How to Find the Lot Number on Food Packaging

The lot number is a code printed on food packaging that tells you which batch the product came from. You need this number to check if your food is part of a recall. The lot number usually appears on the back or bottom of the package, near the expiration date. It may be printed as "Lot," "Batch," "Code," or just a series of letters and numbers.

Understanding Lot Numbers and Why They Matter

When a food company discovers a problem—like contamination or an undeclared allergen—they recall only the affected batches. Not every package of a product gets recalled. The lot number tells you which specific batch your package came from.

Think of it this way: a bakery makes bread every day. If Monday's batch has a problem, only Monday's bread gets recalled. The lot number is how the company identifies Monday's bread from Tuesday's or Wednesday's.

Lot numbers are different from expiration dates. The expiration date tells you when the food goes bad. The lot number tells you when and where it was made. Both matter, but they do different jobs.

You'll see lot numbers on almost all packaged foods: cereal, yogurt, peanut butter, canned goods, frozen meals, baby formula, pet food, and more. Fresh foods like produce sometimes have lot codes too, though they're harder to spot.

Where to Look: Step-by-Step

Step 1: Check the back of the package first. Most lot numbers appear on the back panel. Look near the bottom or top edge.

Step 2: Look at the bottom or side of the package. If you don't find it on the back, check the bottom. Many companies print lot codes there.

Step 3: Look near the expiration or "best by" date. Lot numbers often sit right next to the date. They may be printed directly above, below, or beside it.

Step 4: Check the top of the package. Some products print the lot number on the top seal or lid.

Step 5: Look for these label formats:

• "Lot 12345"

• "L12345"

• "Batch 12345"

• "Code 12345"

• "Best by 01/15/2025 Lot A1B2C3"

• Just numbers or letters: "A1B2C3"

Step 6: Write it down. If you think your food might be recalled, write down the lot number exactly as it appears. Include any letters and numbers, in the same order.

What You Need to Know

Lot numbers are not the same as UPC codes. The UPC code (the barcode you scan at checkout) is the same on every package of that product. The lot number is different for each batch.

Lot numbers look different depending on the company. There's no single format. One brand might use "L" followed by numbers. Another might use letters and numbers mixed together. Some use dates (like "20250115" for January 15, 2025).

You don't need to memorize the lot number. Just know where to find it on your packages. When you check for recalls, you'll have the number ready.

Lot numbers help you act fast. If you see a recall notice, you can check your package in seconds. If the lot number matches, you know to stop using that product. If it doesn't match, your food is safe.

Common Questions

Q: What's the difference between a lot number and a batch number?

A: They mean the same thing. Companies use both terms. A batch is a group of products made together at the same time. The batch number (or lot number) identifies that group.

Q: Do all foods have lot numbers?

A: Most packaged foods do. Fresh foods like apples or lettuce sometimes have lot codes, but they're less common. Always check the recalls database to see if a specific product you own has been recalled.

Q: Why do I need the lot number if I already have the product name?

A: A recall might affect only certain batches of a product, not the whole product line. The lot number tells you if your package is the one that was recalled. Without it, you won't know if your food is safe or not.

Q: What should I do if I can't find the lot number?

A: Check every surface of the package carefully. Look under labels if they peel back. If you truly can't find it, contact the company's customer service number (usually on the package). They can help you locate it or answer questions about that product.

Q: Can I use the expiration date instead of the lot number?

A: No. The expiration date is not the same as the lot number. A recall notice will ask for the lot number specifically. The expiration date alone won't tell you if your package is affected.

When to Take Action

You don't need to do anything right now unless you've heard about a specific recall. But if you see a recall notice on the news or online, check your packages immediately. Find the lot number and compare it to the recall details. If your lot number matches, stop using the product and follow the recall instructions (usually return it to the store or throw it away). If your lot number doesn't match, your food is safe to use.

If anyone in your household has eaten the recalled product and you're worried about their health, contact your doctor or poison control. Don't wait. Check the recalls database for current recalls affecting products you use.

Stay Ahead of Recalls

Knowing where to find the lot number is the first step. The next step is staying informed. Recalls happen regularly, and new ones are announced all the time. You can't check every package you buy, but you can get alerts about products your family uses.

Set up free personalized recall alerts for the brands and products you care about. You'll get notified right away if something you own is recalled, so you can act fast. Set up free personalized recall alerts →