Sugar
Appearance
Maltotriose
Maltotriose is fermented last. This is a tricky sugar for the yeast to digest, and some yeast ferment maltotriose better than others. Some strains of brewers yeast do not ferment maltotriose at all! The more flocculent a yeast strain, the less maltotriose they tend to ferment. The ability to ferment maltotriose gives each strain its characteristic attenuation range.