: What is the Transfer Factor? I've never heard of this.

Company that sells Transfer Factor claims it is an immune system booster. Transfer factors are extracted from cow colostrum (mother's milk)and help the body build up its immune system to better fight diseases, including autoimmune diseases. Additional information is on the web. There are other products available that claim to boost the immune system.

My mother's polymyalgia has improved. I think hers was caused by low thyroid.