Minnie, You gave me a link awhile back in one of your post as I was asking about the effects of low prolactin. I don't know if you remember me saying how amazed I was that prolactin affected the immune system. I never thought to research this particular hormone as I thought it's only function was lactation! So I really am appreciating the new information I'm finding out but could use more if anyone finds any. I'm not that great at researching but I try. I had in the past, dismissed the importance of my prolactin levels going down with each test I've had which has been about 5-6 tests. My last prolactin level was down to 0.9 (nl 2-20). It started two years ago at 4.6 with the same normal range. I only thought it was significant that it was going progressively down and it meant my pituitary was becoming more dysfunctional. But I think it's interesting that in the two years it's been decreasing my hyperthyroidism had gotten more pronounced. I don't know if that's significant because I don't have the autoimmune type. Yet that is. I'm told that it's possible I could end up with Grave's eventually without treatment I'm assuming. If anyone has any information that addresses effects of a below normal prolactin on the immune system I'd appreciate a link or address to the info. All I could find was prolactin had a role in the maintenance of the immune system by way of the immune cells. Also, high prolactin levels were found in 20-30% of Lupus patients and their levels were mild to moderately high. I read there is more and more research on the relationship between prolactin and the immunce system going on especially in regards to autoimmune diseases especially Lupus. What really surprised me was that prolactin is secreted from other tissues and from my understanding it sounded like they meant other tissue as immune cells. Some of the research synopsis were pretty technical and hard to understand. The only thing I could find on lower prolactin levels,which is the info I'm looking for was in studies it caused viruses to be more attenuated or weaker, so the bodies own defense mechanisms were better able to fight the virus. I couldn't tell if they were talking about just a normal prolactin level or a lower than normal level. It was confusing. So my theory that my below normal prolactin level had something to do with my continual infections didn't seem to pan out unless it's because at this point most of my infections are bacterial. I think when I first started getting them they were more viral based. So from what I've found so far I'm assuming that something that affects the maintenance of the immunce system is below normal like my prolactin level is it could have a detrimental affect on the immune system. Just a theory. If anyone finds anything more about prolactin and the immune system let me know. Thanks, Lisa | 