 Technically Metab-L has been based on mailing list software running on servers of the KNF computer club.Being non-commercial and "Open-Source-like", generous, unconditional and long-term financial support by two metabolics-interested companies, Milupa GmbH, Germany, now Nutricia Metabolics, Nutricia GmbH Germany, (ongoing) and Orphan Europe Germany (until October 2013) were essential and helpful almost from the very beginning.Despite its homemade basis, rustic origin and initially one-man approach, metabolic professionals from all over the world quickly joined in the project.