Chromium

铬

Place · Level 3

和胰岛素信号相关的微量元素 · 证据比补剂广告克制得多

Connected to · 2

synergy · 1

Niacin
Historical 'glucose tolerance factor' (GTF) paired Cr with niacin in 70s-80s marketing. EFSA 2014 + purified LMWCr studies revoked Cr's essential-nutrient status. Kept as a historical edge for context — not a clinical recommendation.

contrast · 1

PCOS
Chromium is sold as a must-have for blood sugar on the strength of glucose tolerance factor, a concept that has since been overturned. For insulin resistance in PCOS it does not belong in the evidence-backed column.

Trace amount

Stop 1/5

需要量极小

Chromium is a trace element — the body needs very little. The US IOM AI is 25-35 µg/day, but that number itself is under attack: EFSA 2014 retracted chromium's RDA, on the grounds that "there is insufficient evidence to establish a required intake".

Two oxidation states, with vastly different safety:

Form	Sources	Safety
Cr(III) trivalent chromium	Food + supplements	Absorption < 2.5%, does not accumulate, essentially non-toxic
Cr(VI) hexavalent chromium	Plating, leather tanning, paints, welding fumes, contaminated drinking water	IARC class 1 carcinogen — lung cancer, nasal cancer, skin corrosion

The classic Cr(VI) public-health incident is the Erin Brockovich case: in the 1990s, US utility PG&E contaminated groundwater in Hinkley, California — later adapted into the film.

Practical:

The Cr(III) in food is nothing to worry about — you are almost incapable of being chromium-deficient, and almost incapable of being chromium-toxicThe real chromium risk is occupational exposure and drinking water quality, not supplement doseChromium is often packaged into "glucose control" supplement stories — the next three scenes go through whether the evidence holds up

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Educational content, not medical advice — consult a clinician.

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