Hyperhomocysteinemia is a rare condition which predisposes to arterial and venous thrombosis. Plasma homocysteine levels are influenced by many genetic factors and environmental factors. Increased levels of homocysteine at high-altitude areas (HAA) can predispose to upper-extremity deep-vein thrombosis (UEDVT). https://www.parisnaturalfoodes.shop/product-category/serratiopeptidase-90/