Start slow (perhaps 1-3 Tbsp the first day to see if there is a detox reaction) and build up to a quart.
With the amount your friend will be taking a CS generator would be an economical choice. With a CS generator the price of CS drops to $1/gallon vs $30/8oz for ASAP. Will it work as well? Yes if you buy a good generator like a Silverpuppy.com or Silvergen.com your quality will be up to par with the top CS brands. These generators will make a quart
at a time. I believe that the owner of Silvergen gave some CS to someone with cancer and they did heal. You can call Trem with Silvergen.com or email him about it. It has been reported that cancer cells will dedifferentiate (turn back to normal cells) when they come in contact with CS.