Low dietary zinc alters indices of copper function and status in postmenopausal women12 1The US Department of Agriculture, Agricultural Research Service, Northern Plains Area, is an equal opportunity/affirmative action employer, and all agency services are available without discrimination. 2Mention of a trademark or propriety product does not constitute a guarantee or warranty by the US Department of Agriculture and does not imply its approval to the exclusion of other products that also might be suitable.