The Effect of a Dietary Supplement Containing Rhamnan Sulfate from Monostroma nitidum on Carotid Atherosclerotic Plaque: A Case Series.

We report on 6 patients in our care who were harboring atherosclerotic plaque in the carotid arteries. This condition poses a risk of acute ischemic stroke and indicates potential atherosclerosis elsewhere in the vascular system. The plaque was revealed by routine ultrasound measurement of carotid intima-medial thickness (CIMT) defined as the distance between the lumen-intima interface and the media-adventitia interface. Recent improvements in image resolution and edge detection algorithms have resulted in improved reliability and clinical usefulness of the technology. The patients were enrolled in a systems-based functional medicine program of cardiology prevention to address root causes. The program provided personalized interventions that included drug therapy, dietary supplements, and lifestyle modification. The 6 patients followed the integrative regimen, which successfully managed existing cardiovascular symptoms and risk factors while keeping various biomarkers under control. However, they continued to exhibit carotid plaque with no improvement. A novel dietary supplement that targets endothelial glycocalyx regeneration was added to the personalized intervention programs. The supplement contains a proprietary extract of rhamnan sulfate from the green seaweed Monostroma nitidum. The 6 participants consumed the supplement daily, and their plaque burden was measured after 6 months using the same CIMT technology. In every case, the total plaque burden was reduced, with an average reduction in the 6 patients of 5.55 mm, which is statistically significant. Significant reductions in maximum carotid plaque thickness were also observed at the end of the 6 months. The study suggests that rhamnan sulfate from Monostroma nitidum may provide a safe and effective intervention for reducing atherosclerotic plaque, and should be evaluated as an adjunct therapy for prevention and treatment of cardiovascular disease.