Beneficial effects of EVA are reputed to be, among others, enhanced sense of well being, improved health, increased energy, improved movement, enhanced resistance to disease, increased blood flow, promotion of rapid healing in tissues and bones, relief of symptoms in arthritis and gout, and pain reduction associated with disease or injury to muscles and joints.  Active ingredients have been found to include a variety of minerals, proteins, collagens, fatty acids, and glycosaminoglycans (GAG) in varying concentrations.  

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Although the effect of EVA in rheumatoid arthritis has not been explored as such, investigations by University of Alberta researchers and relevant work on the role of GAG, omega3 fatty acids and prostaglandins offer a possible explanation for the anecdotal effects that have been reported.  Active GAG has been extracted from EVA, and researchers at the University of Alberta have demonstrated that this extracted GAG has growth promoting effects on cells and anti-inflammatory properties.  Omega3 fatty acids and prostaglandins are also reputed to have anti-inflammatory effects.  Thus, there is evidence to suggest that EVA contains active ingredients that may have therapeutic effects in rheumatoid arthritis.