Blood and Muscle Response to Cheddar Cheese in Healthy Adults

Each subject will take part in two metabolic studies. Each metabolic study was designed to test the acute blood and muscle response to an ingested amount of either cheddar cheese or milk. Approximately, one month after the first experiment (Metabolic Study #1), the participant will complete the second experiment (Metabolic Study #2) which was exact in design and at the same time of day as the first study but the participant ingested the alternate food product. The morning of the metabolic studies, the participant will arrive at the clinical research center after a 10h fast. A catheter will be placed in the participants' arm for blood sampling. Next, the participant will undergo a fasted thigh skeletal muscle biopsy. Following the muscle biopsy, the participant will consume either cheddar cheese (65g) or milk (370 mL) each amounting to 20g of protein. Subsequent muscle biopsies will occur at 60 and 180min after product ingestion. Blood sampling will occur in the fasted state and periodically after ingestion of the products (up to 300min).

Inclusion criteria

• Age between 18-35y

Exclusion criteria

• History of cardiovascular disease
• History of endocrine or metabolic disease (e.g., hypo/hyperthyroidism, diabetes)
• History of kidney disease or failure
• History of liver disease
• History of respiratory disease (acute upper respiratory infection, chronic lung disease)
• History of stroke with motor disability
• Use of anticoagulant therapy (e.g., Coumadin, heparin) including aspirin and fish oils within 7d of the first biopsy experiment
• Elevated systolic blood pressure >150 or a diastolic blood pressure > 100
• Smoking
• Recent anabolic or corticosteroids use (within 12 weeks)
• Pregnancy as determined by a pregnancy test
• self report of lactose intolerance
• Any other medical condition or event considered exclusionary by the PI and faculty physician