Molybdenum: Dosage, Timing & Interactions

Check it against something

Evidence level C

Molybdenum with:

75 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Essential enzyme cofactor function

Required for proper function of molybdenum-dependent enzymes

Cofactor for aldehyde oxidase, xanthine oxidase, and sulfite oxidase Evidence A-grade 1-4 weeks

Amino acid metabolism and protein processing

Supports proper metabolism of sulfur-containing amino acids

Essential for sulfite oxidase converting sulfite to sulfate Evidence A-grade 2-6 weeks

Detoxification and toxin processing

Supports liver detoxification and toxin elimination

Aldehyde oxidase helps break down aldehydes and other toxins Evidence B-grade 2-8 weeks

Purine metabolism and uric acid regulation

Supports proper purine breakdown and uric acid formation

Xanthine oxidase converts xanthine and hypoxanthine to uric acid Evidence A-grade 2-6 weeks

Antioxidant enzyme support

Supports antioxidant enzyme systems and cellular protection

Molybdenum enzymes help neutralize harmful compounds Evidence B-grade 2-6 weeks

Every pair we checked

12 combinations scored by the engine

Molybdenum + Copper Bisglycinate High molybdenum may interfere with copper absorption Needs attention 52

Molybdenum + Chondroitin Sulfate High sulfate intake may increase molybdenum requirements Needs attention 58

Molybdenum + Iron Sulfate High sulfate intake may increase molybdenum requirements Needs attention 63

Molybdenum + Caffeine No documented interaction either way No known interaction 70

Molybdenum + Creatine Monohydrate No documented interaction either way No known interaction 70

Molybdenum + Vitamin D3 No documented interaction either way No known interaction 70

Molybdenum + Calcium Carbonate No documented interaction either way No known interaction 70

Molybdenum + Whey Protein No documented interaction either way No known interaction 70

Molybdenum + Lactase No documented interaction either way No known interaction 70

Molybdenum + Bovine Collagen No documented interaction either way No known interaction 70

Molybdenum + DHA No documented interaction either way No known interaction 70

Molybdenum + Vitamin B2 (Riboflavin) Enhanced molybdenum enzyme function Works better together 78

Dosage

With food

Daily45-150mcg

Enzyme support45-150mcg daily

Amino acid metabolism45-100mcg daily

Detoxification support45-150mcg daily

Deficiency prevention45mcg daily

Upper limit 2000 mcg NIH ODS

Before you take it

VeganYes

When to expect it

First Effects1-2 weeks for initial enzyme function improvements

Peak Benefits4-8 weeks for sustained metabolic and detoxification benefits

Deficiency DevelopmentExtremely rare except with genetic disorders or TPN

Toxicity OnsetRisk increases with doses above 2000mcg daily

How to measure it

$100-200

MarkerSerum molybdenum, uric acid levels, copper status, liver enzymes

OptimalAdequate molybdenum status, normal enzyme function

Deficient belowLow molybdenum levels, enzyme dysfunction

FrequencyRarely needed unless specific enzyme disorders suspected

What people actually reported to the FDA

CAERS, 3 reports naming it as the suspect

Most reported effects

Headache 1

Dizziness 1

Fatigue 1

Osteoarthritis 1

Named as the suspect 3 reports of 4 that mention it at all

Serious outcome 75% hospitalisation, emergency room or worse

Other Serious or Important Medical Event1

Other Serious Outcome1

Other Outcome1

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Elemental molybdenum 100% of 95.95 g/mol

Absorption Very high 80 of 100 · best absorbed form of this compound

Delivered daily 0.1 mg

Cost per 1 mg delivered $4.27 comparative — uses the absorption score, not a measured percentage

A 500 mg capsule of Molybdenum contains 500 mg of molybdenum. How much of that crosses into your blood is not measured for this form — the absorption score ranks it against other forms, it is not a share of the dose. How this is calculated →

Works better with

3 documented

+

Riboflavin B2

Enhanced molybdenum enzyme function

B2 required for proper molybdenum enzyme activity · level B

+

Sulfur Amino Acids

Enhanced amino acid metabolism and processing

Molybdenum enables proper sulfur amino acid metabolism · level A

+

Iron

Balanced trace mineral function

Both essential for enzyme function and metabolism · level C

What not to take with Molybdenum

2 documented

!

Copper

High molybdenum may interfere with copper absorption

Molybdenum-copper antagonism affects copper bioavailability · moderate significance

!

