Cosmetic Batch Code Guides
Expert tutorials and comprehensive guides to help you understand batch codes, expiration dates, and keep your beauty collection safe.
Getting Started
Complete Guide to Cosmetic Batch Codes
Learn everything about batch codes, how to find them, and what they mean for your cosmetics.
How to Find Batch Codes on Any Cosmetic Product
Step-by-step visual guide showing you exactly where to look for batch codes on bottles, tubes, and packaging.
Understanding Cosmetic Shelf Life: Unopened vs. Opened
SoonThe difference between shelf life and PAO, and how to calculate when your products really expire.
Complete Guide to PAO Symbols: What 6M, 12M, and 24M Really Mean
Understanding the Period After Opening (PAO) symbol on cosmetics. Learn what the open jar icon means and how to calculate product expiration.
Why Your Batch Code Is Not Found: Troubleshooting Guide
SoonWhat to do when our checker cannot decode your batch code, and how to verify production dates manually.
Product Safety & Risks
The Dangers of Using Expired Cosmetics: What You Need to Know
SoonFrom skin infections to accelerated aging, learn the real risks of using expired beauty products.
Never Use Expired Sunscreen: The Invisible Danger
SoonWhy expired sunscreen is the most dangerous expired cosmetic, and how it puts you at risk for UV damage.
Vitamin C and Retinol Oxidation: When to Replace Your Serums
SoonHow to tell if your high-end skincare has oxidized and lost its potency (or become harmful).
Eye Product Safety: Why Mascara Expires So Fast
SoonThe serious infection risks of expired eye makeup, and why the 3-month rule exists for good reason.
Product Type Guides
Perfume Storage and Shelf Life: Do Fragrances Expire?
SoonHow perfume turns sour, how long different fragrance types last, and the best way to store your collection.
Natural and Organic Cosmetics: Shorter Shelf Life Explained
SoonWhy clean beauty products expire faster, and how to identify when your natural cosmetics have gone bad.
Discount Store Shopping: How to Check Cosmetic Freshness at TJ Maxx
SoonIn-store guide for checking batch codes and avoiding expired products at discount retailers like TJ Maxx and Marshalls.
Complete Guide to PAO Symbols: What 6M, 12M, and 24M Really Mean
Understanding the Period After Opening symbol, and why it matters more than expiration dates.
Brand-Specific Guides
Estée Lauder Group Batch Code Decoder
SoonHow to read batch codes for Estée Lauder, La Mer, MAC, Clinique, and other brands in the group.
L'Oréal Group Batch Code Decoder
SoonUnderstanding batch codes for Lancôme, Kiehl's, YSL, and other L'Oréal brands.
LVMH Group Batch Code Decoder
SoonHow to decode Dior, Guerlain, Givenchy, and other LVMH brand batch codes.
Ready to Check Your Cosmetics?
Select your brand and enter your batch code to instantly reveal the production date.
Start Checking Batch Codes