Trace elements are minerals the body needs only in tiny amounts – from a few micrograms to a few milligrams per day – yet without them, key processes would grind to a halt. The essential ones are mainly iron, zinc, selenium, iodine, copper, manganese, and chromium. They're mostly found in enzymes and help regulate metabolism, the immune system, the thyroid, and oxygen transport.
Trace elements are minerals that your body needs only in tiny amounts – from a few micrograms to a few milligrams per day – but without which central processes would grind to a halt. The essential trace elements are, above all, iron, zinc, selenium, iodine, copper, manganese and chromium. They mostly sit right inside enzymes and thereby steer the metabolism, the immune system, the thyroid and oxygen transport. It sounds like very little mass, yet it has an enormous effect.
Picture a clockwork: the large cogwheels – calcium, magnesium, potassium – catch your eye immediately. The trace elements are the tiny wheels that hardly anyone sees, but without which nothing runs at all. That is precisely why it is worth getting to know them in an orderly way.
The key points at a glance
- Trace elements = minerals that the body needs only in very small amounts.
- The most important ones: iron, zinc, selenium, iodine, copper, manganese, chromium.
- They act predominantly as enzyme components – small in quantity, large in significance.
- For many people the requirement can be met through a varied diet.
- The margin before an intake that is too high is narrower for some (e.g. selenium, iodine) than for bulk minerals.
- In the case of persistent complaints, please seek medical advice.
What is a trace element – and what does it do in the body?
Minerals fall roughly into two groups. Bulk minerals such as calcium, magnesium and potassium are needed by the body in milligram to gram amounts. Trace elements, by contrast, only “in traces” – often in the microgram range. The name says it all.
The small quantity is deceptive: most trace elements are part of enzymes and transport proteins. Iron sits in haemoglobin and carries oxygen through the body. Zinc is found in hundreds of enzymes involved in cell division and immune defence. Selenium is a building block of enzymes that protect cells from oxidative stress. If one of these little wheels is missing, entire process chains stall. They are called essential because the body cannot produce them itself and depends on their supply through food.
The most important trace elements at a glance
The following overview assigns each trace element to one of its authorised functions (Reg. 432/2012). These are not promises of healing but the officially substantiated bodily functions.
| Trace element | Authorised contribution (selection) | Typical sources |
|---|---|---|
| Iron | contributes to normal oxygen transport in the body | Meat, pulses, wholegrain, green vegetables |
| Zinc | contributes to the normal function of the immune system | Meat, cheese, nuts, seeds, wholegrain |
| Selenium | contributes to normal thyroid function | Fish, eggs, meat, Brazil nuts |
| Iodine | contributes to the normal production of thyroid hormones | Sea fish, seaweed, iodised salt |
| Copper | contributes to a normal energy metabolism | Nuts, wholegrain, pulses |
| Manganese | contributes to a normal energy metabolism | Wholegrain, nuts, green vegetables |
| Chromium | contributes to a normal blood sugar level | Wholegrain, nuts, meat |
For each one you will find a dedicated, detailed guide with us – for example on Zinc, Selenium, Iodine, Copper, Manganese and Chromium.
Why many people deliberately pay attention to trace elements
Because they are so inconspicuous, trace elements easily slip out of sight in everyday life. Anyone who eats a one-sided diet, consumes a lot of processed food or leaves out entire food groups may take in individual trace elements more sparingly. Classic situations: a purely plant-based diet (iron, zinc, iodine and selenium are worth considering), selenium-poor soils in parts of Europe, or regions with little natural iodine. That is why many people consciously look at which trace elements their menu reliably provides – and where a gap might open up.
What research is investigating
Well-established textbook knowledge is the role of trace elements as enzyme building blocks: iron in oxygen transport, iodine as a building block of thyroid hormones, zinc and selenium as part of many enzyme systems. These basic functions are undisputed.
Beyond that, research examines how the supply situation looks in various population groups, how well the body absorbs individual forms (bioavailability) and how trace elements compete with one another. Much of this is nutritional science in the best sense: curious, differentiated, without simple blanket answers. Where exactly an individual requirement lies remains a question that is most reliably clarified through laboratory values.
Why the amount has to be so precise with trace elements
A characteristic of many trace elements: the range between a sensible and an excessive intake is narrower than with bulk minerals. Selenium is the prime example – it is needed in micrograms, and more is not better. Iodine and copper also have a narrower window. That is why the rule is: stick to the manufacturer’s specifications and reference values, and with several supplements keep an eye on the total intake so that individual trace elements do not add up unnoticed.
How the body handles trace elements
Not every trace element is treated the same. Iron can be stored by the body to a certain extent and kept as a reserve. Others it hardly stores at all and therefore needs regular replenishment. This explains why the question “a course or continuous intake” is answered differently depending on the trace element – the basics on this in A course or continuous intake.
The interplay: trace elements do not act in isolation
Some share absorption pathways and influence one another. The best-known example is the relationship between zinc and copper, which we describe in Zinc and copper: the right ratio. There are also interactions with bulk minerals – for instance between iron and calcium. Anyone using several supplements should therefore know which supplements can be separated in time. How well a trace element arrives at all also depends on its form – see Bioavailability simply explained.
