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Chromium — The Complete Supplement Guide

The blood-sugar supplement whose essentiality is now doubted — what trivalent chromium actually does, and the honest evidence for its popular claims.

Reviewed by Bodil Isaksson, Licensed Biomedical Scientist (Sweden)Last reviewed July 2026Supplement guide

SupplementsMineralsChromium

Trivalent chromium (the food/supplement form) is marketed for blood sugar and weight, but authorities now question whether it is even an essential nutrient. For the short dietary version, see the Minerals page.

Read first. This page is about trivalent chromium (food/supplements) — not the toxic hexavalent chromium of industrial pollution. Trivalent chromium has low toxicity, but its benefits are modest at best. Check with a professional if you take diabetes medication. Information, not a prescription.

Key takeaways

  • Marketed for blood sugar and weight, but the evidence is weak and it may not be essential.
  • US adequate intake ≈ 20–35 µg/day (EFSA sets none).
  • No upper limit for the trivalent (food/supplement) form — low toxicity.

Function

Chromium's role is real but limited — and now debated:

  • Insulin action: trivalent chromium is thought to help insulin work, supporting normal glucose metabolism.
  • Macronutrient metabolism: a minor part of carbohydrate, fat and protein handling.
  • Essentiality questioned: unlike other minerals, EFSA does not classify chromium as an essential nutrient, having found no evidence of a deficiency disease in healthy people.

Different forms — and which to choose

PicolinateThe most common and best-absorbed supplement form (used in most studies).
Polynicotinate / chlorideAlternatives; chloride is poorly absorbed.
GTF yeastA food-based form.

Absorption in the body

How muchVery low — only about 0.4–2.5% of dietary chromium is absorbed; vitamin C slightly helps.
ExcretionAbsorbed chromium is excreted in urine.

Deficiency symptoms

SymptomsNo clear dietary deficiency is recognised in healthy people; older reports came only from flawed intravenous-nutrition cases.
EssentialityEFSA concluded there is no basis to set a requirement.

Recommended intake

US AI ≈ 20–35 µg · EFSA: none

No requirement is set in Europe; the US gives an adequate-intake estimate:

  • US AI: ~25 µg ♀ / 35 µg ♂ (lower after age 50)
  • EFSA: no requirement set (not considered essential)

Best sources: wholegrains, broccoli, meat, nuts, some fruit — widely but thinly distributed.12

Therapeutic use

Blood sugarChromium picolinate is studied in type 2 diabetes: effects on glucose control are small and inconsistent across trials.
Weight / PCOSMarketed for weight loss and PCOS, but the evidence is weak and not clinically meaningful.

Therapeutic doses

Studied: 200–1000 µg/day (picolinate)
If triedDiabetes trials used ~200–1000 µg/day — but expect little; it is not a substitute for diet, exercise or medication.
Manage expectationsBest regarded as optional with modest, uncertain benefit.

Toxicity & upper limit

No UL set (trivalent) — low toxicity
Upper limitNo UL has been established for trivalent chromium; it has low toxicity at usual supplement doses.1
Rare reportsIsolated cases of kidney/liver problems at very high picolinate doses.
InteractionsMay add to blood-sugar-lowering medication — monitor if diabetic.

Bottom line: trivalent chromium is safe but its benefits for blood sugar or weight are small and uncertain, and it may not even be an essential nutrient. A varied diet covers any need; don't rely on it to manage diabetes.

← All supplementsShort dietary version

References

Reference and upper-limit values are general adult figures from official bodies; individual needs vary. Therapeutic doses describe clinical/research use, not prescriptions.

  1. US NIH Office of Dietary Supplements. Chromium — Health Professional Fact Sheet. ods.od.nih.gov
  2. EFSA Panel (NDA). Scientific Opinion on Dietary Reference Values for chromium (no requirement set; essentiality not established). EFSA Journal 2014;12(10):3845. efsa.onlinelibrary.wiley.com

This article summarizes nutrition science from official health authorities and peer-reviewed sources for education. It is not a substitute for individual medical advice, and the doses given are not prescriptions — always consult a professional before therapeutic supplement use, in pregnancy, in kidney disease, or alongside medication.

✓
Bodil Isaksson, Licensed Biomedical Scientist (Sweden)

At Food Health Lab we explain what the science says in plain language, and we cite our sources so you can check for yourself.

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