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.