Grape seed extract is a dietary supplement often claimed to be beneficial for treating various conditions related to the heart and blood vessels. It appears to have antioxidant properties, protecting cells from free radicals (which play a role in age-related conditions, such as cancer and heart disease). Side effects that have been reported with this supplement include dizziness, nausea, and headaches.
What Is Grape Seed Extract?
Grape seed extract is a by-product of wine production. It is used medicinally for several different uses, many related to the heart and blood vessels.
Grape seed extract contains a variety of different compounds that may have medicinal activity. Many of these compounds seem to have antioxidant properties, protecting cells from free radicals (damaging molecules or atoms that can start a chain reaction of cellular damage). Free radicals play a role in various age-related conditions, such as cancer and heart disease. There may be other currently unknown ways that grape seed extract works for various uses.
Is Grape Seed Extract Effective?
In general, there is little scientific evidence to suggest that grape seed extract really is effective for most uses. However, early research shows promise for a few different grape seed extract uses.
Written by/reviewed by: Kristi Monson, PharmD;Arthur Schoenstadt, MD
Last reviewed by: KristiMonson, PharmD;
List of references (click here):
Jellin JM, editor. Pharmacist's Letter/Prescriber's Letter Natural Medicines Comprehensive Database Web site. Available at: http://naturaldatabase.com/. Accessed October 15, 2008.
National Center for Complimentary and Alternative Medicine. National Institutes of Health. Herbs at a glance: Grape seed extract (May 2008). NCCAM Web site. http://nccam.nih.gov/health/grapeseed/. Accessed October 15, 2008.
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