The legacy of Essiac continued with Rene Caisse’s confidants Sheila Snow and Mary MacPherson and then with Mali Klein who, over 20 years, independently evaluated the documents and evidence she holds as the custodian of the Sheila Snow Fraser Essiac Archive. Mali Klein also brought the indigenous formula to Europe and formed the UK charity Clouds Trust in 1997.
The Rumex Classic formula uses four herbs: Sheep Sorrel tops and root, Burdock root, Turkey Rhubarb root and Slippery Elm bark. It is easily brewed at home into a tea which may be drunk once or twice a day.
According to Rene Caisse, the tea had to include Sheep Sorrel root:
“You can buy the crushed leaves but they are no good alone. […] I do know that the whole plant is needed”.
– Sheila Snow with Mali Klein October 1996