I'm deficient in vitamin D but analyze: is it affecting weight loss? Map vitamin D status and effects on hormones, mood, energy. Calculate: if deficiency impairs fat loss hormones and reduces activity, what's needed? Show me the vitamin D protocol: test, supplement this amount, retest. Give me the optimization: get levels to this range. Include: whether vitamin D deficiency is affecting me, how much to supplement, and if correcting it helps weight loss.