Evidence-Based Complementary and Alternative Medicine / 2014 / Article / Fig 2

Research Article

Proof-of-Concept Randomized Controlled Study of Cognition Effects of the Proprietary Extract Sceletium tortuosum (Zembrin) Targeting Phosphodiesterase-4 in Cognitively Healthy Subjects: Implications for Alzheimer’s Dementia

Figure 2

Cognitive effects of Zembrin extract in healthy subjects: Zembrin-treated subjects and placebo-treated subjects were administered CNS Vital SignR battery of neuropsychological tests at baseline and at the end of the treatment period. Cognitive domains were derived from CNS Vital SignR tests.