Da store doser phenylacetat (190 - 474 mg/ kg) blev givet subkutant til rotteunger, blev der observeret nedsat proliferation og øget tab af neuroner samt reduktion af indholdet af myelin i CNS.
When high doses of phenylacetate (190 - 474 mg/ kg) were given subcutaneously to rat pups, decreased proliferation and increased loss of neurons were observed, as well as a reduction in CNS myelin.