Below is a good, new presentation by University of Washington researcher Matt Kaeberlein on why rapamycin is widely considered the “gold standard” of longevity drugs. For additional good, but more consumer-oriented videos, on rapamycin see the "best rapamycin videos" list from our FAQ (Frequently Asked Questions and Answers).
A BIG thanks to Matt for this Gold Standard video review…!
What dosage should a female 72 yrs old 5 ft 2 in 139 lbs take?
See this post on dosing: What is the Rapamycin Dosing / Dosage for Anti-Aging or Longevity, and Life Extension?
Most doctors prescribe 6mg for their patients - but you have lower weight than most, so you may want to take less. Other people give older people higher doses to lower mTOR more.