Nutrients and Energy Profile

Struggling with persistent fatigue or brain fog? This blood test investigates four essential nutrients: Active B12, Folate, Iron and Vitamin D. These are among the most common and easily correctable causes of low energy, so a simple test can often point you straight to the solution.
A doctor-written report.
Doctor-written reports and free doctor consultations on selected tests.
- Your blood test — processed by a UKAS-accredited UK laboratory.
- A doctor-written report — your results reviewed personally by Dr James Coleman, a practising GMC-registered GP, and explained in plain English.
- Clear next steps — what your results may mean, and what to do next where appropriate.
- Optional GP appointment — want to talk it through? You can book a private appointment to discuss your results.
Choose how you'd like your sample taken
Pick the option that suits you. The test is the same. Only the way we collect your sample changes.
- Doctor-reviewed report
- Free tracked delivery
- Results in 2–3 working days
- Actionable next steps

Dr James Coleman
“Every Brooksby report is written personally. You get a plain-English interpretation and a clear next step — not just numbers on a page.”
Simple from start to finish
Order your test
Choose online in minutes. Your kit is dispatched and on its way to you.
Collect your sample
Venous collection
Post it back
Drop your pre-paid, tracked envelope in any postbox. We take it from there.
Your doctor-written report
Reviewed by a practising doctor. Delivered to your secure portal within 2–3 working days.
Follow-up if you need it
If anything in your report needs discussing, you can request a follow-up with our GP from your account — free, and entirely optional.
Your results, explained in a written report
What you actually get in this test
8 biomarkers across 4 panels, analysed by a UKAS-accredited UK laboratory and personally reviewed by Dr Coleman.
A GP-led service, not a lab with a website
Written interpretation, not a PDF
Your results come with Dr Coleman's written interpretation — what each marker means and what to do about it, in plain English.
doctor-written report included
Every report is written by Dr Coleman, a practising GP — not auto-generated and not outsourced.
A named doctor, not a team
Your report is signed by Dr Coleman personally. Not an anonymous review pool.
UKAS-accredited UK lab
Same accreditation standard used by NHS hospitals. Consistent, reliable analysis.
One-off, no subscription
You order the test, you get the report, you own the data. No ongoing fees.
Common questions
Everything you need to know before ordering your Nutrients and Energy Profile.
What does the Nutrients and Energy Profile check?
This panel measures the key nutrients that directly affect your energy levels: Active Vitamin B12, Folate, Ferritin (iron stores), Vitamin D and Magnesium. Deficiencies in any of these are common causes of persistent tiredness.
Who should consider this test?
Anyone experiencing persistent fatigue, low energy or brain fog. Also useful for vegetarians, vegans, people with restrictive diets, and anyone supplementing vitamins who wants to check whether their levels are actually adequate.
Do I need to fast?
No fasting is required. You can eat and drink normally before this test.
How is this different from the Wellness Profile?
The Nutrients and Energy Profile focuses specifically on vitamins and minerals that affect energy. The Wellness Profile is broader, adding liver, kidney, cholesterol, HbA1c and inflammation markers. If fatigue is your main concern and you want a focused, affordable starting point, this test covers the essentials.
How will I receive my results?
Secure online results with a GP-written explanation from Brooksby Medical in 2 to 3 working days.
More about Brooksby
Is my report reviewed by a doctor?
How accurate are the results?
Who writes the reports?
How long do results take?
Do I need a GP referral?
Can I share my results with my NHS GP?
What happens if something is abnormal?
What is the difference between venous and fingerprick?
Is my data kept private?
Drop us a message — a real person will reply.
We usually get back within one working day. Anything you want to ask before ordering — collection, what's included, fasting, your report, results timing — go ahead.
Ready to order?
A simple sample, a UKAS-accredited lab, and a doctor-written report personally interpreted by Dr Coleman.
Order my Nutrients and Energy Profile →