Exactly as listed on the label: Grape Seed Extract (Vitis vinifera) — seed — 100 mg.
What it is
Grape seed extract is made from the seeds left over after grapes are pressed for wine and juice. The seeds are dried, ground and extracted to concentrate their proanthocyanidins, often called OPCs. Prostacyl lists 100 mg.
Why formulas include it
OPCs are antioxidants: they help neutralize unstable molecules called free radicals. In Prostacyl, grape seed is part of an antioxidant group that also includes tomato lycopene and vitamin E. The idea is broad cell protection as part of healthy aging, rather than a single targeted action.
What the research says — honestly
Most grape seed research looks at blood vessel health, blood pressure and antioxidant markers in the blood. Studies focused on the prostate are few and mostly early-stage. So grape seed earns its place as a general antioxidant, not as a prostate-specific ingredient.
Safety notes
Grape seed extract is generally well tolerated. It may add to the effect of blood-thinning medicines, so check with your doctor if you take one.
Where it fits in Prostacyl
Grape Seed Extract is one of nine ingredients in each two-capsule serving of Prostacyl. It works alongside saw palmetto, pygeum africanum, pumpkin seed extract, nettle leaf and the rest of the formula, rather than on its own. You can see how the groups connect on the ingredients overview.
Sources
- Dietary Supplements: What You Need to KnowNIH Office of Dietary Supplements
