I have had two episodes of Deep vein thrombosis. Both Brought on by estrogen as in birth control pills and pregnancy.I find that if I keep my weight down and walk often, and I take vit.E 400 IU. a day. Also, I take the herb Butchers Broom that helps with inflammation.If you are on Heprin or Coumadin (I hated that stuff,it makes big red spots on your skin) ask your Dr. Vit.E can thin the blood. Also,Buckwheat is said to be a vein strengthener,I have yet to try it, but I will.With my last child, I had to take Heprin shots every 8 hours, by the time he was born, I was black and blue everywhere. Did you know that Heprin is made from the intestinal mucus of pigs? I Love pigs, and dont eat pork! Well good luck, there are alot of herbs for our condition,you just have to do your homework. Kathleen P.S. Dont Smoke!