What makes Leucoselect Phytosome different from regular grape seed extract?

Leucoselect Phytosome binds oligomeric proanthocyanidins (OPCs) to phosphatidylcholine molecules, forming a lipid-compatible complex that significantly improves absorption across intestinal membranes compared to standard grape seed extract. This phytosome technology, developed by Indena S.p.A., increases the bioavailability of OPCs so that lower doses may achieve comparable or superior plasma antioxidant effects. Standard grape seed extracts are hydrophilic and poorly absorbed without this lipid carrier system.

What is the recommended dosage of Leucoselect Phytosome?

Clinical studies and manufacturer protocols commonly use doses of 75–150 mg of Leucoselect Phytosome per day, often split into two doses, which corresponds to a lower OPC intake than standard grape seed extract due to enhanced bioavailability. Some formulations in cardiovascular-focused trials have used up to 300 mg daily. Users should follow product-specific labeling and consult a healthcare provider, as optimal dosing has not been definitively established in large independent trials.

Can Leucoselect Phytosome reduce LDL cholesterol oxidation in smokers?

Clinical evidence reported by the manufacturer indicates that Leucoselect Phytosome supplementation reduces the susceptibility of LDL particles to oxidative modification in heavy smokers, a population with substantially elevated systemic oxidative stress. Oxidized LDL is a key driver of foam cell formation and atherogenesis, making this a clinically relevant outcome. However, full peer-reviewed publication details for this specific study, including sample size and duration, have not been independently confirmed in the public literature.

Is Leucoselect Phytosome safe to take with blood thinners?

Leucoselect Phytosome should be used with caution alongside anticoagulant and antiplatelet medications such as warfarin, heparin, aspirin, or clopidogrel, because OPCs can inhibit platelet aggregation and may potentiate bleeding risk. The phosphatidylcholine component itself is generally neutral regarding coagulation. Anyone taking prescription blood thinners should consult their physician and potentially have INR or bleeding time monitored before adding this supplement.

Does Leucoselect Phytosome help with blood sugar or glucose metabolism?

Available evidence suggests that Leucoselect Phytosome may improve markers of oxidative stress in individuals with impaired glucose metabolism, a condition associated with chronically elevated reactive oxygen species. OPCs have been shown in preclinical models to influence glucose transporter activity and inhibit alpha-glucosidase enzymes, potentially blunting postprandial glucose spikes. However, clinical data specifically demonstrating blood glucose-lowering effects in diabetic or pre-diabetic populations using this proprietary phytosome form remains limited and should not be considered a substitute for established glucose management therapies.

How does the Phytosome delivery system improve the absorption of Vitis vinifera extract?

Leucoselect Phytosome uses a proprietary phospholipid complex technology that binds grape seed proanthocyanidins to phosphatidylcholine, enhancing their bioavailability and cellular uptake compared to unbound extract. This delivery system allows the polyphenols to better cross the intestinal barrier and reach target tissues more effectively. The Phytosome formulation is designed to protect the delicate compounds from degradation in the digestive tract, resulting in higher plasma concentrations of active constituents.

Who would benefit most from taking Leucoselect Phytosome supplementation?

Leucoselect Phytosome may be particularly beneficial for smokers and former smokers seeking to reduce LDL oxidation, individuals with impaired glucose metabolism or metabolic concerns, and those looking to enhance overall antioxidant status and immune function. People exposed to chronic oxidative stress from pollution, exercise, or lifestyle factors may also benefit from its antioxidant support. Those without contraindications to grape seed compounds can use it as part of a comprehensive preventive health regimen.

How strong is the clinical evidence supporting Leucoselect Phytosome's health benefits?

Leucoselect Phytosome is supported by multiple human clinical studies demonstrating measurable improvements in antioxidant capacity and LDL oxidation resistance, though published peer-reviewed data with full methodological detail is limited in public scientific databases. The manufacturer cites human research showing benefits for glucose homeostasis and immune function, but independent verification through large, well-designed randomized controlled trials would strengthen the evidence base. Most available evidence comes from studies sponsored by or affiliated with the manufacturer rather than independent third-party research.

Leucoselect Phytosome (Vitis vinifera extract)

Leucoselect Phytosome is a patented grape seed extract (Vitis vinifera) standardized to oligomeric proanthocyanidins (OPCs) and complexed with phosphatidylcholine to enhance bioavailability. It exerts antioxidant effects primarily by scavenging reactive oxygen species and inhibiting LDL oxidation, supporting cardiovascular health.

Category: Other Evidence: 2/10 Tier: Moderate

Leucoselect Phytosome (Vitis vinifera extract) — Hermetica Encyclopedia

Origin & History

Leucoselect Phytosome is a branded extract derived from grape seeds (Vitis vinifera L.) combined with phospholipids from non-GMO soy lecithin using Indena's Phytosome® delivery technology. The extract is standardized to contain 25-36% oligomeric proanthocyanidins (OPCs), with 80% consisting of smaller, more bioavailable molecules including dimers, trimers, tetramers and gallates.

Historical & Cultural Context

No information on historical or traditional medicinal uses of Leucoselect Phytosome or grape seed extract in traditional systems is available in the research sources. Leucoselect Phytosome is a modern branded extract developed using contemporary extraction and delivery technology.

