I had a PET scan on the 21st of Oct. Praise the Lord the results were great. The person who administered the radio active stuff told me to drink a gallon of African Rooibos Red Tea as soon as I got home. I did. He says it helps to wash the radiation out. I thought I would share this. I drank a gallon in less than an hour and half so you can imagine where I spent most of my time:) The tea is made by Twinings of London. I found it at our Publix in Tampabay area Florida. Worth a try!!! I didn't need any sweetener. It was good.