Rohan Berg
Health Optimisation & Longevity Specialist
FBCA ODX Specialist · Author · Longevity Consultant
I help people understand what’s really going on inside their bodies — not just whether they’re “normal”, but whether they’re truly well.
Coming Soon
Through functional blood chemistry analysis, personalised consultations, and free health tools, I work with clients across the UK who are tired of being told their results are fine when they clearly don’t feel fine.
If that sounds familiar, you’re in the right place.
How It All Started
I spent over two decades in the health and wellness industry before founding Functional Aesthetics. During that time, I became fascinated by one question: what separates people who are “not sick” from people who are genuinely thriving?
The answer was in the blood work — but not the kind most GPs run. Standard blood tests flag disease. They’re not built to identify the subtle imbalances that sit between “diagnosable condition” and “optimal health”.
When I applied functional blood chemistry analysis to my own health, the results were remarkable. Using targeted supplementation, optimised nutrition, HRV monitoring, and hormone optimisation, I achieved a 27-year biological age reversal — verified by GlycanAge, one of the most validated biological age tests available. At 47, my biological age tested at 20.
That result became the foundation of Functional Aesthetics. I founded the practice in Lincoln to help others use the same evidence-based approach to genuinely optimise their health — not just scrape by with “normal” results.
Then I Crashed
After years of building the practice, managing relentless work demands, and refusing to ease off decades of intense training, my body gave out. Overtraining syndrome. HPA axis dysregulation. Hormones in the gutter. HRV through the floor. The kind of burnout that doesn’t fix itself with a week off.
The bitter irony? Standard blood tests came back “normal”. The same disconnect I’d been helping clients overcome had caught me. I knew better — and I’d still ignored every warning sign.
Rebuilding from that crash changed my perspective entirely. It showed me that the people who push the hardest — athletes, driven professionals, high achievers — are often the ones at greatest risk. And they’re almost always told nothing’s wrong.
The Recovery Code
That experience led me to write The Recovery Code. I couldn’t find the book I needed when I was at my worst — there’s plenty of training advice, but almost nothing on what happens when training breaks you, and how to come back properly.
The book covers the full arc of overtraining syndrome and burnout recovery: recognising the warning signs, understanding what’s happening at a hormonal and nervous system level, and following a structured 4-phase recovery protocol built from clinical evidence and lived experience.
Whether you’re an athlete who can’t finish sessions, a professional who’s hit a wall, or someone who trains to stay sane and suddenly can’t — this book was written for you.
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What I Do Now
Today, Functional Aesthetics is an online practice. All consultations happen via secure video call — whether you’re in Edinburgh, Cardiff, Belfast, or Lincoln.
Health Optimisation Consultations
A focused session to review your health goals, discuss any existing blood work, and build a clear action plan. Ideal if you want expert guidance on results your GP called “normal”.
Functional Blood Chemistry Analysis (FBCA)
A comprehensive analysis of your blood markers using functional optimal ranges — not the broad NHS reference ranges designed to detect disease rather than optimise health.
Functional Blood Testing Packages
Comprehensive blood work through accredited UK laboratories — 50+ biomarkers covering hormones, vitamins, minerals, metabolic markers, and inflammation. Includes a full FBCA consultation.
Learn more about blood testing →
Free Health Tools
Good health information shouldn’t sit behind a paywall. These calculators are free, evidence-based, and built for UK users:
Vitamin D Calculator
Calculate your personalised vitamin D dosage based on current levels, body weight, and target goals.
Calculate your dose →Testosterone Calculator
Check your testosterone levels using functional ranges with the ADAM-validated questionnaire.
Check your levels →Credentials & Background
FBCA ODX Specialist — Certified in Functional Blood Chemistry Analysis through Optimal DX
Author — The Recovery Code, a comprehensive guide to overtraining syndrome recovery
GlycanAge Verified — 27-year biological age reversal (biological age 20 at chronological age 47)
Co-Founder, HINNAO Technology — Award-winning longevity supplement company
NCFE Level 3 Phlebotomist — Professional blood collection certification
20+ Years — Health optimisation, functional medicine, and longevity consulting
Frequently Asked Questions
What is Functional Blood Chemistry Analysis?
FBCA interprets blood test results using narrower, evidence-based “optimal” ranges rather than broad NHS reference ranges. Standard ranges flag disease — functional ranges identify imbalances before they become diagnosable conditions.
Do I need to be based in Lincoln to use your services?
No. All consultations are conducted online via secure video call. I work with clients across the entire UK. Blood work can be arranged through accredited laboratories with collection points nationwide.
What qualifications does Rohan Berg hold?
Certified FBCA ODX Specialist through Optimal DX, NCFE Level 3 Phlebotomist, co-founder of HINNAO Technology, and author of The Recovery Code. Over 20 years of experience in health optimisation and longevity.
Can I book a consultation without blood test results?
Absolutely. The Health Optimisation Consultation works with or without existing blood work. If you have recent results, I’ll review them using functional ranges. If not, we’ll discuss your goals and I can recommend appropriate testing.
What is The Recovery Code about?
The Recovery Code is a practical guide to overtraining syndrome and burnout recovery, featuring a structured 4-phase recovery protocol, HRV monitoring guidance, and hormonal recovery strategies drawn from clinical evidence and personal experience.
How did Rohan reverse his biological age by 27 years?
Through functional health principles: optimised nutrition, targeted supplementation, HRV-guided recovery, hormone optimisation, and stress management — verified through GlycanAge testing showing a biological age of 20 at chronological age 47.
Content written by Rohan Berg, FBCA ODX Specialist. Last reviewed: February 2026. This information is educational and does not constitute medical advice. Always consult your GP or qualified healthcare professional before making changes to medication, supplementation, or treatment plans.
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Not sure where to start? Send a message and I’ll point you in the right direction.