Sulfate

High sulfate intake may increase molybdenum requirements

Sulfate competes with molybdate for absorption · mild significance

Medication interactions

Discuss these with a pharmacist before combining

copper-chelating-medications Minor

May enhance copper depletion effects

What to do: Monitor copper status if using chelating drugs

xanthine-oxidase-inhibitors Minor

Allopurinol affects molybdenum-dependent xanthine oxidase

What to do: Monitor uric acid levels

Available forms

bioavailability compared

Sodium Molybdate (Most Common Supplemental Form) 80

Sodium Molybdate (Most Common Supplemental Form): Essential enzyme function, Amino acid metabolism, Detoxification support, Well absorbed

Food sources

before you supplement

Legumes (beans, lentils) 50-150mcg per 100g · 70

Whole grains 20-80mcg per 100g · 65

Leafy green vegetables 10-50mcg per 100g · 60

Molybdenum supplements 45-500mcg per dose · 80

Too little

deficiency signs

Molybdenum deficiency symptoms (extremely rare):
Sulfite sensitivity and toxicity
Amino acid metabolism disorders
Neurological problems and developmental issues
Growth retardation in severe cases
Usually only occurs with genetic enzyme deficiencies
May occur with long-term TPN without molybdenum

Too much

toxicity signs

Molybdenum excess symptoms:
Copper deficiency and associated anemia
Gout-like joint pain and symptoms
Growth retardation with chronic excess
Generally very safe with normal supplementation doses

Who benefits most

enzyme-function-support

Enzyme cofactor support for optimal metabolic function

45-150mcg daily

amino-acid-metabolism

Sulfur amino acid metabolism and processing support

45-100mcg daily

detoxification-support

Liver detoxification and toxin processing enhancement

45-150mcg daily

purine-metabolism

Purine breakdown and uric acid regulation support

45-100mcg daily

molybdenum-deficient-regions

Supplementation in areas with low soil molybdenum

45-150mcg daily

Where to buy it

compare forms first

Look for Molybdenum at 45-150mcg per serving. The form that matters here is Sodium Molybdate (Most Common Supplemental Form).

Find on Amazon

Affiliate link — we may earn a commission at no cost to you.

How it works

Essential cofactor for aldehyde oxidase enzyme breaking down aldehydes and toxins
Required for xanthine oxidase converting purines to uric acid
Critical for sulfite oxidase converting toxic sulfite to safe sulfate
Enables proper metabolism of sulfur-containing amino acids
Supports cellular detoxification and xenobiotic metabolism
Required for proper DNA and RNA synthesis through purine metabolism

Key findings

what the evidence supports

Essential for specific enzyme functions and amino acid metabolism
Deficiency extremely rare in healthy populations
Important role in detoxification and purine metabolism
Generally safe with wide margin between requirement and toxicity

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Molybdenum?

Documented effects: Essential enzyme cofactor function; Amino acid metabolism and protein processing; Detoxification and toxin processing; Purine metabolism and uric acid regulation. Required for proper function of molybdenum-dependent enzymes

How much Molybdenum should you take per day?

The common daily range is 45-150mcg. By goal — enzyme support: 45-150mcg daily; amino acid metabolism: 45-100mcg daily; detoxification support: 45-150mcg daily; deficiency prevention: 45mcg daily.

When is the best time to take Molybdenum?

With food. First effects are typically reported within 1-2 weeks for initial enzyme function improvements.

What are the side effects of Molybdenum?

At excessive doses: Molybdenum excess symptoms:, Copper deficiency and associated anemia, Gout-like joint pain and symptoms, Growth retardation with chronic excess, Generally very safe with normal supplementation doses. Safety rating at normal doses is 8 out of 10.

What should you not take with Molybdenum?

Separate it from Copper, Sulfate by two to four hours. High molybdenum may interfere with copper absorption

Does Molybdenum interact with medications?

Documented interactions with copper-chelating-medications, xanthine-oxidase-inhibitors. Discuss these with a pharmacist before combining.

How much Molybdenum is too much?

The tolerable upper intake level is 2000 mcg per day for adults, per NIH ODS. Above that, the risk of adverse effects rises: Molybdenum excess symptoms:, Copper deficiency and associated anemia, Gout-like joint pain and symptoms.

How do you know if you need Molybdenum?

The marker is Serum molybdenum, uric acid levels, copper status, liver enzymes, optimal range Adequate molybdenum status, normal enzyme function. Common deficiency signs: Molybdenum deficiency symptoms (extremely rare):, Sulfite sensitivity and toxicity, Amino acid metabolism disorders, Neurological problems and developmental issues.