Food labels & kitchen
A1C meaning, plus four label terms, in plain words.
Five terms, one glossary card, and an invented label to try them on before you shop.
Uses a fictional practice label with invented values.
Your care team said to eat better, and you left with a lab report and no instructions. In the store, one package says whole grain and the next says sugar-free, and neither explains what your A1C has to do with any of it. This page is the glossary to keep open on your phone: five terms in plain words, and an invented label to try them on.
Two kinds of words get mixed up.
Most of the fog comes from mixing a lab word with a package word. They appear in different places and answer different questions, so keep them in separate columns in your notes.
| Where the word comes from | Examples | What it describes |
|---|---|---|
| Your lab report | A1C | A blood test your care team may order and explain |
| The food package | Serving size, servings per container, added sugars | How the numbers on that label are organized |
| A package front, a website or a group post | Net carbs | A word the FDA label guides do not define, so treat it as a claim to check |
A label term is not a lab term, and one does not convert into the other.
A label term tells you what a printed number describes. A lab term names a test your care team may order. Neither one decides what belongs in your cart. Once the two lists sit apart in your notes, the guessing gets quieter.
The five-term glossary card.
Read this once now, then come back to it in the store. Each definition is short on purpose.
| Term | In plain words | Where you meet it |
|---|---|---|
| A1C | The name of a blood test. MedlinePlus covers the A1C test in its page on prediabetes; it is a test your care team may order and explain. It is not a nutrient, not a label line, and not printed on any food package. | Your lab report and your care-team conversations |
| Serving size | The amount the nutrition numbers on a label are based on. The FDA says it is written as a household measure such as a cup, piece or slice, followed by the metric amount in grams, and states plainly that it is not a recommendation of how much to eat or drink. | The top of the Nutrition Facts label |
| Servings per container | How many of those servings the package holds. The FDA notes that one package of food may contain more than one serving. Some packages also print a second, per-package column for the whole container; the FDA calls these dual-column labels, and when that column is there you read it instead of multiplying. | Beside the serving size, at the top of the label |
| Added sugars | A line printed under Total Sugars. Read the indented lines as parts of the line above them, so added sugars is already counted inside total sugars rather than added on top. | In the carbohydrate block, below Total Sugars |
| Net carbs | A word you will see on packages, websites and group posts, but not one of the lines the FDA label guides explain. It is a calculated number, and the package rarely shows the calculation. Treat it as a claim to check. | The front of a package, a website, a group post |
Definitions follow the FDA label pages and the MedlinePlus prediabetes page listed under Sources. “Net carbs” is not defined on any of them. For more, see Net carbs is not a label term.
Practice on a fictional label.
Here is an invented label. It borrows the serving numbers from Exercise 3 in the free workbook, so the practice carries over when you open that page.
| Serving size | 1 cup |
|---|---|
| Servings per container | 2 |
| Total carbohydrate | 18 g per serving |
| Added sugars | 2 g per serving |
18 g × 2 = 36 g of carbohydrate for the whole package
Invented values for arithmetic practice only. Not a recommended serving, food choice or target.
Now answer four questions using only the card above.
- What is the 18 g based on? One serving. Write “per serving” beside it before you multiply.
- What does the package hold? Two servings, so 18 g × 2 = 36 g, and the answer is labeled “whole package.”
- Is “net carbs” printed here? No. There is nothing to subtract and nothing to check. If a real package does print it, ask who calculated it.
- Which term on this card is a lab term? A1C, and it does not appear on this label at all.
That last question is the one worth remembering. No food package can tell you what your A1C means, and no label term is a stand-in for the conversation with your care team.
Why a glossary, not a treatment plan.
You may have come looking for something to take or a plan to follow, and landed on a page asking you to read labels instead. That is a fair thing to be disappointed about. Here is the honest version of what this page is and is not.
- It is education. This site explains how to read a label, check a source and prepare questions. It does not diagnose, treat, or tell you what to eat, how much, or which supplement to try.
- Nothing is being sold here. No products are for sale on this site today and no affiliate links are active. If that changes, the Affiliate Disclosure and Privacy Policy change first.
- You can use this page without handing anything over. The glossary, the practice label and the FDA and MedlinePlus pages linked below are open. The free workbook is a printable PDF that asks for a first name and email; reading this page does not.
- Every example is invented and labeled. The label above says so in its first line.
What the page cannot do: it cannot tell you what your A1C means for you, or which foods to buy. Those belong with your care team. What it can do is turn the package words from fog into something you can point at, so the conversation starts from a place you already understand.
If an ad promises a fast fix, that promise is your reason to check who wrote it and what evidence is shown before you spend money. The FDA keeps a consumer page on illegally sold diabetes treatments. Before you trust a health article, check one claim walks through the habit, and the free Source Credibility Checklist gives you eight checks in two pages.
Do one term in five minutes.
A glossary only helps if you use it once. Pick a single package from your kitchen and run this drill. It needs no scale and no app.
Copy the serving size exactly.
Both parts, as printed: the household measure and the grams.
Write the servings per container beside it.
Draw a box around the pair so those two numbers stay together.
Choose one nutrition number and name its basis.
Write “per serving” or “per package” before you do any arithmetic.
Look for the words “net carbs.”
If they are printed, note who calculated the number. If you cannot tell, that is your answer for today.
- I copied the serving size with both units.
- I wrote the servings per container next to it.
- I labeled each number “per serving” or “per package.”
- I noted whether “net carbs” was printed, and who claimed it.
- I kept the note where I will see it before the next shopping trip.
One package, five minutes, one term a little clearer. That is enough for a first pass.
Questions people ask.
What does net carbs mean on a package?
It is not one of the lines the FDA label guides explain, and the package rarely prints the calculation behind it. Treat it as a claim to check: find out who calculated the number and what they subtracted before you rely on it.
What does servings per container mean?
It is how many servings the package holds. The FDA notes that one package may contain more than one serving, so the numbers on the label may describe only part of the package unless a per-package column is also printed.
Where is the serving size on a nutrition label?
At the top, written as a household measure such as a cup, piece or slice, followed by the metric amount in grams. The FDA says it is not a recommendation of how much to eat or drink.
Does A1C appear on a food label?
No. A1C is the name of a blood test your care team may order and explain. It is not a nutrient and not a label term, and no package can tell you what your result means. Keep label practice and lab questions in separate notes.
General education only. This page helps you organize learning and questions. It is not medical advice and does not recommend a treatment, diet, medicine or blood-sugar target. Personal health decisions belong with your care team. Medical and educational disclaimer
Sources and editorial notes
- US Food and Drug Administration, Serving Size on the Nutrition Facts Label, retrieved October 18, 2026.
- US Food and Drug Administration, How to Understand and Use the Nutrition Facts Label, retrieved October 18, 2026.
- US Food and Drug Administration, Illegally Sold Diabetes Treatments, retrieved October 18, 2026.
- MedlinePlus, Prediabetes, retrieved October 18, 2026.
Examples are illustrative and the practice label is fictional. This page explains how to read label terms; it does not interpret anyone's test results. Not yet reviewed by a clinician. See our Editorial Policy, Review Methodology and Affiliate Disclosure.
Keep learning, one step at a time.
Net Carbs Is Not a Label Term
Why the phrase has no FDA definition, and what to check instead.
Food-Label Numbers Start With the Units
Weight, volume and serving information on a label.
Source Credibility Checklist
Check who wrote a claim and what supports it. Free online or as a PDF.
Start with one useful question.
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