For those who dont understand fatty acid metabolism.
AA is the n-6 equivilant of EPA.
AA is genearlly classified as pro-inflammatory vs EPA being anti-inflamatory (not exactly true but easier to say that way)
Supplementing with AA is a good way to increase inflammation in the body, increasing your risk of a variety of diseases including heart disease.
There is evidence that AA linked prostaglandins are associated with protein synthesis, but there is no evidence that increasing AA increases protein synthesis. Nor the fact that fish oil suppementation decreases protein synthesis (which it definately could do)
AA is a shitty supplement