Naturopathy
Slow metabolism, and what a hair mineral test adds
Tired, cold, gaining weight easily? What a slow metabolism really is, what genuinely explains it, and where a hair mineral test fits in.
“I think I have a slow metabolism” is one of the most common things people say about their own health, and one of the least specific. It usually stands in for a cluster of experiences — tiredness that sleep does not fix, feeling cold in a room nobody else finds cold, gaining weight without eating more, digestion that has slowed down.
Those are real. The label is the problem, because it bundles several different things together and then makes them sound like one condition with one answer.
What metabolism actually refers to
Metabolism is the whole set of chemical processes that turn what you eat into energy and building material. Most of what people mean by “a slow metabolism” is the resting part of that — the energy your body uses doing nothing at all, which is the large majority of what you burn in a day.
That figure is set mostly by things you cannot negotiate with: your size, your age, your genetics, and how much muscle you carry. It is also influenced by things that can change, and those are the ones worth identifying:
- Thyroid function. The thyroid sets the pace. An underactive thyroid produces exactly the picture people describe as a slow metabolism, and it is measured with a blood test.
- Iron and B12. Both produce fatigue that is easy to attribute to metabolism.
- Sleep. Poor or broken sleep changes appetite hormones and energy use, and sleep apnoea is under-recognised.
- A history of restrictive dieting. Repeated weight loss and regain has a measurable effect on resting energy expenditure.
- Medications. Several common ones affect weight and energy directly.
None of that is exotic. It is the list a careful practitioner works through, and most of it is answered with blood tests rather than guesswork.
Where hair mineral analysis fits
Hair mineral analysis measures the concentration of minerals and metals in a hair sample, giving a picture spread across roughly the last one to three months of growth rather than a single moment.
The report that comes back includes something people are often surprised by. Alongside the element levels, the laboratory provides an interpretive section describing what it calls a metabolic type — read from the ratios between minerals rather than from any single figure:
| Ratio | What the laboratory’s framework reads it as |
|---|---|
| Calcium to phosphorus | The main marker. Above roughly 2.6 to 1 is read as the slow pattern; below it, the fast one |
| Sodium to magnesium | An adrenal-activity marker in that framework |
| Calcium to potassium | A thyroid-activity marker in that framework |
In the slow pattern, calcium and magnesium tend to sit above the laboratory’s mean while phosphorus, sodium and potassium sit below it.
Two things need saying plainly about that.
The first is that this is the laboratory’s own interpretive framework, built from its clinical data over several decades. It is not a mainstream diagnostic method, and a mineral ratio is not a measure of thyroid or adrenal function. If your thyroid is the question, the answer comes from a blood test.
The second is that the report is a screening measurement, not a diagnosis. It does not diagnose a nutrient deficiency, it does not diagnose a thyroid or adrenal condition, and the evaluation that comes with it is generated from the sample alone — the laboratory has never seen your history, your medications or your symptoms.
So what is it good for
Used the way it is meant to be, it is a starting point that gives a practitioner something specific to work with rather than a description of how you feel.
It shows a mineral pattern across a window of weeks. It flags an element that is unexpectedly high or low and worth following up properly. It gives a baseline you can compare against three or more months later, at the same laboratory, to see whether anything has shifted. And the metabolic-type section gives a practitioner a framework to discuss with you — one set of questions among several, not a verdict.
What it cannot do is replace the blood testing that answers the thyroid question, and it should not delay it. If the tiredness and the cold and the weight change have been going on for months, that testing is the thing to get moving on now. A hair sample takes 3 to 4 weeks to come back as a report once the clinic has it.
What to do with this
If the pattern above sounds like you, the useful order is: get the straightforward causes measured, and use hair mineral analysis alongside that rather than instead of it.
The naturopaths at Brunswick Health can arrange blood pathology through a private laboratory — paid directly to the laboratory, without a Medicare rebate — and will refer you on to a GP or specialist where a result calls for it. If you have a hair mineral report already, or you want one read properly, Carmen Farrugia is the naturopath here who works with mineral analysis, by phone or in a consultation.
Hair mineral testing at Brunswick Health explains what the test measures, what it costs and how to collect a sample. There is no kit to wait for, so you can start the same day.
If the picture in the fast metabolism article sounds more like you, that one covers the same ground from the other direction.