NOW Grape Seed Extract Maximum Strength 500 mg – 90 Veg Capsules

NOW® Grape Seed Extract Maximum Strength delivers a potent 500 mg of concentrated polyphenols from authentic red grape seeds (Vitis vinifera) in a single daily vegetarian capsule. Standardized to contain at least 90% total polyphenols, this high-potency formula targets your blood vessel walls to promote smooth circulation, capillary elasticity, and a robust immune response. With twice the grape seed extract of extra-strength 250 mg formulas and five times the strength of standard 100 mg capsules, each vegetarian capsule provides maximum cellular defense to keep your cardiovascular system resilient and energetic.

Quick Specs Snapshot

• ✓ Active Form & Potency: 500 mg of Grape Seed Extract standardized to a minimum of 90% Total Polyphenols (yielding at least 450 mg of active bioflavonoids) per single veg capsule.
• ✓ Primary Cellular Target: Blood vessel endothelial lining, delicate micro-capillary walls, nitric oxide signaling pathways, and structural collagen networks.
• ✓ Supply & Value Math: 90 vegetarian capsules per bottle (a full 3-month daily supply at 1 capsule per day), delivering maximum strength potency at an everyday low cost per milligram.
• ✓ Formulation Purity: 100% vegetarian capsule; non-GMO; free of yeast, wheat, gluten, soy, milk, egg, fish, shellfish, tree nut, and sesame ingredients; packaged in an eco-friendly post-consumer recycled (PCR) resin bottle.

Buyer’s Guide: Maximum Strength Polyphenols vs. Cheaper Alternatives

Why the Form Matters

Many discount brands sold at big box retail stores use cheap, unstandardized grape pomace or leftover winery mash. These raw powders often contain less than 10% active compounds, leaving you with useless woody plant fiber that passes straight through your digestive tract without offering real cellular support [1]. NOW uses an advanced botanical extraction process standardized to deliver a guaranteed minimum of 90% total polyphenols rich in oligomeric proanthocyanidins (OPCs) [1, 2]. By providing a full 500 mg per capsule—twice the active extract of extra-strength 250 mg formulas—this maximum strength formula delivers the exact concentration needed for robust vascular and immune support without having to swallow multiple pills throughout the day [2, 3].

Is This Formula Right for You?

• ✓ Vascular & Healthy Circulation Support: Ideal for anyone who spends long hours sitting or standing and wants to reinforce vein elasticity, support healthy blood flow, and keep legs feeling light and comfortable [2, 3].
• ✓ Maximum Strength Cellular & Immune Defense: Perfect for shoppers seeking maximum free-radical defense powered by a clinically studied 500 mg dose of pure botanical bioflavonoids [1, 4].
• ✓ Collagen, Skin & Capillary Integrity: Great for men and women wanting to protect the structural collagen and elastin proteins in skin and blood vessels from everyday oxidative wear and tear [1, 2].

• ✗ You are taking prescription blood thinners: Concentrated grape seed polyphenols naturally support smooth platelet flow; always consult your prescribing doctor before adding high-dose botanical extracts to your regimen [2, 5].
• ✗ You have an active allergy to grapes: This pure supplement is extracted directly from genuine Vitis vinifera seeds and should be avoided by individuals with grape allergies.
• ✗ You are pregnant or nursing: Concentrated botanical extracts are formulated for non-pregnant adults; speak with your healthcare provider to identify appropriate prenatal nutrients.

Risk-Free Assurance: Every purchase is backed by VitaNet®, LLC’s unconditional 100% money-back guarantee—even on opened bottles, with return shipping covered—so you can evaluate digestive comfort and personal fit risk-free.

