What Is Rhamnan Sulfate?
Rhamnan sulfate is a specialized and highly sulfated polysaccharide from the rare green seaweed Monostroma nitidum. It is studied for its role in supporting vascular health, and the endothelial glycocalyx (EGX), the delicate, micro-thin lining that coats the inside of every blood vessel. Calroy’s proprietary extract of rhamnan sulfate, MonitumRS®, is the key ingredient in Arterosil HP®.
Key takeaways
- Rhamnan sulfate is a highly sulfated polysaccharide from the rare green seaweed Monostroma nitidum.
- It supports vascular health, including the endothelial glycocalyx (EGX), the inner lining of every blood vessel.*
- MonitumRS is Calroy’s patented, standardized extract of rhamnan sulfate — found in Arterosil HP.
- MonitumRS is scientifically shown to protect and restore the endothelial glycocalyx.*†
What are the benefits of rhamnan sulfate?
Rhamnan sulfate is studied for the way it supports the endothelial glycocalyx and healthy vascular function. As delivered in MonitumRS, it:
- Supports a healthy heart*
- Supports vascular integrity and healthy circulation, helping blood move where it’s needed*
- Helps maintain healthy arteries, supporting cardiovascular resilience over time*
- Strengthens the endothelial glycocalyx, the body’s vascular foundation, critical for energy, endurance, and healthy aging*
Where does rhamnan sulfate come from?
Rhamnan sulfate is a complex, specialized sulfated polysaccharide derived from the rare green seaweed Monostroma nitidum. Because this seaweed is uncommon and the compound is complex, how it is sourced, extracted, and standardized matters. This is what sets a patented extract like MonitumRS apart.
The supply of rhamnan sulfate used in Arterosil HP comes from where it naturally grows: a protected outcropping in the Pacific Ocean. For use in Arterosil HP, it is hand harvested by local fishermen and women using traditional methods passed down through generations. This is not mechanized aquaculture, it is hand-harvesting, which means human hands, in the water, doing careful work season by season.
Harvesting the Monostroma nitidum this way ensures the highest quality ingredients end up in the bottle, and creates better conditions for both the environment and the local community.
What does the science show on rhamnan sulfate?
Research on rhamnan sulfate centers on its support for the endothelial glycocalyx and overall vascular health. Arterosil HP contains MonitumRS, a proprietary extract of rhamnan sulfate from Monostroma nitidum.
MonitumRS is scientifically shown to protect and restore the endothelial glycocalyx.*†
In an independent, third-party laboratory in-vitro study, MonitumRS was scientifically shown to protect and restore glucose-damaged endothelial glycocalyx cells to 103.8% of baseline in just 24 hours.*†
Explore more research here.
How is MonitumRS® different from other rhamnan sulfate products?
Not all rhamnan sulfate is the same. Arterosil HP contains MonitumRS, a patented, full-spectrum, standardized extract of rhamnan sulfate from Monostroma nitidum. That standardization is what supports consistent, full-spectrum activity from batch to batch.
The most critical pre-production test involves MonitumRS. Because MonitumRS is a proprietary ingredient developed by Calroy, no industry-wide standard for rhamnan sulfate content existed when MonitumRS was originally created. Calroy established its own internal standard based on research findings, and every batch of MonitumRS must meet that standard before it is accepted for use. Independent testing confirms the rhamnan sulfate content of each batch against that specification.
How to take rhamnan sulfate (Arterosil HP with MonitumRS)
Standardized, scientifically researched rhamnan sulfate is available as MonitumRS in Arterosil HP, in just one capsule twice daily.
Benefits of Arterosil HP include:
- Supports a healthy heart*
- Supports vascular integrity and healthy circulation, helping blood move where it’s needed*
- Helps maintain healthy arteries, supporting cardiovascular resilience over time*
- Strengthens the endothelial glycocalyx, the body’s vascular foundation, critical for energy, endurance, and healthy aging*
Frequently asked questions
What is rhamnan sulfate?
Rhamnan sulfate is a specialized, highly sulfated polysaccharide from the rare green seaweed Monostroma nitidum. It supports the endothelial glycocalyx (EGX), the inner lining of every blood vessel.*
What are the benefits of rhamnan sulfate from Monostroma nitidum?
Rhamnan sulfate supports the endothelial glycocalyx and helps maintain the entire endothelium, supporting healthy circulation and arterial health, with antioxidant properties that support vascular resilience.*
What does the science show on rhamnan sulfate?
Arterosil HP uniquely contains MonitumRS, a proprietary extract of rhamnan sulfate from Monostroma nitidum. MonitumRS is scientifically shown to protect and restore the endothelial glycocalyx.*†
Explore more research on rhamnan sulfate here.
What makes MonitumRS different from other rhamnan sulfate products?
MonitumRS is a proprietary, patented, full-spectrum, standardized extract of rhamnan sulfate from Monostroma nitidum, and it is the key ingredient in Arterosil HP.
†As demonstrated in an independent third-party laboratory in vitro study.