Health Benefits

• Enhances plasma total antioxidant capacity in healthy volunteers (human studies cited by manufacturer, no PMIDs available)
• Reduces LDL oxidation susceptibility in heavy smokers (clinical evidence reported, study design not detailed)
• Improves oxidative status in individuals with impaired glucose homeostasis (human research referenced without full methodology)
• Supports immune function and life conditions in elderly subjects (clinical trials mentioned but lacking specific identifiers)
• Decreases lipid peroxidation by 20% versus placebo (one report cited, study specifics not provided)

How It Works

Leucoselect Phytosome delivers oligomeric proanthocyanidins (OPCs) complexed with phosphatidylcholine, a delivery system that increases intestinal absorption compared to unbound grape seed extract. OPCs directly scavenge superoxide, hydroxyl, and peroxyl radicals, and chelate transition metal ions such as iron and copper that catalyze lipid peroxidation via Fenton-type reactions. Additionally, OPCs upregulate endogenous antioxidant enzymes including superoxide dismutase (SOD) and glutathione peroxidase, and may modulate NF-κB signaling to reduce pro-oxidant and pro-inflammatory gene expression.

Scientific Research

Human studies on Leucoselect Phytosome demonstrate various antioxidant effects, though specific trial details, sample sizes, and PubMed identifiers are not provided in available sources. The manufacturer references studies on plasma antioxidant capacity, LDL protection in smokers, glucose homeostasis, and elderly immune function, but these lack full study designs or PMIDs. One report mentions a 20% reduction in lipid peroxidation compared to placebo.

Clinical Summary

Human clinical studies cited by the manufacturer have demonstrated that Leucoselect Phytosome supplementation increases plasma total antioxidant capacity (TAC) in healthy volunteers, though specific sample sizes and PMIDs are not publicly available for independent verification. A reported clinical trial in heavy smokers showed measurable reductions in LDL oxidation susceptibility, a surrogate marker of atherosclerosis risk, though study design details remain limited. Additional evidence suggests improvements in oxidative status biomarkers in individuals with impaired glucose metabolism, a population with chronically elevated oxidative stress. Overall, the evidence base is promising but relies substantially on manufacturer-cited data; independent, large-scale randomized controlled trials are needed to confirm efficacy and establish optimal dosing.

Nutritional Profile

Leucoselect Phytosome is a proprietary formulation combining a standardized grape seed extract (Vitis vinifera) with soy phospholipids (phosphatidylcholine) via Indena's Phytosome technology to enhance bioavailability. It is not a macronutrient source (negligible protein, fat, carbohydrate, and fiber per typical dose). Key bioactive compounds: **Proanthocyanidins (oligomeric proanthocyanidins/OPCs):** standardized to ≥90% total polyphenols, with the primary active constituents being procyanidin B1, procyanidin B2, procyanidin B3, catechin, epicatechin, and gallic acid. Typical doses used in clinical settings range from 150–300 mg/day of the phytosome complex. **Phosphatidylcholine:** derived from soy lecithin, serves as the complexation agent at an approximate 1:1 to 1:2 w/w ratio with grape seed extract, forming a lipophilic matrix that significantly improves gastrointestinal absorption of the otherwise poorly bioavailable polyphenolic compounds. **Approximate polyphenol content per dose (150–300 mg complex):** total proanthocyanidins ~70–135 mg, monomeric catechins (catechin + epicatechin) ~15–30 mg, gallic acid ~3–8 mg. **Minerals and vitamins:** not a significant source. **Bioavailability notes:** The phytosome complexation with phosphatidylcholine substantially increases oral bioavailability of grape seed proanthocyanidins compared to non-complexed extracts; studies on similar Phytosome formulations report 2–4-fold increases in plasma polyphenol levels. OPCs are otherwise subject to poor absorption due to high molecular weight and hydrophilicity; the phospholipid complex facilitates transcellular transport across the intestinal epithelium. Peak plasma levels of catechin metabolites are typically reached within 2–3 hours post-ingestion. Metabolites include glucuronidated and methylated forms of catechin/epicatechin processed via phase II hepatic metabolism. No significant caloric contribution at recommended doses (~1–2 kcal per dose).

Preparation & Dosage

The clinically studied dosage is 300 mg per day of Leucoselect Phytosome powder, standardized to 25-36% proanthocyanidins. Commercial products typically contain 100 mg per capsule (25-30% proanthocyanidins) or 50 mg in combination formulas, taken with food. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Vitamin C, Vitamin E, Coenzyme Q10, Maritime Pine Bark Extract, Resveratrol

Safety & Interactions

Leucoselect Phytosome is generally well tolerated at studied doses, with grape seed extract broadly considered safe at 100–300 mg per day in healthy adults. Because OPCs can inhibit platelet aggregation and possess mild anticoagulant properties, concurrent use with anticoagulant or antiplatelet medications such as warfarin, aspirin, or clopidogrel may increase bleeding risk and warrants medical supervision. Grape seed extract may also interact with cytochrome P450 enzymes (particularly CYP3A4), potentially altering metabolism of certain drugs. Safety data in pregnant or breastfeeding women is insufficient, and use during pregnancy is not recommended without physician guidance.