Foods to Avoid for Better Health
- , by SANUSq Research team
- 9 min reading time
Eating well is as much about what you leave off your plate as what you pile on it — and when it comes to foods to avoid for better health, a surprisingly small group does most of the damage.
The real problem: ultra-processed foods
If there's one category worth cutting back on above all others, it's ultra-processed foods. These are industrial formulations built largely from refined ingredients, cheap fats, sugars, starches and additives — foods engineered in a factory rather than made in a kitchen. Think sugary soft drinks, packaged snacks and crisps, instant noodles and ready meals, mass-produced biscuits and pastries, sweetened breakfast cereals, and processed meats like sausages and deli slices. They're designed to be hyper-palatable, long-lasting and cheap, and they now make up a large share of the calories many people eat. If you want a shortlist of processed foods to avoid as everyday staples, that group covers most of it.
An umbrella review of dozens of meta-analyses found that higher consumption of ultra-processed foods was associated with increased risks of all-cause mortality, cardiovascular disease, type 2 diabetes and colorectal cancer, among other outcomes (ultra-processed food umbrella review, 2025).
The specific culprits within that category
Rather than memorising a long unhealthy foods list, it helps to know which ingredients do most of the harm, so you can spot them anywhere. Added sugar and sugary drinks are near the top of the list — a topic we cover in depth in the impact of too much sugar.
A large prospective study found that a higher percentage of daily calories from added sugar was associated with a significantly greater risk of death from cardiovascular disease (Yang et al., 2014).
Alongside sugar, the main offenders are refined carbohydrates (white bread, pastries and other foods that spike blood sugar), processed and cured meats, excess salt (much of it hidden inside packaged foods rather than added at the table), and industrially produced trans and heavily refined fats. Alcohol, in excess, belongs on the list too. None of these needs to be banned outright — but they're the things most worth reining in.
Why these foods cause trouble
Ultra-processed foods share a set of problems that go beyond any single nutrient. First, they're typically energy-dense but nutrient-poor: they pack in calories while crowding out the vegetables, fruit, whole grains, legumes and quality protein your body actually needs. Second, they're engineered to override your natural fullness signals — the precise combinations of sugar, fat, salt and texture are designed to make you eat more than you intended, which is why a packet of crisps disappears so easily. Third, the refined carbohydrates and sugars they contain drive sharp swings in blood sugar, and the overall pattern is linked to the low-grade, chronic inflammation that underlies so many long-term conditions. Fourth, they are usually low in fibre, which is one reason they pass through quickly and leave you hungry again sooner than a comparable whole-food meal would.
Put simply, it's not that one biscuit is dangerous — it's that a diet built largely on these foods gradually shifts the whole system in an unhealthy direction.
Not all processing is the enemy
It's worth keeping perspective here, because "processed" has become a scare word. Plenty of minimally processed foods are perfectly healthy: tinned beans and tomatoes, frozen vegetables and fruit, plain yoghurt, wholemeal flour, tofu and simple cheeses are all "processed" in some sense, yet they're genuinely good for you. The concern is specifically with ultra-processed foods — the ones with long ingredient lists full of refined components, additives and things you'd never find in a home kitchen. A useful rule of thumb: the shorter and more recognisable the ingredient list, the better. Where a food sits on that spectrum matters far more than whether the word "processed" appears on the packet at all.
The simple shift that matters most
You don't need a perfect diet or a long list of forbidden foods to eat well — and trying to be perfect often backfires. The single most effective move is to shift the overall balance of your plate towards whole, minimally processed foods, and to treat ultra-processed items as occasional rather than everyday. In practice that means cooking at home a little more often, keeping easy whole-food options within reach, reading labels when you shop, and making small, sustainable swaps — water or sparkling water instead of a sugary drink, fruit and nuts instead of a packaged snack, home-cooked instead of ready-made where you can. It's the pattern over weeks and months that shapes your health, not any single meal, and small changes genuinely add up. This is the same whole-food, plant-forward direction that underpins an anti-inflammatory diet.
Don't overlook what you drink
It's easy to focus on food and forget that a large share of the problem often arrives in a glass. Sugary soft drinks, energy drinks, sweetened coffees and even fruit juices can deliver a startling amount of sugar with almost no fullness in return — because liquid calories don't satisfy hunger the way solid food does, they tend to be added on top of everything else rather than displacing it. This makes sweet drinks one of the easiest wins in the whole picture: switching a daily sugary drink for water, sparkling water or unsweetened tea is a small change that removes a lot of sugar with very little effort. It is worth reading the label on smoothies, flavoured waters and sports drinks too, since several of them sit closer to a soft drink than the packaging suggests.
Alcohol deserves a mention here too. Beyond its own effects, it's calorie-dense and often paired with ultra-processed snacks, so cutting back tends to help on more than one front. None of this means drinks have to be joyless — it simply means making water your default and treating sweet or alcoholic drinks as the occasional exception rather than the everyday norm.
Frequently asked questions
What foods should I avoid for better health?
Mainly ultra-processed foods: sugary drinks, packaged snacks, instant meals, mass-produced baked goods, sweetened cereals and processed meats. Within these, the biggest culprits are added sugar, refined carbohydrates, excess salt and industrial trans and refined fats.
Why are ultra-processed foods bad for you?
They tend to be energy-dense but nutrient-poor, are engineered to be overeaten, and drive blood-sugar swings and chronic inflammation. Higher intake is linked with increased risks of mortality, heart disease, type 2 diabetes and some cancers.
Are all processed foods unhealthy?
No. Minimally processed foods like tinned beans, frozen vegetables, plain yoghurt and tofu are perfectly healthy. The concern is with ultra-processed foods that have long lists of refined ingredients and additives you wouldn't use at home.
How do I spot an ultra-processed food?
Check the label. A long list of unfamiliar ingredients, added sugars, refined oils, emulsifiers and additives is a giveaway. A short list of recognisable whole-food ingredients is a good sign. As a rule, the closer a food is to how it grew, the better.
Do I have to cut these foods out completely?
No — and aiming for perfection often backfires. It's the overall pattern that matters. Shift the balance of your plate towards whole foods, cook at home a little more, and enjoy ultra-processed treats occasionally rather than as everyday staples.
What should I eat instead?
Build meals around vegetables, fruit, whole grains, legumes, nuts, and good-quality protein, with water as your default drink. Simple home cooking using recognisable ingredients is the most reliable way to eat well without overthinking it.
If I only change one thing, what should it be?
For most people the sweet drinks are the easiest first move, because they are simple to swap and deliver a lot of sugar for very little fullness. After that, cooking one or two more meals at home each week tends to displace the packaged options without any need for a rulebook.
References
- Barbaresko J, Bröder J, Conrad J, et al. Ultra-processed food consumption and human health: an umbrella review of systematic reviews with meta-analyses. Crit Rev Food Sci Nutr. 2025;65(11):1999–2007. PMID 38363072
- Yang Q, Zhang Z, Gregg EW, et al. Added sugar intake and cardiovascular diseases mortality among US adults. JAMA Intern Med. 2014;174(4):516–24. PMID 24493081
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The team at SANUSq.
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The health information in this article is provided for educational purposes only. Consult your healthcare professional before making any medical decisions.
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