Weekend Read · Week 3 · 10 min read · Reviewed against peer-reviewed evidence, October 2026
The short version
If you've found sugar in places you never expected, that isn't a failure of attention. It's how the food supply is built. In one large study of US supermarket purchases, three in every four packaged foods contained a sweetener. Sugar goes into savoury food too, under dozens of names, and the front of the pack is designed to sell, not to inform.
This week the food rules stay the same as Week 2. What's new is a skill: turn the pack over, read the ingredients list, then the panel. Two minutes per product, once, and you'll know your regular shop for good.
It's not you. It's the packaging.
By now most people in the program have had the moment. You check a jar of pasta sauce or a "wholegrain" cracker, and there it is: sugar. The usual reaction is a small wave of guilt. How did I not know?
Honestly, you weren't meant to. Researchers at the University of North Carolina matched the ingredients lists of more than 85,000 packaged foods to what US households bought over five years. Three-quarters contained a sweetener of some kind. The most common was corn syrup, and fruit juice concentrate made the top five (Ng et al., 2012). That's American data, but the same global brands and techniques fill shelves in Australia, New Zealand, the UK and Canada.
A second US study found ultra-processed foods made up just under 58% of what people ate, but supplied almost 90% of their added sugar (Martínez Steele et al., 2016). Most added sugar isn't spooned in at home. It arrives already inside the packet.
Why sugar ends up in savoury food
Sugar does a lot of jobs for a manufacturer beyond sweetness. It softens the sharpness of tomatoes and vinegar, so it turns up in pasta sauces, relishes and dressings. It helps bread brown and stay soft. It adds body when fat is taken out, which is why "light" versions often carry more. It rounds off salt and spice in stock, curry pastes and flavoured crackers. And it's cheap.
None of that makes these foods dangerous. It just means you can't tell from the type of food, or how sweet it tastes, whether sugar is in it. The only reliable way to know is to read.
How to read a label in two minutes
Every country does labels a little differently, but the skill is the same. Start at the back, not the front.
1. Read the ingredients list first
Ingredients are listed by weight, from most to least. If sugar, under any name, is in the first three, it's a major part of the food. Also watch for several different sugars: three small ones push each further down the list, even when the total is high.
2. Then check the sugars figure
A useful rule of thumb: 4 g of sugar is about one teaspoon. A sauce with 12 g per serve has about three teaspoons in it.
Where you can, compare products per 100 g (or 100 mL), not per serve. Serving sizes are set by each manufacturer, so per 100 g is the only fair comparison.
3. Remember that some sugar is meant to be there
Plain milk lists sugars on the panel: cow's milk naturally contains around 4.8 g of lactose per 100 mL (National Dairy Council, Ireland). Plain natural yoghurt shows sugars for the same reason. That's not added sugar, and full-fat plain dairy is on your plan this week. It's why the ingredients list matters more than the number. If it says only milk and cultures, you're looking at lactose.
What the panel tells you depends on where you live
Your Week 3 downloads include a printable "Read the label" guide for your country. Here's the short version of each.
Australia and New Zealand
The nutrition information panel shows "sugars", and that number includes both natural and added sugar together. There's no separate line for added sugar. Food Standards Australia New Zealand (FSANZ) considered one for years, then abandoned the proposal in March 2026 (FSANZ, P1058). What is changing is the voluntary claims on the front. Under rules being phased in by the end of 2027, a "no added sugar" claim can't be used if the food contains added sugars or is above a set sugar level, and added sugars are defined to include honey, malt, syrups and concentrated fruit juice (FSANZ, P1062). For now, the ingredients list is still your best tool.
United Kingdom
The back-of-pack table shows "carbohydrate, of which sugars", which is total sugars, natural and added. Many packs also carry the voluntary traffic-light label on the front. For sugars, red means more than 22.5 g per 100 g and green means 5 g or less per 100 g. Anything in between is amber (NHS).
United States
The Nutrition Facts label shows total sugars, then a line reading "Includes Xg Added Sugars", the only one of the four to separate them. Added sugars also carry a % Daily Value, based on 50 g a day. As a guide, 5% DV or less is low and 20% DV or more is high (US FDA).
Canada
The Nutrition Facts table shows total sugars. The ingredients list now groups all the sugar-based ingredients together in brackets after the word "Sugars", so you can see them in one place, ranked by weight (CFIA). Since 1 January 2026, many prepackaged foods high in sugars, sodium or saturated fat must also carry a black-and-white magnifying-glass symbol on the front saying so (Health Canada, 2022).