How It Works: Cellular Pathways & Vascular Defense

Think of your body like an active car engine. When an engine runs, it burns fuel and produces heat, exhaust smoke, and tiny sparks. Inside your body, everyday activities like breathing, digesting food, exercising, and spending time in the sun create unstable molecules called free radicals (such as superoxide O₂^•− and hydroxyl radicals •OH) [1, 4]. These free radicals are missing an electron. In their hurry to balance themselves, they steal electrons from your healthy cell membranes, proteins, and cellular DNA. This chemical theft is called oxidation—the exact same process that turns a sliced apple brown or makes outdoor metal rust [1, 4].

Grape seed extract contains concentrated plant nutrients called Oligomeric Proanthocyanidins (OPCs). OPCs work like microscopic fire blankets [1]. Because of their unique chemical shape, OPCs can safely donate electrons to neutralize dangerous free radicals without becoming harmful themselves [1, 4]. Published clinical research shows that grape seed OPCs deliver significantly higher antioxidant activity against free radicals than Vitamin C or Vitamin E alone [1].

Protecting Your Blood Vessel “Garden Hoses”

Your blood vessels work much like flexible garden hoses. Their interior is lined with a delicate single layer of cells called the endothelium. These endothelial cells produce an essential messenger gas called nitric oxide (NO) [2, 3]. Nitric oxide signals the smooth muscles around your blood vessels to relax, open wide, and allow blood to flow smoothly and effortlessly throughout your body [2, 3]. Free radicals attack and break down nitric oxide, causing blood vessels to become stiff and narrow. Grape seed polyphenols shield nitric oxide from oxidative destruction, helping blood vessels maintain their natural flexibility and healthy vascular tone [2, 3, 5].

Guarding Collagen & Elastin Scaffolding

Your veins, tiny capillary walls, and skin rely on two main structural proteins: collagen (which acts like strong steel beams) and elastin (which acts like springy rubber bands) [1, 2]. Normal wear and tear triggers enzymes called collagenase and elastase, which slowly break these fibers down. Grape seed OPCs bind directly to collagen and elastin fibers, forming a protective barrier that stops these enzymes from weakening your vascular and skin structures [1, 2].

Daily Dosing, Timing & Synergy Protocol

Optimal Timing & Meal Pairing

Take 1 veg capsule daily with a meal [1, 3]. While grape seed polyphenols are water-soluble and can cross the intestinal wall on an empty stomach, taking this maximum strength 500 mg dose with breakfast or lunch is the best approach. Concentrated botanical polyphenols contain natural astringent tannins that can cause mild stomach warmth or temporary queasiness if taken without food. Swallowing your capsule alongside a meal ensures smooth digestion and steady absorption into the bloodstream [1, 3].

Circadian & Daily Dosing Strategy

Because this formula provides a maximum strength 500 mg dose, one single capsule in the morning with breakfast delivers sustained antioxidant and circulatory support throughout your active daytime hours [2, 3]. Taking your capsule with morning food aligns with your body's natural cardiovascular and metabolic activity patterns.

Smart Synergies & Spacing Rules

• ✓ Flavonoid Teamwork (Citrus Bioflavonoids & Rutin): Grape seed OPCs pair naturally with citrus bioflavonoids to support microvascular permeability, reinforcing the delicate walls of capillaries in the legs and eyes [2].
• ✓ Circulation Partnership (Coenzyme Q10): While grape seed polyphenols support blood vessel flexibility and nitric oxide production, CoQ10 supplies clean cellular energy (ATP) to the heart muscle cells pumping blood through those vessels.
• ✗ The 2-Hour Iron Spacing Rule: Plant polyphenols naturally bind to non-heme iron (iron found in plant foods or multivitamin pills) inside your stomach, forming an insoluble complex that reduces mineral uptake. Space your grape seed capsule at least 2 hours away from high-dose iron supplements.

Timeline of Expectations

• ✓ Week 1: Rapid intestinal uptake of polyphenols elevates circulating antioxidant activity across blood plasma to help neutralize daily oxidative stress [1, 4].
• ✓ Weeks 3–4: Nutrients accumulate in vascular tissues, supporting micro-capillary strength, healthy leg vein comfort, and cellular immune defenses [2, 3, 5].
• ✓ Months 2–3+: Cumulative collagen cross-linking and structural reinforcement in veins and skin; long-term support for nitric oxide pathways and cardiovascular flexibility [1, 2, 3].

