PGG-glucan

"poly-[1-6]--D-glucopyranosyl-[1-3]--D-glucopyranose glucan (PGG glucan)"

Proprietary name Betafectin

What is it
"Betafectin® PGG-Glucan, a novel β-(1,6) branched β-(1,3) glucan purified from the cell walls of Saccharomyces cerevisiae"

A form or type of beta-glucan

a macrophage-specific immunomodulator