The words on the front are marketing
"Natural." "Wholesome." "Lightly sweetened." "Made with real fruit." None of these tell you how much sugar is inside.
They work, though. Researchers at Oxford pooled experiments comparing the same product with and without a health-related claim. Overall, claims made people noticeably more likely to choose or eat it (Kaur et al., 2017). Most of these studies were in artificial settings, and real-world effects look smaller, but the direction is clear.
That's the health halo: one good-sounding feature makes the whole product seem healthier than it is. Granola, protein bars and flavoured yoghurts are classic examples. Treat the front of the pack as an advertisement and the back as the facts.
Ultra-processed food: what the research shows, and what it doesn't
The term comes from the NOVA system, developed at the University of São Paulo, which sorts foods by how much and why they've been processed rather than by nutrients. Ultra-processed foods are industrial formulations, usually refined substances plus additives you wouldn't find in a home kitchen. NOVA's practical test is a label test: if the ingredients list contains at least one thing like high-fructose corn syrup, hydrolysed protein, flavours, colours, emulsifiers, thickeners or sweeteners, the product counts as ultra-processed (Monteiro et al., 2019).
The biggest review so far
In 2024, a team led by Melissa Lane at Deakin University's Food & Mood Centre in Geelong published an umbrella review in the BMJ. It pulled together 45 pooled analyses covering almost 10 million people. Higher intake of ultra-processed food was linked with higher risk across 32 of the 45 health outcomes studied. The evidence was graded most convincing for links with dying of cardiovascular disease, type 2 diabetes, anxiety and common mental health conditions (Lane et al., 2024).
How much weight to put on it
Here's the honest part. Every study in that review was observational. People who eat more ultra-processed food tend to have worse health, but that doesn't show the food alone caused it. They may also sleep less, earn less or be under more stress. The authors rated most of the evidence as low or very low quality, and called for more research on how these foods might cause harm.
One tightly controlled experiment is worth knowing. US researchers housed 20 adults in a clinical research centre for four weeks: two weeks of ultra-processed meals, two of unprocessed meals matched for sugar, fat, fibre and salt, eating as much as they liked. On the ultra-processed fortnight, they ate considerably more (Hall et al., 2019). It's small and short, but it hints that something beyond sugar content may change how much we eat.
The fair summary: the pattern is consistent and worth acting on, the cause isn't proven, and NOVA has its critics. You don't need to fear every packet. You just need to know what's in the ones you buy most.
The evidence map
A snapshot of the studies behind this article. "Strong" means a systematic review or meta-analysis with a consistent result. "Moderate" means good-quality individual studies. "Emerging" means early or small studies.
| Theme | Study | Strength | Finding |
|---|---|---|---|
| Sweeteners in packaged food | Ng et al., 2012 | National data | 75% of 85,451 packaged foods bought by US households contained a sweetener. |
| Where added sugar comes from | Martínez Steele et al., 2016 | National data | Ultra-processed foods supplied almost 90% of added sugar in the US diet. |
| Health claims on packs | Kaur et al., 2017 | Moderate | Claims made people more likely to choose a product; mostly tested in artificial settings. |
| Ultra-processed food and health | Lane et al., 2024 | Moderate | Umbrella review of 45 pooled analyses: higher intake linked with 32 worse outcomes. All observational; most evidence graded low quality. |
| Ultra-processed food and intake | Hall et al., 2019 | Emerging | 20 adults ate more on an ultra-processed diet than on a matched unprocessed one. |
| Menopause and metabolism | Davis et al., 2023 | Moderate | The hormonal changes of menopause have mainly adverse effects on cardiometabolic health. |
Putting it to work this week
The food rules for Week 3 are the same as Week 2: no sugar, no sweeteners, no fruit apart from lemon and lime. Your meal plan already avoids hidden sugar, so this week is mostly about the products you bring into the house yourself.
Audit your regulars, not the whole supermarket
Most households buy the same 20 or 30 packaged things on repeat. Check those once and you're done. Start with stock, pasta sauce, curry paste, crackers, bread, dressings, mayonnaise and anything labelled "light".
Make one swap at the Sunday cook-up
The easiest way around a sugary sauce is to make a jar yourself. Olive oil, lemon juice, mustard and salt make a dressing that keeps all week. A batch of tomato sauce from tinned tomatoes, garlic and olive oil covers a lot of meals. One swap that sticks beats ten that don't.
