Freeze Dried vs the Spray Dried Form of Rhodiola Rosea

In testing Swimming Time to Exhaustion in rats, the Freeze-Dried form of Rhodiola rosea root extract produced superior physical strength and endurance performance, compared to the Spray-Dried form of the extract.
Experimental Biology and Medicine, 2005, in press

Seifulla Roshen1
(1) Russian Center for Professional Sport Education and Training, Institute of Immunopathology, Russian Academy of Natural Sciences, Molodogvardeiskaya 46/1, Moscow-121351, Russia
* (1) This work was supported by grants from the Center of Modern Medicine, and Institute of Immunotherapy, Russian Academy of Natural Sciences

Summary

In this study we investigated the effect of freeze-dried (FDE) and spray-dried (SDE) Rhodiola rosea root extracts, standardized to 3% rosavins and 0.8% salidroside, on swimming time to exhaustion, plasma fatty acids and corticosterone, and muscle glycogen concentration in rats. The two experimental groups of animals received 50mg/kg of either FDE or SDE of R. rosea, administered 30 minutes prior to an exhaustive swimming test. The control group received 50mg/kg maltodextrin.

Results revealed quite surprising and dramatic pharmacological differences between the performance enhancing effects of the two types of R. rosea extracts. more…