Arterosil® HP

Arterosil HP is a practitioner-formulated supplement designed for adults seeking foundational support for vascular health. It is produced by Calroy Health Sciences and distributed through Designs for Health, both of which focus on clinical-grade formulations. The product is built around a single, well-characterized mechanism: maintaining the integrity of the endothelial glycocalyx, the microscopic protective gel layer that coats the inner wall of every artery, vein, and capillary in the body.

The primary active ingredient is MonitumRS®, a proprietary extract of rhamnan sulfate — a sulfated polysaccharide isolated from the green seaweed Monostroma nitidum. Rhamnan sulfate belongs to a class of compounds known as glycocalyx-regenerating compounds (GRCs). Structurally, it functions as a heparan sulfate mimetic, meaning it closely resembles the glycosaminoglycan chains that form the healthy glycocalyx mesh. This structural similarity allows it to help replenish components of the glycocalyx that are shed through inflammation, oxidative stress, and normal aging. The extract is backed by over 50 published references on PubMed and has been tested in independent laboratory and clinical settings.

The endothelial glycocalyx plays a central role in regulating vascular function. When intact, it helps govern how the vessel wall interacts with circulating blood cells, inflammatory signals, and lipid particles. Degradation of this layer is associated with impaired circulation, reduced endothelial barrier function, and compromised arterial wall health. By supplying the structural building blocks needed to support glycocalyx maintenance, Arterosil HP addresses vascular health at a foundational level that most cardiovascular supplements do not reach.

Complementing MonitumRS® is a blend of 22 fruits, vegetables, and green tea extracts — including grape seed and skin, bilberry, broccoli, tomato, and garlic — selected for their polyphenol and antioxidant content. These compounds help reduce oxidative stress, which is one of the primary drivers of glycocalyx breakdown. Together, the two components create a formulation suited for adults managing cardiovascular risk factors, those with a family history of vascular disease, or individuals using the product as part of a broader integrative cardiology protocol.