Results: A symbolic Gauss-Jordan elimination routine was developed for analyzing large metabolic networks.

Conclusions: We were able to find symbolic solutions for the steady state flux distribution of large metabolic networks.

The aim of this paper is to develop a routine that symbolically finds the steady state solutions of large metabolic networks.

Besides age, female sex and APOE ε4 genotype represent strong risk factors for AD that also give rise to large metabolic differences.