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Effects of Daily Beef Intake, as a Component of a Heart-Healthy Diet on Cellular Zinc

Inflammation Clinical Trial

Official title:
Effects of Daily Beef Intake, as a Component of a Heart-Healthy Diet, on Cellular Zinc Status and Vascular Function in Older Adults

Clinical Trial Summary

The objective of the current study is to test the overarching hypothesis that the beef nutritive matrix is uniquely suited to direct dietary zinc to cellular compartments for improved metabolic function, leading to a greater effect on health outcomes. Specifically, whether beef, as a component of a healthy meal, will promote the absorption of zinc into cells, where the zinc will have greater effects on zinc-dependent metabolic processes supporting cardiovascular health. To maximize the observability of these beef-related effects, individuals who are 55- to 70-year-old who generally have a higher risk of zinc deficiency and cardiovascular disease will be enrolled.

Clinical Trial Description

This study will examine whether daily beef intake will promote the absorption of dietary zinc into cells, leading to improved cellular zinc status and microvascular function. The study design will be a crossover comparison of a mixed diet including green leafy vegetables, fruits, whole grains, seeds, and nuts; with beef versus non-meat sources of additional protein and zinc, over two 4-week metabolic study periods. Outcomes will include cellular zinc status determined by erythrocyte zinc tracer exchange (primary), and microvascular function expressed as reactive hyperemia index (RHI). Previous studies have demonstrated that zinc tracer exchange with red blood cells (RBC) is highly sensitive to changes in zinc nutriture. Thus, cellular zinc status will be determined using a novel and cost-effective adaptation of this approach, modeling zinc tracer exchange with freshly-sampled RBC. As intracellular zinc can regulate vascular tone, microvascular function will be measured, using digital peripheral tonometry, will be used as a functional index of both cellular zinc status and vascular health. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT05236374
Study type Interventional
Source University of California, Davis
Contact Roberta R Holt, PhD
Phone 15304005952
Email rrholt@ucdavis.edu
Status Recruiting
Phase N/A
Start date October 1, 2022
Completion date September 4, 2025
View Details
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