Siphonaxanthin is a keto-carotenoid with anti-angiogenic and anti-inflammatory activity, which is found in green algae. Siphonaxanthin upregulates the expression of death receptor 5 (DR5), induces cancer cell apoptosis, decreases the expression of Bcl-2, and activates caspase-3. Siphonaxanthin is also an inhibitor of FGFR-1. Siphonaxanthin inhibits the proliferation, migration, and tube formation of human umbilical vein endothelial cells (HUVECs), as well as the outgrowth of microvessels in the rat aortic ring. Siphonaxanthin is promising for research of diseases such as cancer, diabetic retinopathy, and rheumatoid arthritis.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.