I was directing myself at Ro since she lives in my neck of the woods.
It is not so much about brands as it is about being organic and the HU (Heat Units) generally the regular consumer level is junk in the 20 to maybe 40K HU. While Stanley does not mention HUs in the book but if you read any of the proponents of the healing properties of cayenne like Dr. Schulz or Dr. Christopher the byword is "the hotter the better". They write that the minumim HU to have theraputic effect on the system should be 90K.
The book only mentions adding 1/10th tsp per drink but most of us experienced MCers will do 1/4tsp of the 90K HU stuff per drink. It's OK if you can't do that much at first. You system adapts real quick and you can work you way up to it.
Cayenne works at stimulating circulation which will keep things moving in your system and promote healing by bringing a higher volume of fresh blood and axygen to the cells. Cayenne also is a great aid in loosening mucous in the digestive tract so I would say that the HU and amount of cayenne ingested while on the MC will play a key role in the efficacy of the system expelling mucous and toxins and healing.