Medical Herbalists use liquid herbal extracts from beneficial plants. The active ingredients are converted from a solid (the plant) to a liquid. They are more concentrated and more absorbable. The substances in the formula pass through the intestines easily and enter the horse’s bloodstream directly. A dried herb will first have to be digested by the correct intestinal bacteria. That takes longer and some of the components can be lost. In addition, the concentration of active ingredients is much higher in extracts. 
Natures Farmacy's Ross River Virus Support tonic contains the following medical grade herbal extracts;
St Mary's Thistle, Cats Claw, Celery, Rosehips, Turmeric, and Willow Bark*
**Please Note - This product may contain substances that some sporting bodies may regard as prohibited or controlled substances. If you require a non-swab version, please notify us in the text box.