The short answer · Vascular function
Take grape seed extract for vascular function. This is the one to buy.
Nutricost, Grape Seed Extract, 240 Capsules (400 mg per Capsule)
4.8· 1,160 ratings· $0.07/serving
Grape Seed Extract 400 mg — inside the studied 150-400 mg window
Of 2,636 products scored for Vascular function, Nutricost, Grape Seed Extract, 240 Capsules (400 mg per Capsule) ranks #1 with a DoseRank score of 85. Grape Seed Extract has moderate human evidence for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Grape Seed Extract — not Vitamin K2 (Menaquinone-7, MK-7)?”Evidence Moderate evidence
Grape Seed Extract has moderate human evidence for this outcome.
- Grape Seed ExtractThe pick
Moderate evidence · 400 mg
Polyphenol-rich extract supplying oligomeric proanthocyanidins (OPCs); a potent antioxidant typically taken to support blood vessels and circulation.
- Vitamin K2 (Menaquinone-7, MK-7)
Moderate evidence · 120 mcg
Long-chain (MK-7) form of vitamin K2 with a notably longer half-life than MK-4; helps direct calcium into bone and away from arteries.
The dose“Is the dose actually effective?”Dose fit 90
Grape Seed Extract at 400 mg lands inside the studied 150-400 mg window.
Grape Seed Extract
Studied window 150-400 mg · this pick 400 mg
The ranking“Why should I trust this pick?”Trust 79
Solid trust signals from buyer ratings, with room to grow. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 2,636 products scored
- Never paid placement
- Evidence level: Moderate · 78
- 290 brands
- 9 ingredients
The price“Can I do better than $0.07 a serving?”Value 90
$0.07 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.07 per serving.
- 5Nutricost, Vitamin K2 MK-7, 100 mcg, 240 SoftgelsScore 84 · $0.07/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $0.07 a serving.Nutricost, Grape Seed Extract, 240 Capsules (400 mg per Capsule) — in stock at a tracked retailer.
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Nutricost, Grape Seed Extract, 240 Capsules (400 mg per Capsule) ranks #1 for Vascular function with a DoseRank score of 85. The score blends clinical strength, evidence, dose fit, trust signals and value across 2,636 products scored for this outcome.
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