As well as Magnolia Bark that I reviewed in my last post, I also found Jujube Fruit listed as an adaptogen. The short version of its benefit is nicely summed up by:
“Recent phytochemical studies of jujube fruits have shed some light on their biological effects, such as the anticancer, anti-inflammatory, antiobesity, immunostimulating, antioxidant, hepatoprotective, and gastrointestinal protective activities and inhibition of foam cell formation in macrophages. ” The jujube (Ziziphus jujuba Mill.) fruit: a review of current knowledge of fruit composition and health benefits.
- Hydroalcoholic extract of Zizyphus jujuba ameliorates seizures, oxidative stress, and cognitive impairment in experimental models of epilepsy in rats.
- Possible attenuation of nitric oxide expression in anti-inflammatory effect of Ziziphus jujuba in rat. 
In terms of “folk knowledge”, it is ascribed to “offer excellent support for the adrenal glands” in Islamic literature.
This supplement appears to another good candidate supplement for CFS, especially because it is know to have gastrointestinal impact.