Rehmannia is a Taoist Tonic Herbalist in the Gate of Life lineage, a 5000 year old herbal system from China. In 1998, he met Master herbalist Ron Teeguarden and became his personal apprentice until 2006, when he formed Shamanshack. Rehmannia studied Chinese medical diagnosis at Alhambra University, and obtained a degree from Natural healing College as "Master herbalist", but adheres to the title master Teeguarden gave him as "Superior herbalist." He is a pending member of the American herbalists Guild.
Rehmannia is adept in the 5000 year old healing discipline called the Gate of Life lineage, which utilizes "Tonic" herbs to maintain balanced health. He has written 5 books including Raw Chi, Healing Thresholds and The Hsien, and is near completion of an online course in Taoist health philosophy and Tonic herbalism in the Gate of Life lineage. www.gateoflife.org
He is truly a front-runner in his field, and has taught and influenced many mendicants of Tonic herbalism.