Most likely SkinCeuticals code locations
For SkinCeuticals, start with the box bottom. If the outer box is missing, move to the bottle base and then the dropper label.
Check the label around each marking to distinguish the production lot from product references; position and character count alone do not identify a lot.
- Check the box bottom under bright side light.
- Check the bottle base under bright side light.
- Check the dropper label under bright side light.
Numbers to ignore
Do not enter the retail EAN/UPC product number, shade number, SKU, ingredient registration number, or volume marking as the batch. Some scannable codes contain additional fields; use only an explicitly identified lot field, not the entire scan.
If several SkinCeuticals codes appear, identify the production lot from its label and the instructions for that product. Length alone cannot identify it. Keep every mark with its original location and never trim a longer identifier to make it fit.
When the print is hard to read
Embossed or low-contrast batch codes are easier to read with side lighting. Take a photo, zoom in, and preserve leading zeroes, separators, and letter case.
If the box and container disagree, check whether one string is a product reference. Preserve both markings separately while confirming their purpose.
SkinCeuticals product and package context
Look on the bottle base, label edge, tube crimp, or carton. Ingredient percentages and product references are not lot codes.
Vitamin C serums can change color through oxidation, while retinol and sunscreen require close adherence to packaging and date instructions.