Guide
What is chromium? A plain guide
Chromium is an essential trace mineral with an Adequate Intake, not an RDA, set by the Food and Nutrition Board in 2001 — and a chemically different substance from the industrial metal that shares its name.
Chromium is an essential trace mineral — the body needs a small, steady amount from food, and supplements supply it in several different chemical forms, most often chromium picolinate. It isn't the same substance as the shiny industrial metal used in stainless steel or chrome plating; that's a different, toxic form the body was never built to use. This guide covers what it is, how much is set as adequate, and what forms show up on labels.
Two very different things share the name "chromium"
The metal in car trim, tools and stainless steel is mostly hexavalent chromium (Cr6+), the form regulators worry about in drinking water and industrial exposure — the U.S. Environmental Protection Agency and the International Agency for Research on Cancer classify hexavalent chromium compounds as carcinogenic by inhalation. The chromium in food and supplements is trivalent chromium (Cr3+), a chemically different, much less reactive form that the body absorbs and uses in tiny amounts. The two aren't interchangeable, and a dietary supplement contains the trivalent form, not the metal or the industrial compound.
How much the body needs
Chromium doesn't have a Recommended Dietary Allowance (RDA) — the Food and Nutrition Board, part of the Institute of Medicine, concluded in its 2001 dietary reference intake report that there wasn't enough evidence to set one, so it set an Adequate Intake (AI) instead — the amount assumed to cover need, based on what healthy people typically consume.
| Group | AI |
|---|---|
| Men, 19-50 | 35 mcg/day |
| Men, 51+ | 30 mcg/day |
| Women, 19-50 | 25 mcg/day |
| Women, 51+ | 20 mcg/day |
Pregnancy and lactation have their own, different Adequate Intake figures; this page doesn't cover them — ask a doctor for a number specific to your situation rather than using the general adult figures above.
The FDA's Daily Value (%DV) for chromium on Supplement Facts labels is 35 mcg, effective under the 2016 label rule (with a 2020-2021 compliance deadline by manufacturer size). Before that, the DV was 120 mcg — so a label or a source written before the change can quote a %DV nearly 3.5 times higher for the same 35 mcg amount. That's a labeling-date issue, not a change in how much chromium a person needs.
Food sources include broccoli, grape juice, whole grains, potatoes and some meats, per USDA FoodData Central, though chromium content varies with soil and processing and isn't consistently listed on food labels the way other nutrients are.
Forms used in supplements
Chromium shows up on labels as a few different compounds:
- Chromium picolinate — chromium bound to picolinic acid. The most commonly sold form, and the one used in most of the diabetes research described in chromium benefits: what the research does and doesn't show.
- Chromium chloride — a simpler inorganic salt, generally regarded as less well absorbed than picolinate.
- Chromium polynicotinate (nicotinate) — chromium bound to niacin-related compounds, marketed as "niacin-bound chromium."
- "GTF chromium" / chromium-rich yeast — a food-derived source, historically associated with the idea of a "glucose tolerance factor," a hypothesis that hasn't held up as a distinct compound.
Labels list the elemental chromium amount in micrograms (mcg or µg) — for example, "chromium (as chromium picolinate) 200 mcg" means 200 mcg is chromium itself, not the weight of the whole picolinate compound.
What research has and hasn't shown
Chromium's textbook role is as a trace mineral involved in how the body processes carbohydrate and fat. The mechanism behind that role is not well pinned down: in a 2006 evidence-based review, the FDA's own nutrition division concluded that the relationship between chromium picolinate intake and insulin resistance is "highly uncertain," even while allowing a narrow qualified health claim on the topic. What the actual glucose trials found — and where they found nothing — is covered on its own page rather than repeated here: see chromium benefits and blood sugar supplements: what the evidence supports.
Questions people ask
What does chromium do for the body?
It's classed as an essential trace mineral involved in normal carbohydrate and fat metabolism, though the FDA itself has called the underlying mechanism highly uncertain. See chromium benefits for what trials have actually measured.
Is chromium a metal?
Elemental chromium is a metal, yes — but the form in food and supplements (trivalent chromium) is chemically distinct from the metal used in plating and steel, and from hexavalent chromium, the industrial form regulators classify as a carcinogen by inhalation.
What is chromium picolinate?
It's chromium bound to picolinic acid — the most common form sold as a supplement, and the form used in most human trials on chromium and blood sugar.
Is chromium the same as "chromium 6"?
No. "Chromium 6" (hexavalent chromium) is the industrial and environmental-contaminant form. Dietary supplements contain trivalent chromium, a different and far less reactive form.
What is chromium vitamin, exactly?
It's not a vitamin — it's a mineral, specifically an essential trace mineral, meaning the body needs only a very small amount and can't make it, so it has to come from food or a supplement.
Sources
- Chromium picolinate intake and risk of type 2 diabetes: an evidence-based review by the United States Food and Drug Administration The FDA's own review of the evidence called the link between chromium picolinate and insulin resistance highly uncertain, even while allowing a narrow qualified claim.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.