How to Read a Food Label When You Have Diabetes
Packaged food labels are designed to be reassuring rather than informative. If you are managing blood sugar, a few habits turn the label into something genuinely useful.
Start with the serving size, not the nutrients
Everything on the panel refers to one serving, and manufacturers choose that serving. A biscuit pack may list values for three biscuits while the sleeve holds fifteen. A beverage bottle may be labelled per 100 ml when the bottle holds 250 ml.
Before reading anything else, work out how many servings you will actually eat and multiply. This single step corrects most label misreadings.
Total carbohydrate matters more than sugar
Blood glucose responds to all digestible carbohydrate, not only to the sugar line. Refined wheat flour, rice flour, maida-based snacks, corn starch and maltodextrin all raise glucose, and some raise it faster than table sugar.
So read the total carbohydrate figure first. The sugar line is a subset of it, useful for judging quality but not for judging quantity.
Subtracting fibre
Fibre is counted within total carbohydrate but is largely not absorbed. Many people use available carbohydrate, calculated as total carbohydrate minus dietary fibre, when estimating the glucose impact of a food.
For a product with 30 g total carbohydrate and 8 g fibre, the available carbohydrate is about 22 g. Fibre also slows absorption, so a high-fibre product with the same carbohydrate count produces a gentler rise.
Sugar alcohols such as maltitol, sorbitol and xylitol are a middle case. They raise glucose less than sugar but not to zero, and in quantity they cause bloating and loose stools.
Added sugar versus natural sugar
Indian labelling is moving towards declaring added sugars separately. Where the figure is available, use it. Plain milk and plain yoghurt contain natural lactose and no added sugar, whereas a flavoured version of the same product may carry 12 g or more per cup.
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Where added sugar is not listed, read the ingredients. Sugar appears under many names, and the trick is to split it across several so that none reaches the top of the list:
- Sucrose, glucose, dextrose, fructose, maltose
- Invert sugar, liquid glucose, glucose syrup, high fructose corn syrup
- Jaggery, honey, cane juice, molasses, date paste, fruit juice concentrate
- Maltodextrin, which behaves like a rapidly absorbed starch
Jaggery and honey are not metabolically superior to sugar in any meaningful amount, despite the marketing.
The ingredients list is ordered by weight
Ingredients appear in descending order. If refined flour, sugar or a sugar synonym occupies one of the first three positions, the product is largely that ingredient regardless of the front-of-pack claim.
Look for whole grain named explicitly, such as whole wheat flour or whole oats, rather than “wheat flour”, “multigrain” or “atta blend”, which often means mostly refined flour with a fraction of something else.
Claims that mean little
- Sugar free: may still be high in refined starch and fat. Sugar-free biscuits and rusks raise glucose substantially.
- No added sugar: may contain fruit concentrate, which is sugar.
- Diabetic friendly: not a regulated definition in most markets.
- Multigrain: several grains, any of them refined.
- Made with real fruit: any quantity, however small.
- Cholesterol free: meaningless in a plant product, which never had any.
- Natural: unregulated for most purposes.
Fat and sodium still count
Diabetes roughly doubles cardiovascular risk, so the saturated fat and sodium lines matter. Watch for palm oil and partially hydrogenated fat, and treat products above roughly 400-500 mg sodium per serving as high.
A quick reading order
- Servings per pack, and how many you will eat
- Total carbohydrate per serving, multiplied out
- Dietary fibre, subtracted
- Added sugar
- Saturated fat and sodium
- First four ingredients
Test rather than assume
Glycaemic response to a specific product varies between individuals. If you monitor, check your glucose about 90 minutes after a portion of a food you eat regularly. That personal number is more reliable than any general index.
Nutrition needs differ with medication, kidney function, weight goals and activity. Use this as a reading method and confirm targets with your doctor or a dietitian.