Light Stability Test:
Compare beer bittered entirely with Hopsteiner Tetra lso-Extract (and packaged in either clear or green glass bottles) against identically packaged beer produced with ISO-acids from traditional hopping sources. Place the bottles in sunlight or next to a fluorescent light for two to six hours. After light exposure, compare the two beers by performing organoleptic tests for skunky/light-struck flavors.

Foam Stability and Cling Test:
Compare beer produced with Hopsteiner Tetra Iso-Extract against traditionally hopped beer by in-house tests for foam stability and lacing/cling. Beers produced with Hopsteiner Tetra lso-Extract often show dramatically improved foam stability and cling. We recommend using a poured beer test for foam stability. This test accurately reflects how the customer observes beer foam.

Analysis Methods:
More complete information concerning recommended dosing and analysis methods are available upon request.