Capsule Size, Natural Sensory Profile & Clean Excipients

Delivery Format & Swallowability

NOW Grape Seed Extract Maximum Strength 500 mg is encapsulated in a standard Size 00 vegetarian two-piece capsule. It measures approximately 23 mm (under one inch) in length with a smooth, slippery exterior when moistened. Unlike hard compressed tablets that can feel chalky or scrape against the throat, this plant-cellulose shell glides down easily with a standard sip of water and dissolves rapidly in the stomach.

Natural Aroma, Taste & Color Notes

Inside each transparent vegetarian capsule is a fine, reddish-brown to deep purple botanical powder. Because NOW uses pure, unbleached plant extracts without synthetic dyes or artificial colorings, slight differences in powder shade from one harvest batch to another are completely normal. It carries a mild, pleasant aroma of dried grape skins and a slightly tart botanical finish.

Other Ingredients Demystified

• Hypromellose (cellulose capsule): A clean, 100% vegetarian capsule shell crafted from natural plant wood pulp that breaks down quickly and cleanly in stomach acid.
• Ascorbyl Palmitate: A fat-soluble form of Vitamin C that shields the delicate botanical extract from oxygen breakdown during encapsulation while acting as a natural, clean flow agent.
• Stearic Acid (vegetable source): A natural plant-derived fatty acid used as a clean manufacturing lubricant to keep fine herbal powders flowing smoothly into capsules without sticking to machinery.

Storage & Packaging

Store your bottle tightly sealed in a cool, dry pantry or cabinet after opening. Keep supplements away from steamy bathrooms or hot kitchen stoves. Every bottle is molded from eco-friendly resin, protecting your capsules from ultraviolet light degradation while keeping moisture out.

NOW Foods In-House Laboratory Testing & Contaminant Standards

Don’t gamble your cardiovascular health on cheap big-box store vitamins. Supermarket and discount warehouse brands often purchase unverified bulk powders from overseas brokers. Because they rarely invest in advanced testing equipment, their products frequently contain heavy metal impurities, agricultural pesticide residues, or degraded active ingredients that fall far below the label claim. In contrast, NOW operates over 40,000 square feet of in-house testing laboratories accredited to ISO/IEC 17025:2017, conducting more than 19,000 separate analytical tests every single month to guarantee absolute safety and verified potency:

• ✓ Heavy Metal Screening (ICP-MS): Utilizing Inductively Coupled Plasma Mass Spectrometry, every single production lot is screened down to parts-per-billion (ppb) concentrations for lead, arsenic, cadmium, and mercury, ensuring strict California Proposition 65 compliance.
• ✓ Polyphenol Potency Verification (HPLC): High-Performance Liquid Chromatography tests confirm that every capsule delivers the guaranteed minimum 90% total polyphenols (supplying at least 450 mg of active bioflavonoids), ensuring you never receive diluted plant filler.
• ✓ Pesticide & Solvent Screening (GC-MS/MS & LC-MS/MS): Advanced Gas and Liquid Chromatography tandem mass spectrometers screen incoming botanical raw materials against hundreds of agricultural sprays, chemical residues, and extraction solvents.
• ✓ Microbiological Pathogen Clearance: Comprehensive DNA and culture testing confirms zero presence of hazardous organisms, including Salmonella spp., Escherichia coli, and Staphylococcus aureus, alongside strict limits for yeast and mold.
• ✓ Audited cGMP Manufacturing: NOW facilities are independently audited and certified by UL Solutions and maintain an "A-rated" Good Manufacturing Practices (cGMP) registration through the Natural Products Association (NPA).

Supplement Facts & Retailer Verification