Molybdenum: Effect, Occurrence and Importance of the Trace Element

Molybdenum is among the trace elements the body needs only in tiny amounts, but without which important metabolic processes do not run smoothly. Compared with better-known minerals such as iron or zinc, molybdenum is rarely in the spotlight, but it plays its own specific role in enzyme metabolism. In this guide you will learn what molybdenum is, where it occurs, how it is absorbed, and what you should keep in mind when it comes to supply and to buying supplements.

What is molybdenum?

Molybdenum is an essential trace element that the human body must take in through food. It is a component of some important enzymes, so-called molybdenum-dependent enzymes, which are involved in certain conversion processes in the metabolism. These include, among others, enzymes that process sulphur-containing amino acids and certain breakdown products in the body.

For molybdenum, the following health claim is approved in the EU: molybdenum contributes to normal sulphur amino acid metabolism. This statement describes the physiological function of the trace element within the framework of a normal supply. The total stock of molybdenum in the body is very small, which shows how effective even the smallest amounts are in enzyme metabolism.

Among the known molybdenum-dependent enzymes are, among others, sulphite oxidase, xanthine oxidase and aldehyde oxidase. These enzymes are involved in conversion and breakdown processes, for example in the processing of sulphur compounds or in the breakdown of certain metabolic products. Molybdenum acts as a component of a special cofactor, without which the enzymes could not fulfil their task. This explains why an element that occurs only in microgram amounts is nevertheless indispensable for the smooth running of these processes.

Occurrence in foods

Molybdenum is contained in many plant and animal foods, so that a deficiency with a balanced diet is rare. Particularly good sources are pulses such as beans, lentils and peas. Cereals and wholegrain products, nuts and offal also provide notable amounts.

The molybdenum content of plant foods depends strongly, however, on the soil on which they grew. Soils differ significantly by region in their mineral content, which affects the concentration in the end product. In most European diets, the need for molybdenum is covered without any problem, which is why this trace element is rarely addressed separately in nutritional counselling.

For people who eat a vegetarian or vegan diet, too, molybdenum is generally unproblematic, since pulses and wholegrain products, which often occur abundantly in these diets, are among the best sources. Unlike with some other nutrients, there is therefore no particular risk of an undersupply here. Anyone who eats a varied diet and regularly incorporates plant-based protein sources is very well supplied with molybdenum, entirely without conscious effort. This makes molybdenum one of the nutrients you need to worry about least in everyday life.

Forms and intake

In dietary supplements, molybdenum usually occurs in the form of compounds such as sodium molybdate or ammonium molybdate. These salts are well absorbed by the body. Molybdenum is also frequently a component of multi-mineral or multivitamin supplements, in which it is contained in small amounts.

Since the need is very low and is usually covered through a normal mixed diet, targeted single supplementation of molybdenum is not necessary for most people. If you take a supplement, stick to the dosage stated on the packaging. Molybdenum can be taken with a meal. A deliberate overdose brings no additional benefit and should be avoided.

The absorption of molybdenum from food is comparatively efficient, that is, the body absorbs a good part of the molybdenum supplied via the small intestine. Excess molybdenum is predominantly excreted again via the kidneys with the urine, so that with a normal intake no surplus accumulates in the body. This good regulation is one reason why diet-related problems with molybdenum play practically no role in healthy people. Anyone who eats a balanced diet generally does not need to give this trace element any thought.

Need and supply

The daily need for molybdenum is in the range of a few micrograms and is usually reached effortlessly through a balanced diet. Professional societies give reference values that are in the range of a few dozen micrograms per day for adults. Given the wide distribution in foods, a diet-related deficiency in healthy people is the exception.

A genuine molybdenum deficiency is very rare in humans and occurs practically only under special medical circumstances, for example with long-term artificial nutrition without sufficient intake. For the vast majority of people, the supply is secured through a normal, varied diet. Anyone who worries about their supply should not tackle it on their own with high-dose supplements, but have it checked medically.

What you should look out for when buying

If you are considering a molybdenum-containing supplement, it is worth looking at the composition and the dosage. Reputable products clearly state the amount contained in micrograms and are based on the recommended reference values, instead of advertising with extremely high dosages. Since molybdenum is contained in many multi-supplements anyway, you should check whether you need it additionally at all.

Pay attention to transparent statements on the amount and form of the molybdenum contained, as well as to a comprehensible origin and quality control of the manufacturer. You should keep your distance from products that advertise with unrealistic promises or clearly excessive amounts. With a trace element whose need is so low, the following applies: more is not better.

Another point is the question of whether you need the supplement at all. Before you reach for a single product, it is worth taking an honest look at your diet. Anyone who regularly eats pulses, wholegrain products and nuts very probably already fully covers their molybdenum need. Supplements with very high molybdenum amounts that lie far above the reference values are not sensible for everyday life and can, with long-term intake, bring more disadvantages than advantages. When in doubt, rely on well-composed products with a moderate dosage.

Safety and interactions

In the amounts taken in through a normal diet, molybdenum is considered well tolerated. Very high intakes over a longer time, by contrast, are not sensible and can affect the mineral balance, for example with regard to copper, with which molybdenum interacts in metabolism. That is why extremely high dosages are to be avoided.

If you are pregnant, breastfeeding, have illnesses or take medication regularly, you should discuss taking molybdenum supplements medically beforehand. With existing kidney problems, too, caution is advised, since the excretion of trace elements can be impaired. Dietary supplements do not replace a balanced diet, but can supplement it if needed. With persistent or unclear complaints, medical advice is always the right choice.

In summary, molybdenum is a good example of a quiet but reliably supplied trace element. It fulfils a clearly defined task in enzyme metabolism, is supplied abundantly through everyday diet, and normally does not need to be additionally considered by healthy people. Anyone who values a good basic supply achieves considerably more with pulses, wholegrains and nuts than with isolated supplements. This keeps the focus on what matters: a balanced diet that supplies the body with the entire spectrum of nutrients.

Frequently asked questions (FAQ)

What does the body need molybdenum for?

Molybdenum is a component of certain enzymes. The statement approved in the EU is that molybdenum contributes to normal sulphur amino acid metabolism. The body needs it only in tiny amounts, which are, however, important for enzyme metabolism.

Which foods contain molybdenum?

Good sources are pulses such as beans, lentils and peas, as well as cereals, wholegrain products, nuts and offal. The content in plant foods depends on the soil on which they grew. In the usual mixed diet, molybdenum is widely distributed.

Do I have to supplement molybdenum?

For most people, no. The need is very low and is usually covered without problem through a balanced diet. A genuine deficiency is rare and occurs mainly under special medical circumstances. Targeted single supplementation is usually superfluous.

Can you take in too much molybdenum?

Through a normal diet this is not to be feared. Very high intakes through supplements over a longer time, however, are not sensible and can affect the mineral balance, for example with regard to copper. Stick to the stated dosage and avoid excessive amounts.

What should I look out for when buying?

For a clear statement of the amount in micrograms, a dosage based on the reference values, and transparent information on form and origin. Since molybdenum is often contained in multi-supplements, it is worth checking whether additional intake is necessary at all.