Sodium molybdate

A mineral salt that provides molybdenum (an essential trace element) for fortified foods and supplements.

Should I eat Sodium molybdate?

Sodium molybdate is a refined mineral fortificant that supplies essential molybdenum. At the tiny amounts used in foods, it is generally safe; problems arise mainly with large supplemental doses.

Summary

This ingredient adds molybdenum, a trace mineral needed for enzymes that process sulfur amino acids and purines. EFSA’s Adequate Intake is about 65 micrograms per day for adults, and the EU lists sodium molybdate as a permitted source in foods and supplements. The main risk is excess intake: high, sustained doses can raise uric acid and may affect copper status. For most people, microgram-level fortification is far below upper limits and not a concern; if you use multiple supplements, check labels to avoid overshooting.

Key Research Points

High doses can raise uric acid

Chronic, very high intakes have been linked to increased blood uric acid and gout-like symptoms; adult upper limits are set to prevent this.

Fortified amounts are tiny versus limits

Adequate Intake for adults is about 65 micrograms/day, and typical fortification adds only tens of micrograms per serving—far below the 2 mg/day adult UL.

Possible copper interaction at high intakes

Very high molybdenum exposure can antagonize copper status, a concern mainly seen with pharmacologic doses rather than normal food fortification.

Overview

What is it?

Source: Molybdenum ore–derived mineral salt

Method: React, purify, crystallize

Processing Level: 8 / 10

Why is it used?

Purpose: Provides molybdenum for trace-mineral fortification.

Commonly found in: Protein bars, Meal shakes, Sports powders, Multivitamins, Fortified drinks

Why manufacturers choose it: It is highly soluble, stable, inexpensive, and enables precise microgram dosing.

Origin

Molybdenum was recognized as essential for humans in the 20th century through enzyme research (e.g., sulfite oxidase and xanthine oxidase). Sodium molybdate—made by reacting molybdenum oxides from mined ores with alkali and then purifying—became a common, standardized source for fortifying foods and supplements as nutrition labeling and DRIs formalized trace mineral needs in the late 1900s.

Process: React, purify, crystallize

Steps

1. React: Convert molybdenum trioxide with sodium hydroxide to form sodium molybdate solution.

2. Purify: Filter and decolorize to remove insolubles and trace metals.

3. Crystallize & Dry: Evaporate and crystallize (often as dihydrate), then dry and mill to spec.

Chemicals

Sodium hydroxide

Molybdenum trioxide (ore-derived)

Research & Safety

Potential Concerns

The main concern is excess intake from stacking multiple supplements or very high-dose products. Long-term high intakes have been associated with high uric acid and gout-like symptoms, which is why adult upper limits exist. Very high exposures can also antagonize copper status, so people with copper metabolism disorders should avoid high-dose molybdenum supplements. Data on high intakes during pregnancy and lactation are limited in EU risk reviews, so staying within recommended amounts is prudent.

Potential Benefits

Molybdenum helps key enzymes work, including sulfite oxidase and xanthine oxidase, which support normal processing of sulfur amino acids and purines. Because daily needs are tiny, small additions can ensure adequate intake in people with limited or unvaried diets. Sodium molybdate is a standardized, permitted source for adding molybdenum to foods and supplements. Most people already meet their needs from a typical diet, so fortification is a top-up rather than a therapeutic dose.

Digestive Effects

At the microgram levels used to fortify foods, digestive effects are unlikely. Some people report mild stomach upset with high-dose mineral supplements in general; taking supplements with food can improve tolerance. If you have a sensitive stomach, avoid large single doses and check the total amount across all products. Any persistent nausea or abdominal discomfort after starting a high-dose supplement is a cue to stop and speak with a clinician.

Limit Consumption

Infants and young children should only receive molybdenum from products and amounts specifically permitted for their age group. During pregnancy and lactation, authorities have noted limited data at high intakes; staying within recommended intakes is advised. People with gout or hyperuricemia should be cautious with molybdenum supplements that approach or exceed typical daily needs. Individuals with copper metabolism disorders should avoid high-dose molybdenum without medical guidance.

Fact Sheet

Regulatory Status

US FDA: Not specifically listed as a direct food substance in 21 CFR 184; widely used as a nutrient mineral in supplements and as a processing aid/plant nutrient with tolerance exemptions (e.g., 40 CFR 180.920).

EU Status: Permitted mineral source for addition to foods and supplements (Annex II, 1170/2009).

Codex INS: Not assigned (mineral nutrient, not a Codex additive class).

JECFA ADI: No specific ADI for sodium molybdate as a food additive; health guidance based on molybdenum ULs (see EFSA/SCF, IOM).

ESG & Sustainability

Environmental Footprint: Trace quantities used; upstream impacts tied to molybdenum mining/refining rather than food use.

Sustainability: Mineral sourcing depends on mining practices; consider suppliers with responsible mining standards.

Animal Welfare: Not directly applicable (inorganic salt).

Carbon Footprint: Very low at the use level (micrograms per serving); dominated by overall product footprint.

Allergens and Diet

Allergen Status: None

Diet Compatibility: Vegan, Vegetarian, Kosher, Halal, Gluten-free, Dairy-free, Non-GMO, Keto, Paleo, Low-FODMAP

Natural Alternatives

Lentils

Source: Legumes

Processing Level: Light

Common Uses: Bowls, soups, salads

Replacement Benefit: Whole-food source of molybdenum along with fiber and other micronutrients.

Why it's not used: Lentil molybdenum varies by soil; cannot deliver precise microgram targets in a standardized bar.

Whole grains (e.g., oats, buckwheat)

Source: Cereal grains/pseudocereals

Processing Level: Light

Common Uses: Granola, bars, cereals

Replacement Benefit: Adds molybdenum with fiber and phytonutrients.

Why it's not used: Inconsistent Mo content; adds carbs/bulk not desired in all formulas.

Sesame seeds

Source: Seeds of Sesamum indicum

Processing Level: Light

Common Uses: Toppings, butters

Replacement Benefit: Delivers minerals and healthy fats naturally.

Why it's not used: Adds allergens, calories, and flavor; still variable in Mo content.

Citations

Molybdenum — Fact Sheet for Consumers

2021-03-22

NIH Office of Dietary Supplements • NIH ODS

Dietary Reference Values for molybdenum

2013-08-08

EFSA NDA Panel • EFSA Journal

Commission Regulation (EC) No 1170/2009 (Annexes)

2009-11-30

European Commission • EUR-Lex

Molybdenum (IRIS summary)

1992-11-01

U.S. EPA • EPA IRIS

40 CFR 180.920 — Inert ingredients used pre-harvest

2024-01-01

U.S. EPA • ECFR

Technical Report: Nutrient Vitamins & Minerals (National List 205.605(b))

2015-02-24

USDA Agricultural Marketing Service • USDA AMS

Dietary Reference Intakes: Vitamin A, Vitamin K, Arsenic, Boron, … Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc

2001-01-01

Institute of Medicine • NCBI Bookshelf (DRIs)

GRAS Notice 744 – Steviol Glycosides (process aids list)

2017-01-01

FDA CFSAN • FDA (GRAS dossier reference)