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  The peanut skin (the thin reddish-brown skin surrounding the peanut kernel) can contain proanthocyanidins—a class of polyphenolic compounds—in naturally high levels . When a supplier offers 95% proanthocyanidins , they are selling a highly refined extract that sits at the upper end of the concentration spectrum; top suppliers target a purity of 95% . Most standard peanut skin extracts hover at lower concentration levels for general use. To reach 95% purity, the extract must undergo a rigorous multi-stage process: starting with the collection of fresh peanut skins, followed by drying, milling, multiple rounds of solvent extraction using water or ethanol, and finally a concentration and spray-drying cycle to produce the finished powder . Each step adds cost, but the result is an ingredient with significantly higher potency and lower levels of inert material. The “UV” in the specification refers to UV-Vis spectrophotometry, a standard analytical method used to verify proanthocyanidi...

  Walk through any health and wellness trade show today, and you’ll see them everywhere. Booth after booth of suppliers claiming to offer the “purest” green tea extract. But here’s what experienced buyers have figured out: when a Chinese wholesaler lists “ 98% polyphenols ” with UV testing, they’re not throwing around marketing fluff. They’re making a specific, verifiable claim that actually means something. And that’s rarer than you might think. What 98% Polyphenols Actually Gets You Let’s cut through the technical jargon. Polyphenols are the compounds that give green tea its reputation—the catechins, the EGCG, the antioxidants that researchers keep finding new uses for. When a supplier offers 98% polyphenols, you’re looking at one of the most concentrated forms available on the wholesale market. Most standard green tea extracts hover between 50% and 80% polyphenols. That extra percentage points from 80% to 98% isn’t just a number. It means less filler, more active compounds, and ...