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

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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本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.

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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

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

Read story

本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.