As such, chromium - a trace mineral like iron and zinc - is not part of basic? Trace mineral premixes used in pig and poultry feeds worldwide.

就其本身而言，铬作为一种像铁和锌的微量元素，但在全世界的猪、禽预混料中并不是一种基础微量矿物质。

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Both dietary supplements contain 105 micrograms of the trace mineral selenium per daily dose, or about twice the Recommended Daily Allowance, which is 55 micrograms a day for adults, according to the center.

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"I suppose if you lay in a bath filled with mineral salts and trace elements some small part of that will be absorbed through your skin, " he says.

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