Gross chemical components were analyzed by a commercial laboratory (Eurofins Food & Feed Testing, Lidköping, Sweden). Protein contents were estimated as 6.25 times the nitrogen content determined by Kjeldahl's method (NMKL 6). Moisture content was determined by drying (NMKL 23) and fat content by extraction (NMKL 160 mod). Proximate analyses were performed in duplicate. The results are presented in Supplementary Table . pH measurements were performed in triplicate with a glass-stick probe (InLab Solids, Mettler Toledo Intl. Inc., Greifensee, Switzerland) connected to a Beckman pH meter (model PHI 31, Beckman Instruments Inc., Irvine, CA, USA). pH (Table ) is given as the average of three replicated measurements pr formulation.