Quote Originally Posted by rphlslv View Post
Everytime I do a mini megadose of it (only around 20,000 IU) I get a stupid ass cold sore. Three consecutive times already.

Also, during the megadoses, I was also bit sick (which is why I took the vit D), but not enough to trigger a cold sore. Like this time it was just mild allergies.

It can't be just coincidence.

Anyone else have this problem?
You shouldn't take isolated vitamins. I had problems taking vitamin D3 until I took butter oil and fermented cod liver oil from green pasture. Like Weston Price recommended. This is actually more a food than a supplement, it has all the natural vitamins in natural ratios.