Onion Peel: Buyer Guides & Technical Articles

All Onion Peel articles

• Onion Peel Extract Buyer's Guide: Quercetin, Grades & Sourcing Buyer's Guide
  A B2B buyer's guide to bulk onion peel extract — 10:1 native vs quercetin-standardised grades, peel vs bulb source, CoA essentials and sourcing from India.
• Onion Peel Extract: Regulatory & Compliance Regulatory
  FSSAI & GMP status, heavy-metal and microbial limits, labelling and export documentation for bulk onion peel extract (Allium cepa) shipped from India.
• Onion Peel vs Bulb Extract & the Colour Test Comparison
  Why onion skin out-concentrates the bulb for quercetin, what the powder colour tells you, and how to authenticate Allium cepa peel extract before you buy.
• Quercetin & Onion Flavonols: Benefits & Constituents Science & Benefits
  The actives in onion peel extract — quercetin, its glucosides and kaempferol — their bioavailability and the human evidence behind the claims.
• Quercetin: HPLC vs UV Testing & the Assay Trap Testing & Quality
  Why quercetin by HPLC and total flavonoids by UV give different numbers on onion peel extract — the assay trap and how to read the CoA correctly.

View the Onion Peel product page — specifications, grades and documentation →

Browse the full archive on the Insights hub.