Some had problems increasing their Vit D when they were taking D2. Switching to D3 helped.
I think the low D3 and the Mast Cell problems indicate our Immune Sys is out of balance. The Mast Cell mediators can be very inflammatory. The question is why the imbalance?? Hopefully, I will find that answer one of these days. 🙂
I agree that our immune systems are low. Did you know, though, that people with mast cell disorders have abnormal mast cells? They don’t know when to stop growing (not unlike cancer), and their shape isn’t quite right. Apparently, some have abnormal KIT receptors, too. So it may be more than an imbalance issue. The mediators are VERY inflammatory. It DOES make me wonder if that is why we need so much Vitamin D3… Thanks for your thoughts. 🙂