# Plasma Zinc **Plasma zinc** is crucial for human health, particularly for testosterone production, immunity, and cancer defence mechanisms. Zinc cannot be well-stored in the body, so regular dietary intake of zinc is important in preventing deficiency. Zinc deficiency can lead to reduced testosterone levels, affecting sexual development, fertility, and overall health. Zinc plays a vital role in the synthesis of testosterone, and its status is closely linked to serum testosterone levels. Studies have shown that zinc deficiency is associated with hypogonadism in men, and even marginal zinc deficiency can significantly decrease serum testosterone concentrations. Zinc supplementation has been shown to increase serum testosterone levels in individuals with zinc deficiency, highlighting its importance in modulating testosterone levels in normal men. An adequate level of zinc is essential for immune function and modulation of cancer risk due to its role as an antioxidant. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.beoptimal.ca/biomarker-panels/male-performance-panel/plasma-zinc.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.