If already on cod liver oil, does a D level of 32 concern you enough to intervene with sublingual or micellized form?

Chris Kresser: You’d have to check the PTH to know for sure. I’m not sure where we are in the course right now, but I discuss how to use PTH as a way of determining whether a borderline level of 25(OH)D is indicative of biological D deficiency or not. If PTH is below 30, the patient has optimal suppression of PTH, and that indicates plenty of active vitamin D. But if PTH is above 30, it indicates deficiency and you would supplement. With a PTH at 32, given an autoimmune condition, I would say it’s definitely safe to bring that up to the 40, 45 level. I mentioned I think in the D presentation that autoimmunity is one of the conditions, situations where I like to have a slightly higher level of vitamin D, and in many cases, especially if there’s active disease present, I think it’s worth giving that a shot.