If you have been taking supplements for months with no noticeable change, the issue may not be the supplement. In Classical Chinese Medicine, what you absorb matters more than what you swallow — and absorption depends on the state of your digestive system, which differs from person to person.
This is one of the most common conversations in our Belmont and Geraldton clinics. Someone arrives with a bag of bottles — magnesium, iron, vitamin D, a probiotic, collagen, something for energy. They have been taking them diligently for six months or more. They feel much the same. Their question is usually some version of: am I taking the wrong ones?
Often, that is not the most useful question to start with.
The gardening problem
Most Australians have some experience with a garden bed that will not thrive.
You add fertiliser. Nothing happens. You add more. Still nothing. Eventually someone points out that the soil is compacted and waterlogged — the roots cannot take anything up, and the fertiliser is simply sitting there or washing away with the next rain. The fertiliser was never the problem. The soil’s capacity to receive it was.
Digestion works in a comparable way. A nutrient in a capsule has to be broken down, carried across the gut wall, transported, and delivered to tissue that can use it. Every one of those steps depends on the working condition of the system doing the carrying. If that system is sluggish, the same capsule produces a different outcome in two different people.
This is not a controversial idea in conventional medicine either — it is why iron is prescribed differently for someone with coeliac disease, why vitamin D status varies with body composition and gut health, and why bariatric surgery patients need lifelong monitoring. Absorption is variable. Classical Chinese Medicine simply makes that variability the starting point of the assessment rather than an afterthought.
What we are actually looking at
Our clinic maps patterns across three mechanisms. Two of them are directly relevant here.
Heart Drive — the force that carries what you have absorbed to where it is actually used. When it runs low, people typically describe cold hands and feet, tiredness that sleep does not fix, and a heaviness after eating. Delivery slows down. Whatever you have absorbed still has to get somewhere.
Fluid Flow — circulation and drainage. When drainage is sluggish, people notice puffiness, bloating that worsens through the day, a coated tongue, and a sense of fogginess after meals. The transport system is congested.
Someone with both patterns can take an excellent magnesium supplement and notice very little, because the limiting factor is not magnesium availability. It is the condition of the system meant to move it.
You can read more about how we map these in our approach.
A pattern we see often
A common presentation in our Belmont clinic: a woman in her forties, tired for two years, taking iron because her GP flagged low ferritin. Her ferritin has moved slightly but her energy has not. She also mentions — usually as an aside, because she does not think it is related — that she has been bloated most afternoons for years and that her bowels have never been regular.
Those two facts are not separate from each other. A digestive system that is already struggling to move things along is not in a strong position to take up additional iron, and iron supplementation itself commonly adds to that load.
In a case like this, we would assess the digestive pattern first. Her GP continues to manage her iron levels and monitor her bloods — that part does not change, and we would encourage her to keep those appointments. What Chinese medicine adds is a reading of why the system is not taking things up, which is a different question from what is her ferritin today.
Related reading: Bloating & Abdominal Discomfort and Chronic Fatigue Syndrome (CFS/ME).
Why “more” is not the obvious next step
When something is not working, adding more of it is an understandable instinct. It is also the instinct that keeps people cycling through brands for years.
If absorption is the constraint, doubling the dose does not double the benefit — it increases the amount passing through a system that was already at capacity. This is why some people find that a higher dose of magnesium loosens the bowels without changing their sleep, or that a stronger iron preparation makes the constipation worse without moving their energy.
None of this means supplements are useless. Many people take them for good clinical reasons, and some deficiencies genuinely require them. The point is narrower: the same product produces different outcomes in different bodies, and that difference is worth assessing rather than guessing at.
What tends to be more useful
In practice, three questions are more informative than the choice of brand:
1. How does your digestion behave after meals? Bloating, heaviness, drowsiness and irregular bowels all describe a system under load.
2. What is your baseline temperature pattern? Persistently cold hands and feet, or feeling the cold more than people around you, points to Heart Drive rather than to a nutrient gap.
3. Has anything changed at all? Six months of no change is information. It suggests the constraint sits somewhere other than the thing you are adding.
For general dietary principles from the classical framework, see our TCM Diet & Nutrition Guide.
Working alongside your GP
Two things worth stating plainly.
Do not stop prescribed supplementation on the basis of an article. If your GP has prescribed iron, vitamin D, B12 or anything else, that decision was made on the basis of your bloods and your history. Any change belongs in a conversation with them.
Persistent fatigue needs medical investigation. Tiredness that does not resolve can reflect thyroid, haematological, cardiac or other conditions that require diagnosis and management from your doctor. Chinese medicine assessment sits alongside that work — it does not replace it, and we will say so directly if something in your presentation should be looked at medically first.
In summary
If supplements are not doing what you hoped, the useful question is not usually which one should I switch to. It is what is my body currently able to take up, and why. That is a question about the state of your digestive and circulatory system — and it is the question a Classical Chinese Medicine assessment is built to answer.
Book an assessment
Dr. Yang consults at Belmont (Perth) and Geraldton, WA.
About this article
Who: Written by Dr. Valen Yang, AHPRA-registered Chinese Medicine practitioner, Nature’s Chinese Medicine & Acupuncture Clinic, Belmont and Geraldton WA. Registered with the Chinese Medicine Board of Australia.
How: Drawn from classical pattern-differentiation texts and from patterns observed in clinical practice. Presentations described are composites; no individual patient is identified. Drafting assistance was used for structure and language; all clinical content was reviewed and approved by Dr. Yang before publication.
Why: Written for patient education. This article does not diagnose, and it is not a substitute for advice from your GP or specialist.
Last reviewed: 20 July 2026 by Dr. Valen Yang