Life Extension, Vitamin C and Bio-Quercetin Phytosome – Vitamin C Plus High-Absorption Quercetin for Immune Support – Gluten Free, Non-GMO, Vegetarian – 250 Veggie Tablets

Expert note

"High-Quality Standard Formula Product with Competitive Pricing and Strong Brand Evaluation Score"Among standard formulation products (without special techniques such as liposomal forms), this product falls into the good price competitiveness category among those with undisclosed raw material origin (most likely Chinese sourced). It is priced approximately 1.5 times higher than the most competitively priced product. Aside from the undisclosed raw material origin, the product scores highly in brand evaluation (74 points, average approximately 56 points) with the following attributes: NON-GMO sourced raw material extraction, GMP mark present, and vegan-compatible formulation. In the quality assessment purity category, the product achieves the highest score with purity above 90% (average approximately 70%). In the secondary ingredient assessment, it receives the highest score by containing no synthetic additives such as flavoring agents, sweeteners, or colorants, and by being free of important excipients including carboxymethyl cellulose, silicon dioxide, and magnesium stearate.