I also have cold feet. DR Becker just said that it could be caused by low  
thyroid. Check your arm pit temperature before getting out of bed in the  
morning. If it is 0.5 to 1 degree lower than 98.6 it could indicate low 
thyroid.  I started 2 days ago using my GB -4000 zapper with the thyroid  
programs. Seems like my feet are not as cold.
Brickey