From here: http://nickgray.net/soylent-frieze/
There’s a link to here: http://www.soylent-x-frieze.com
Under the “PROTOTYPE: 0.01” section it says
Complete Nutrition 90% Algae-Derived Paste
At the bottom of that page is a link to the nutrition facts: http://files.soylent.com/pdf/soylent-nutrition-facts-paste.pdf
“Whole Algal Protein” is listed as the first ingredient. Will 1.6 have algal protien too? That would explain why it’s taking so long for them to release it.