Rhodiala Rosea is a herbal plant that grows in the cold regions of the world, and has been widely known as an adaptogen. Numerous studies have demonstrated that Rhodiola rosea enhances cognitive and physical performance.
Physical and Cognitive Performance Proven
Recently a 12-wk German study evaluated the efficacy and safety of a commercially available Rhodiola rosea extract (200mg) that also contains supportive nutrients including vitamins E, B6, B12, folate, and magnesium.
120 adults with physical and cognitive deficiencies participated in this study. Two different dosage regimens were used. One group of 60 (group 1) took 2 capsules orally in the morning after breakfast, and the other group (group 2) took 1 capsule after breakfast and 1 after lunch. Three medical examinations were performed during the course of the study (at baseline, after 6 wk, and after 12 wk). The evaluated symptoms were divided into physical disturbances such as exhaustion, decreased motivation, daytime sleepiness, decreased libido, sleep disturbances, and cognitive complaints (eg, concentration deficiencies, forgetfulness, decreased memory, susceptibility to stress, irritability).
A statistically highly significant improvement in physical and cognitive deficiencies was observed at the end of the study in both groups, as well as in the separately evaluated groups 1 and 2. Improvements in group 1 were more pronounced than in group 2. Improvements in physical performance were observed for 86% of participants in the combined overall group, 92% in group 1, and 79 % in group 2. Improved cognitive performance was demonstrated in 77% of participants in the overall group, 90% in group 1, and in 64% in group 2.
Although the exact mode of action of Rhodiola rosea extract remains unknown, the results of this study are very promising. The positive effect of Rhodiola rosea is supported by the other ingredients: vitamins E, B6, B12, magnesium, and folate. The study author further suggests that such nutritional regime can be recommended as a supportive treatment option for adults with physical and cognitive deficiencies; however, placebo-controlled clinical trials are still needed to confirm these promising findings.
Source: Advances In Natural Therapy, 2007, Vol 24 (4): 929-39