I used to ask every new patient with neuropathy the same thing: "What were you told when the burning started?"

After thousands of patients and the same answer every time, I stopped asking.

It was always nerve tablets. Always a prescription written up in less than three minutes. Always someone sent away to take the tablets, wear the socks, and come back in six months. The waiting rooms are not full of people who ignored their symptoms. They are full of people who trusted the wrong fix.

I am telling you this now because six months ago I sat in my own GP's surgery and heard the very words I had passed on to patients a hundred times.

My name is Megan Keller. I have spent 18 years as a nurse, most of them on a diabetes ward, watching what years of raised blood sugar do to the nerves. And I had spent months ignoring the burning in my own feet. I blamed the long shifts. The hard floors. Everything except what it actually was.

HbA1c: 49 mmol/mol. Fasting glucose: 7.7 mmol/L. And that burning: starting in the toes, creeping up the arch, waking me at 2 in the morning.

My GP was not alarmed. "We will keep an eye on it and talk about medication options."

But I knew exactly what "medication options" meant. I had handed that very advice out a thousand times.

The patient who has been on nerve tablets for four years. Still burning. The dose goes up and up, the side effects pile on, and now they cannot sleep without them. And they barely work.

The patient who tried every cream, every foot soak, every supplement on the shelf. Temporary relief. And back to where they started.

And underneath all of it, the quiet, relentless progression. First the feet. Then the ankles. Then the calves. The numbness climbing while the burning stays. The wounds that will not heal because the circulation has dropped so far the body can no longer repair itself. And behind every set of notes, the same fear said under the breath: "I do not want to end up depending on my children to walk."

I have seen patients lose toes. I have filed the referral paperwork myself.

One of my long-standing patients (Margaret, 58, four years of progressive neuropathy) said something to me that I think about every day:

"I spent all that time treating the burning. Nobody ever told me I needed to treat what was causing it."

Six months ago I refused to write that prescription for myself. I knew what it would do: block the signal, not the cause. So I started asking a different question. Not "how do I manage the burning", but "why is my body doing this in the first place?"

Here is what nobody explains:

When blood sugar stays raised for too long, it triggers chronic inflammation inside the tiny blood vessels that feed your nerves: the microvascular vessels, thinner than a human hair.

Think of them as the irrigation lines of a field. When they are clear, the nerve gets everything it needs to work. When blood sugar stays high, inflammatory compounds build up on the walls of those vessels. The vessels narrow. The flow slows. The nerve starts to receive less and less of what it needs to survive.

Research shows this inflammatory build-up can narrow those vessels by as much as 60 per cent.

The nerve is not broken. It is starving. Cut off from the circulation it needs to function.

That is the burning. That is the pins and needles. It is not a nerve problem. It is a microvascular circulation problem, driven by blood sugar and inflammation.

When I started going through the research myself, I found something that changed the way I think about all of this.

Ceylon cinnamon. The true cinnamon, Cinnamomum verum, grown in Sri Lanka. Not the Cassia variety that fills the supplement shelves. The real thing, studied specifically for its effects on microvascular inflammation and blood sugar.

The active compound is cinnamaldehyde. It supports healthy circulation at the microvascular level, reducing the inflammatory build-up that narrows the vessels feeding your nerves. And it goes after the raised blood sugar that causes that inflammation in the first place, helping to unlock the cell door so glucose can get in instead of circling round in your blood.

When the vessels open again, the flow returns. The nerve starts to receive what it needs. The burning eases, not because you blocked the signal, but because you went after what was cutting off the supply.

And every time I mention this to a patient, I hear the same thing: "I have already tried cinnamon. It did nothing for me."

I know why. Three reasons:

1. The wrong species. What is sold as "cinnamon" in most supplements is Cassia: a different plant, without the concentration of cinnamaldehyde that acts on microvascular inflammation. Most brands will not even tell you which species you are getting.

2. The wrong dose. A 500mg capsule is a seasoning amount, not a results amount. The research used extract equivalent to thousands of milligrams of whole cinnamon a day. Most supplements give you a fraction of what actually moves the needle.

3. The wrong delivery. Cinnamaldehyde is fat-soluble. Dry powder capsules pass straight through before the compound can be absorbed. It needs to be suspended in fat to reach the blood, and those microvascular vessels.

If you tried cinnamon before and it did nothing, you were not wrong to try. The product was wrong.

After understanding the mechanism and the delivery failure, I found Biozentra.

Real Ceylon cinnamon (Cinnamomum verum, from Sri Lanka) concentrated 12 to 1 into an extract suspended in MCT oil, sealed inside a softgel. One softgel delivers the equivalent of 7,200mg of true Ceylon. The moment the gel dissolves, the active compounds travel in the fat they need: not trapped in dry fibre, but bioavailable, ready to reach the microvascular level.

One softgel a day with breakfast. No measuring. No mixing. No taste.

1. Studies on microvascular dysfunction in diabetic neuropathy: sustained hyperglycaemia promotes inflammation and wall thickening in the vessels that supply the peripheral nerve (vasa nervorum), reducing flow and contributing to nerve degeneration (symptoms of burning, pins and needles and numbness).

2. de Moura SL, et al. Effects of cinnamon supplementation on metabolic biomarkers in individuals with type 2 diabetes: a systematic review and meta-analysis. Nutr Rev. 2025. Cinnamon in capsule form reduced fasting glucose (~1.0 mmol/L) and HbA1c (~0.5%).

3. Research on cinnamaldehyde (the active compound of Cinnamomum verum): anti-inflammatory effects and support for endothelial function and circulation at the microvascular level, as well as improved insulin sensitivity (HOMA-IR).

4. Evidence on the fat-soluble nature of cinnamaldehyde and cinnamon polyphenols: absorption improves when carried in a lipid (MCT oil) compared with dry powder. Comparative coumarin studies: Cassia ~1% versus Ceylon ~0.004%, which supports the better safety profile of Ceylon for prolonged daily use.