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

Inclusion Criteria: * Male or postmenopausal female 55-70 years of age * Women: lack of menses for at least two years. * Subject is willing and able to comply with the study protocols. * Subject is willing to participate in all study procedures * Self-reported stable dose of prescribed medications for a minimum of 6 months * BMI 18.5 - 29.9 kg/m2 Exclusion Criteria: * Self-reported use of daily anticoagulation agents including aspirin, NSAIDs * Prescribed metaformin, statins or medications known to interfere with zinc, protein, or lipid metabolism * Vegan, Vegetarians, food faddists or those consuming a non-traditional diet (e.g. Adkins, Keto, Paleo, etc.) * Fruit consumption ≥ 3 cups/day * Regular consumption of strawberries (2-3 servings/week) * Vegetable consumption ≥ 4 cups/day * Coffee/tea ≥ 3 cups/day * Dark chocolate ≥ 3 oz/day * Alcohol intake greater than 2 drinks in a day for men, or 1 drink in a day for women. * Self-reported restriction of physical activity due to a chronic health condition * Self-reported chronic/routine high intensity exercise * Self-reported diabetes * Blood pressure ≥ 140/90 mm Hg * Self-reported renal or liver disease * Self-reported heart disease, which includes cardiovascular events and stroke * Peripheral artery disease Raynaud's syndrome or disease * Inability to properly place or wear the PAT probes or abnormal measurements on pre-screening PAT * Self-reported cancer within past 5 years * Self-reported malabsorption * Unwillingness to stop any supplement use six weeks prior to study initiation, including multivitamin/mineral, powders, herbal, plant or botanical, pro- and prebiotics, and oil supplements. * Smoking, vaping, cannabis use * Current enrollee in a clinical research study.