Product Description
Every hard training session generates free radicals — reactive molecules that damage cell membranes, blood vessel walls, and connective tissue if your antioxidant defenses can't keep up.
Most athletes think about antioxidants in a vague, general sense. Thorne Grape Seed Extract makes the case more specifically: the oligomeric proanthocyanidins (OPCs) concentrated in grape seeds have a documented affinity for vascular tissue and connective tissue — the exact structures that endurance athletes beat up most.
This is targeted antioxidant support, not a general wellness supplement.
Phytosome Delivery – Most grape seed supplements use raw OPC extract that your body absorbs poorly. Thorne binds its OPCs to phosphatidylcholine — a phospholipid found naturally in cell membranes — so significantly more of the active compound actually reaches the tissues that need it.
Vascular Protection Where It Counts – OPCs protect the lining of your blood vessels from exercise-induced oxidative damage — the same tissue responsible for nitric oxide production and blood flow regulation. Protecting it daily supports the long-term vascular health your endurance performance is built on.
Stronger Connective Tissue, Less Bruising – OPCs have a natural affinity for collagen and elastin, the proteins that give tendons and ligaments their strength. Clinical studies in athletes show reduced swelling and faster recovery from sports injuries when OPCs are supplemented before competition, with less bruising thanks to reduced capillary permeability.
What Is This About OPCs?
They are among the most potent plant-derived antioxidants available — with some research suggesting greater free-radical scavenging capacity than vitamins C and E. They neutralize reactive oxygen species, bind iron and copper to reduce their oxidizing effects, and protect cell membranes from injury. The phytosome delivery in this formula ensures that potency is actually delivered to the tissues that need it.
How to Use Thorne Grape Seed Extract
Dosage: Take 1 capsule two to three times daily with food. Consistent daily use builds a baseline of OPC coverage that benefits both acute training sessions and longer-term vascular and connective tissue health.
- Gluten free
Supplement Facts
60 Servings
Serving Size: One Capsule
Serving Per Container: 60
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| Grape Seed Phytosome (Vitis vinifera extract / Phospholipid complex) 100mg | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
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Thorne Grape Seed Extract FAQ's
Everything you need to know before getting started.
OPCs — oligomeric proanthocyanidins — are potent antioxidant flavonoids concentrated in grape seeds. They have a documented structural affinity for vascular tissue and collagen, making them particularly relevant for endurance athletes who generate high levels of exercise-induced oxidative stress and repeatedly stress tendons, ligaments, and blood vessels. Research shows OPCs protect vascular endothelial cells, strengthen capillary walls, enhance collagen cross-linking, and reduce bruising and swelling following sports injuries.
Most grape seed supplements deliver raw OPC extract, which has limited bioavailability — much of it passes through without being absorbed. Leucoselect Phytosome® binds OPCs to phosphatidylcholine, a phospholipid naturally found in cell membranes. This complexing significantly improves absorption and ensures a meaningful amount of OPCs actually reaches the target tissues — blood vessels, connective tissue, and cell membranes — where their antioxidant work happens.
OPCs decrease capillary permeability — the tendency for blood to leak into surrounding tissue from damaged capillaries — which is what causes bruising. Clinical studies demonstrated reduced swelling and faster resolution of sports injuries in athletes who supplemented with OPCs before a sporting event. This effect is separate from the structural collagen benefits, though both contribute to faster recovery from soft-tissue injuries.
Leucoselect Phytosome® uses phosphatidylcholine derived from soy as the complexing agent. The phosphatidylcholine contains no soy protein and is not a soy allergen trigger for most individuals. However, athletes with severe soy allergies should check with their healthcare practitioner before use.