I just got a blood test yesterday (11/19/2010) for this problem because I am nearly certain that I have developed an allergy to all SOY products!  I am in my late 50's, and have been using a 'natural' progesteron cream, along with Vit. E oil for my dry skin on my face, and a 'natural' vaginal cream.  What I have discovered by going online is that Vit. E oils are SOY BASED, and Vit. E is in all of the above mentioned products that I have been using.  Also SOY, is in almost all foods ~ you HAVE to read the labels!!!  It's even in most chocolates.  Anyway, I will report back once I have found out my blood test results to see for certain if I am indeed allergic to SOY.  Oh, don't forget that our skin is our largest organ of our body, so whatever we put on it will eventually have an effect with built up toxins that our body doesn't like.