What is Vitamin D?
Vitamin D is a fat-soluble vitamin typically synthesized via UV light exposure. Having normal levels is essential for a good immune system and healthy mineral balance.   
Why is Vitamin D included in the Inflammation and Metabolic axes?
Evidence has shown that low concentrations of Vitamin D are associated with increased levels of inflammatory markers , and an increased risk of Metabolic Syndrome . Metabolic syndrome is a cluster of conditions that occur together, increasing your risk of heart disease, stroke, and type 2 diabetes.
How can I better understand my results?
- Deficient: <20 ng/mL
- suboptimal: 20-30 ng/mL
- optimal: 30-50 ng/mL
- upper normal: 50-70 ng/mL
Where can I learn more?
Dr. Andrew Huberman’s interview with Dr. Rhonda Patrick covers relevant topics around Vitamin D
A good commentary on Vitamin D topics from a Harvard physician