Where the trace elements are found
Striking: many plant-based foods provide several trace elements at once – nuts, seeds, wholegrain and pulses come up again and again. At the same time, some sources are of animal origin, which makes a conscious selection necessary with a purely plant-based diet. A varied diet that covers both worlds or deliberately combines plant sources is the best foundation. Anyone eating purely plant-based will find guidance in Nutrients for vegans.
In practice: form, dosage and what to look for when buying
If you supplement a trace element in a targeted way, three things determine the quality. First, the form: organic compounds such as bisglycinates (for example zinc or iron bisglycinate) are considered well tolerated and are well absorbed by many people – more on this in Bioavailability simply explained. Second, the dosage: it should be geared to recognised reference values, especially with selenium and iodine, where the margin is narrow. Third, the labelling: a reputable label clearly states the content per daily dose, the form and the additives – how to read it is shown by Supplements: reading the label correctly.
A common mistake is to combine several supplements without looking at the sum. Anyone taking a multimineral and a single-ingredient product can unknowingly supply one trace element twice. That is why it is worth briefly checking before buying what is already covered – whether a single-ingredient product or a complex makes more sense is put into context by Single-ingredient product or complex.
For whom individual trace elements are particularly relevant
Some life situations shift the requirement noticeably. Anyone who does a lot of sport and sweats heavily also loses trace elements through sweat. Anyone eating purely plant-based should consciously keep an eye on iron, zinc, iodine and selenium. In older age, absorption via the gut can decline, while at the same time people often eat less – guidance on this is given by Vital nutrients from 50. And anyone who eats a one-sided or heavily calorie-reduced diet over a long period automatically takes in fewer trace elements with less food. In all these cases it is not about blanket high-dosing, but about a smart look at one or another plausible gap.
An honest assessment
It is established that trace elements are indispensable building blocks of our metabolism – that is biochemistry, not marketing. Equally established: for many people a varied diet covers the requirement. What is not established, and therefore not a blanket recommendation, is that every person needs every trace element in addition. Supplementation makes sense where a gap is plausible – from the diet, the life situation or a laboratory value. With iron and selenium, particular restraint applies, because too much is also unfavourable. If a deficiency is suspected, there is no way around a medical assessment.
Common misconceptions about trace elements
Three errors come up again and again. First: “Because the amounts are so small, it can’t hurt to take a lot.” The opposite is true – precisely because of the small amounts, the margin is narrow with some trace elements, and more is not better. Second: “A multi-supplement covers everything.” Multi-supplements are practical, but their dosages are compromises; anyone with a specific requirement sometimes needs a targeted single-ingredient product, while for other trace elements the multi is perfectly sufficient. Third: “I can feel a deficiency.” Trace elements cannot be read off from a feeling – their status is determined via laboratory values. Anyone combining several supplements should know the typical pitfalls, which Supplements: common mistakes summarises.
Matching products from Scheunengut
In the Trace Elements category you will find iron, zinc, selenium, iodine, copper, manganese and chromium as individual products. Anyone wishing to cover several trace elements in a bundle should look at the Multimineral category. The broader framework across all minerals is set out by the Minerals category.
Frequently Asked Questions (FAQ)
What is the difference between trace elements and bulk minerals?
Both are minerals. Bulk minerals such as calcium, magnesium and potassium are needed by the body in comparatively large amounts (milligrams to grams per day). Trace elements such as iron, zinc or selenium are needed only in traces, often in the microgram range. Despite the small quantity they are indispensable, because they mostly act as enzyme components.
Which trace elements are essential for the body?
The most important essential trace elements include iron, zinc, selenium, iodine, copper, manganese and chromium. Essential means: the body cannot produce them itself and depends on their supply through food.
Can I meet my requirement for trace elements through diet?
For many people, yes. A varied diet with vegetables, wholegrain, nuts, pulses as well as animal or deliberately combined plant sources covers most trace elements. Anyone eating purely plant-based or a very one-sided diet should keep a particular eye on trace elements. If a gap is suspected, a medical assessment is the best route.
Can you take in too many trace elements?
Yes, with some the gap between a sensible and an excessive intake is narrower than with bulk minerals – for example with selenium and iodine. That is why you should stick to reference values and the manufacturer’s specifications and, with several supplements, add up the total intake so that individual trace elements do not accumulate unnoticed.
Health notice: This guide is for general information purposes only and does not replace individual medical or pharmaceutical advice. Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle. If you have health concerns, are pregnant or breastfeeding, or are taking medication, please consult a doctor or pharmacist. How our guides are created →
Sources
- Reference Values — German Nutrition Society (DGE)
- Copper, Manganese, Chromium, Molybdenum — German Nutrition Society (DGE)
- Toxicological and Nutritional-Physiological Aspects of the Use of Minerals and Vitamins in Foods – Part I: Minerals — German Federal Institute for Risk Assessment (BfR, formerly BgVV), 2002
- Overview on Dietary Reference Values for the EU population as derived by the EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) — European Food Safety Authority (EFSA), 2017
