You can't imagine what I felt when I read this great news:
All types of beer (2–4% dilution) were found to counteract these stimulation-induced effects and significant reduction of neopterin formation and tryptophan degradation was observed (p < 0.01). Data demonstrate that beer reduces production of neopterin and degradation of tryptophan, both these biochemical pathways are induced during cell-mediated immune response. Data suggest that the immunosuppressive capacity of beer may relate to its anti-inflammatory nature.Some more detail here but plainer English here.
Update: Another benefit is pointed out here:
This suppression might be connected with the calming effect of beer since its normalising effect on the tryptophan balance improves the availability of the "happiness hormone" serotonin.All hail Prof. Dietmar Fuchs!