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Sequential changes in WOMAC total scores expressed as a percentage of baseline values. Placebo (blue, n = 22), high dose sierrasil (green, n = 20), low dose sierrasil (red, n = 21) and low dose sierrasil + cat's claw extract (orange, n = 25) displayed a time dependent improvement in total WOMAC Scores. There was a trend for a faster onset of action in all sierrasil treated groups when compared to placebo responses.