Shop with the back of the pack
Comparing two products? Turn both over. Check the ingredients for sugar, then the per 100 g figure. Short on time, pick the shorter list of things you recognise. And keep up your 20-minute movement plan: a walk after dinner is a good place to let all this settle.
If you're in perimenopause or menopause
The hormonal changes of the menopause transition tend to work against cardiometabolic health, the system that covers your heart, blood vessels and blood sugar (Davis et al., 2023). That makes hidden sugar in everyday savoury food worth more attention in your 40s and 50s than it was at 30, simply because there's less margin.
Midlife is also often the busiest stretch of life, and packaged food is how a lot of us get through it. Label reading isn't about giving up convenience. It's about choosing convenience food that doesn't quietly add sugar to every meal. And while the evidence is observational, the Lane review found links between ultra-processed food and anxiety, sleep problems and depressive symptoms, all things many women notice more at this stage.
What this article isn't saying
- That every packaged food is bad. Tinned tomatoes, frozen vegetables and canned fish are processed, and useful.
- That ultra-processed food has been proven to cause disease. The evidence is consistent but observational.
- That you'll read every label forever. Once you know your regulars, it takes seconds.
- That the lactose in plain dairy is a problem. It isn't.
Common questions
Is there a "safe" number of grams to look for?
This week, the ingredients list is the test: if sugar under any name is in it, leave it on the shelf. Later on, the UK figure of 5 g or less per 100 g is a reasonable sign of a low-sugar food, remembering plain dairy will show some lactose.
Is "no added sugar" the same as low sugar?
No. It means sugar wasn't added as an ingredient, but the food may still be high in natural sugar, such as fruit juice or dried fruit. In Australia and New Zealand the rules for this claim are tightening, but the panel figure still tells you more than the claim.
I have diabetes. Should I be reading labels differently?
If your diabetes team taught you to read total carbohydrate, that still stands. Reading for hidden sugar sits alongside it. If you take insulin or medication that lowers blood sugar, keep monitoring as usual and talk to your GP or diabetes educator before big changes.
About this article
Written by the I Quit Sugar team for the 8-Week Program, and reviewed against the peer-reviewed sources listed below.
Not medical advice. This article is general education. It isn't a diagnosis or a substitute for advice from your own health professional. If you're managing a medical condition, are pregnant or breastfeeding, or take medication, speak with your doctor before making significant changes to how you eat.
References
- Ng SW, Slining MM, Popkin BM. Use of caloric and noncaloric sweeteners in US consumer packaged foods, 2005–2009. J Acad Nutr Diet. 2012;112(11):1828–34. DOI
- Martínez Steele E, Baraldi LG, Louzada ML, Moubarac JC, Mozaffarian D, Monteiro CA. Ultra-processed foods and added sugars in the US diet: evidence from a nationally representative cross-sectional study. BMJ Open. 2016;6(3):e009892. DOI
- National Dairy Council (Ireland). What is lactose? NDC
- Food Standards Australia New Zealand. Proposal P1058 – Nutrition labelling about added sugars (abandonment report, March 2026). FSANZ
- Food Standards Australia New Zealand. P1062 – Defining added sugars for claims. FSANZ
- NHS. Food labels. NHS
- US Food and Drug Administration. Added sugars on the Nutrition Facts label. FDA
- Canadian Food Inspection Agency. List of ingredients and allergens on food labels. CFIA
- Health Canada. Government of Canada unveils new front-of-package nutrition symbol. 2022. Health Canada
- Kaur A, Scarborough P, Rayner M. A systematic review, and meta-analyses, of the impact of health-related claims on dietary choices. Int J Behav Nutr Phys Act. 2017;14(1):93. DOI
- Monteiro CA, Cannon G, Levy RB, et al. Ultra-processed foods: what they are and how to identify them. Public Health Nutr. 2019;22(5):936–941. DOI
- Lane MM, Gamage E, Du S, et al. Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses. BMJ. 2024;384:e077310. DOI
- Hall KD, Ayuketah A, Brychta R, et al. Ultra-processed diets cause excess calorie intake and weight gain: an inpatient randomized controlled trial of ad libitum food intake. Cell Metab. 2019;30(1):67–77.e3. DOI
- Davis SR, Pinkerton J, Santoro N, Simoncini T. Menopause — biology, consequences, supportive care, and therapeutic options. Cell. 2023;186(19):4038–4058. DOI
