03.24.16
ConsumerLab.com, White Plains, NY, recently reviewed clinical evidence and purchased nine rhodiola (R. rosea) supplements in the U.S., and tested their quality—checking levels of rosavins and salidroside—key marker compounds which may also play a role in R. rosea’s activity. Products made from herb powders were additionally tested to be sure they did not exceed contamination limits for lead, cadmium, and arsenic.
ConsumerLab.com's tests revealed that one product contained just one-tenth of the amount of rosavin compounds expected and another contained only half. Among the products which passed testing (including four products tested through CL's voluntary Quality Certification Program), ConsumerLab identified two as its "Top Picks," as they contained the expected amounts of R. rosea compounds in doses most closely resembling what has been shown to be effective in clinical studies and at lowest cost to the consumer.
The test results and product ratings are now available in ConsumerLab.com's Rhodiola Rosea Supplements Review. The report summarizes the clinical evidence regarding the use of R. rosea, dosage, what to look for on labels, safety and potential drug interactions.
ConsumerLab.com's tests revealed that one product contained just one-tenth of the amount of rosavin compounds expected and another contained only half. Among the products which passed testing (including four products tested through CL's voluntary Quality Certification Program), ConsumerLab identified two as its "Top Picks," as they contained the expected amounts of R. rosea compounds in doses most closely resembling what has been shown to be effective in clinical studies and at lowest cost to the consumer.
The test results and product ratings are now available in ConsumerLab.com's Rhodiola Rosea Supplements Review. The report summarizes the clinical evidence regarding the use of R. rosea, dosage, what to look for on labels, safety and potential drug interactions.