I am confused by the information on your site regarding dosage for progesterone cream. On your "progesterone therapy" page you mention how tests on the blood to determine progesterone levels are of little value. You say salvia tests are more reliable. You also mention how tests of plasma 'would show up little or no progesterone." But on the " how to use progesterone cream' page you cite a 2005 study that showed that a 20-40mg dosage "only low plasma progesterone levels were found."
These results were from obtained from blood serum, not salvia. But you quote this study result as the reason why the usual recomended dosage of 20-40mg is not useful and therefore dosage should be much higher. Your site is the only site where I have seen such high dosages (up to 400mg daily) suggested. I'm left to believe that the reason why you are suggesting such high dosages is because you are selling the product Natpro, and the higher the dosage of the cream, the higher the sales for your site. I feel you're biased as far as your information is concerned and that using that study is misleading and contradictory and confusing.