Cistanche for Immune Function

Research suggests that Cistanche and its active compounds, particularly phenylethanoid glycosides and polysaccharides, may support immune function across several experimental contexts, including aging, hormonal disruption, and chemically induced immunosuppression. Studies indicate improvements in immune organ health, T cell populations, natural killer cell activity, cytokine balance, and gut microbiome composition in treated animals compared to controls, with some evidence suggesting that traditionally processed forms of the herb may produce stronger effects than unprocessed preparations. All available evidence comes from animal studies, predominantly in rats and mice, with no human clinical trials represented in this body of research, which substantially limits conclusions about whether these findings would translate to people. One study from 1988 could not be fully evaluated due to unavailable abstract details, and several studies involved multi-ingredient formulas or combined interventions, making it difficult to isolate the specific contribution of Cistanche alone.