Grape Seed Extract is an extract which has been shown to be effective for lowering blood pressure. For this reason, you will sometimes find it in pump products. It has been shown to be an effective antioxidant.

GSE has been studied and shown to be effective for lowering systolic blood pressure. It has also been studied to be beneficial for blood flow. For this reason, it may be beneficial for people with leg swelling caused by prolonged periods of sitting, according to a study.

For the most part, it will not be the main ingredient in your pump product, but rather an add-on. 

You will find Grape Seed Extract paired with other common pump ingredients. Expect to see it paired with ingredients such as L-Citrulline, Nitrates,  Agmatine, and Glycerol Monostearate.

Some side effects that may occur when taking Grape Seed Extract include headaches, dizziness and nausea. Please talk to your doctor before considering supplementing with Grape Seed Extract.

A typical dose of Grape Seed Extract is 150mg-300mg per day for blood pressure purposes and increasing blood flow.

The following products contain Grape Seed Extract at the recommended dosage, and are recommended supplements for Fitness Informant: