Functional medicine in McKinney starts with a simple idea: symptoms are clues, not the target. Your body’s systems are connected. A gut problem can show up as skin trouble, poor sleep can push blood sugar off course, and a toxin load can stall hormone work. So Dr. Cas tests first, then builds the plan.
Functional lab testing
A 100+ biomarker panel covering metabolic, hormonal, inflammatory, nutrient and cardiovascular markers, repeated through the year so progress is measured. Functional lab testing →
Gut health and food sensitivity testing
Dr. Cas estimates that 80 percent of what he addresses involves the gut. Stool testing maps your microbiome and inflammation; food sensitivity testing shows what your immune system reacts to. Gut health testing →
Mold, heavy metal and toxin testing
One urine panel checks heavy metals, mold toxins and environmental chemicals that standard bloodwork never measures. Toxin testing →
Micronutrient testing
Measures the vitamins and minerals inside your cells, and how well your body actually uses them. Micronutrient testing →
Genetic and MTHFR testing
Variants in genes like MTHFR can slow methylation, the process behind energy, mood, detox and hormone balance. Included in every membership. Genetic testing →
Mitochondrial and oxidative stress testing
Measures the strain on your cells’ energy systems directly, so treatment targets the cause of low energy instead of guessing. Oxidative stress testing →
Autism support program
A physician-directed, 90-day program for children and adolescents, built on genetic and toxin testing. It does not replace behavioral, speech or occupational therapy. Autism support program →
The order matters
Foundations come first: methylation, nutrients, hormones and daily habits. Deeper work follows when your data says your body is ready. See how that plays out over a year in the Optimal Patient Journey.