Established in 2005, Health4All is a family-owned nutritional supplements brand based in Lancashire. We make our vitamins and supplements to exacting standards. And because we believe in health for all, we offer our products at an affordable price to be available for everyone. Suitable for vegetarians and vegans. Manufactured & packed in the UK to GMP standards. Letterbox friendly packaging. Slippery Elm works synergistically with Marshmallow Root, both can be combined for improved benefits. Look for Marshmallow Root in our store. This bark contains a starchy carbohydrate substance called mucilage. When it's mixed with water it swells and forms a slippery gel. Ulmus rubra, or slippery elm, is a tree from North America. The inner bark of the tree is harvested and used as a herb.