Vitamin D (D2 and D3 Split)

What it measures 

Measures both forms of Vitamin D separately (D2 and D3). D3 is significantly more effective than D2, and many people supplement the wrong form or lack the co-factors — Vitamin K2 and Magnesium — needed for proper absorption. 

Best for 

Anyone actively supplementing Vitamin D, or those with a borderline total Vitamin D result from their Core Test who want to understand why levels are not improving. 

If results need attention 

Your Protocol doctor will advise on the right form, dose, and co-factors for your situation, and help you build a supplementation protocol that actually moves the needle.