Dichen is the biggest and onlyGMP manufacturer which produce Cistanhc etubulosa extract 40%-90% 4:1 10:1 we got OCIA GAP ISO Dichen Brand-Cistanche tubulosa Extract Total phenylethanoid glycosides40%~98% Acteoside4%~10% Echinacoside10%~25%1,Dichen is theBiggest GMP manufacturer produces Cistanche tubulosa extract. 2,Phenylethanoid glycosides:40%-80% Dichen Cistanche tubulosa extract 1Quality ...