panel, including advanced thyroid markers often missed on standard testing
A 7-day Diet and Lifestyle Review
A phlebotomist who comes to your home or work for the blood draw
A 75-minute consultation to talk through your results
A follow-up two weeks later to review progress
Find Out What Your Results Could Be Missing
If you've had a "normal" result that didn't match how you feel, there's usually more to the picture. Book a free 20-minute call and let's have a proper chat about what might be getting in your way.
