Pregnenolone and DHEA supplements

Patient: I am 62 year old female. My testosterone level is low as well as my DHEA level. My doctor has requested I take 50mg of DHEA and 100mg of Pregnenolone. Are these safe amounts. I have read several items on the internet that with regard to the Pregnenolone that 1mg per day would be alright but that 100mg is too much. Please advise what you think. Thank you.