Arabinogalactan Powder by Foodscience Of Vermont.A larch tree supplement to support Defense mechanism of body function and microflora balance in the GI tract. Arabinogalactans from Larch Tree are water-soluble polysaccharides and fiber that supports proper Defense mechanism of body function. They also promote the growth of probiotic bacteria such as Lactobacilli and Bifidobacteria in the intestines, which are important for GI Tract health. The Larch Tree Extract powder in this product is ImmuneEnhancer.