What is the benefit of adding glycerin to final product? Is this consider as part of total dissolved solids?
Mouth feel. Especially important for neutral products, like vodka.
Mouth feel, smoothness, sweetness.
Trying to dig up some old references on glycerin. I think it was an old Fleischmann book where he stated that glycerin's positive impact was temporary, and over longer periods of time it would turn bitter. Thought this was interesting, as I'd never heard that previously. Seemed to be a relatively common blending ingredient pre-prohibition, especially in low-tier spirits.