When a naïve T cell encounters a new threat, it remembers it, becoming a memory T cell. This means we naturally develop a surplus of memory T cells over time.⁴ So to maintain a healthy immune system, we need to support a youthful ratio of naïve to memory T cells, promote healthy naïve T cell production and encourage NK cell activity.

Cistanche rejuvenates the immune system

The cistanche plant contains a compound called echinacoside. It stimulates naïve T cell development, which in turn supports a healthy ratio of naïve-to-memory T cells.^5,6

Cistanche also increases NK cell activity. In pre-clinical research, cistanche supported a 15% life span increase for NK cells.⁵ In a 12-week clinical study, standardized cistanche produced an 11.7% increase in NK cell activity and a 20.2% improvement in the ratio of CD4 to CD8 cells, an indicator of youthful, healthy immune response. ⁷

Reishi mushroom inhibits immune senescence

Pre-clinical research indicates that reishi mushrooms may help inhibit the factors of immune senescence and promote longevity.^8,9 This species is packed with polysaccharides, triterpenes and other compounds that boost the function of hematopoietic stem cells, T cells and immune factors that serve as your body’s defense, thus inhibiting immune senescence. ^8,10

Pu-erh tea extract supports immune balance

Pu-erh tea is made from the same plant as black and green tea. But this kind of tea is a little different: it’s rich in polyphenols and other bioactive molecules that support immune health.

In a pre-clinical study, pu-erh extract produced a 7% increase in NK cells and a 10% increase in naïve T cells. In the same study, pu-erh tea extract promoted healthy bone marrow function, which helps rebuild peripheral immune cell components.¹¹