Awesome have you done blood work? And by crash you mean low libido joint pain type symptoms of low e right? Or something worse then that?I have tried every possible mixture, application area and dosage. Best application areas are shoulders, traps, wrist and backhand. You may find androsterone beneficial for the first days as a standalone product but I can guarantee you will crash soon afterwards. Best is to mix Pansterone and Androsterone or Androsterone with Gonadin. I cant handle dosages over 3mg of SFA Androsterone topically, DMSO Androsterone was even almost too strong with just as little as 1mg.
Nowadays I am only using 10 drops of Gonadin and thats my favourite without any negatives which I can take for months.