Ultra-Processed Foods:Is Convenience Costing You More Than You Think?

When it comes to food, convenience can be incredibly appealing.

Our lives are busy, and foods that are quick to prepare, easy to store and ready to eat can make life much simpler. But with the increasing availability of highly processed and packaged foods, it is worth taking a closer look at what makes up a large part of our modern diet.

In Australia, ultra-processed foods (UPFs) are estimated to contribute a substantial proportion of dietary energy intake. These foods are generally industrial formulations made using a combination of ingredients, some of which are not typically used in home cooking.

They are often designed to be particularly appealing through their combination of sweetness, saltiness, fat, flavour, colour and texture.

The question isn't whether you should never eat these foods. Rather, it's worth asking:

Could eating fewer ultra-processed foods and more whole or minimally processed foods support your health as you move through midlife and beyond?

What exactly is an ultra-processed food?

Processing food is nothing new.

For thousands of years, humans have cooked, fermented, dried, ground, frozen and preserved food. These traditional methods can make food safer, extend its shelf life and, in some cases, improve its digestibility or nutritional value.

Ultra-processing is different.

The term ultra-processed food comes from the NOVA food classification system, which categorises foods according to the extent and purpose of processing.

Ultra-processed foods are generally industrial formulations made from multiple ingredients and often include substances such as flavourings, colourings, emulsifiers, sweeteners or other additives designed to enhance the taste, texture, appearance or shelf life of the product.

Some common examples include:

• Soft drinks and other sugary drinks

• Confectionery and lollies

• Many packaged snack foods

• Sweetened breakfast cereals

• Some ready-to-eat meals

• Fast foods

• Processed meats

• Many commercially baked products

• Some flavoured yoghurts and desserts

• Products containing artificial or non-sugar sweeteners

• Some highly processed sauces and condiments

Not every packaged food is ultra-processed, and processing itself isn't necessarily a problem. The distinction is important.

For example, frozen vegetables, plain yoghurt, canned legumes and minimally processed wholegrain foods can all be convenient, nutritious choices.

The potential cost of convenience

There is growing research investigating associations between higher consumption of ultra-processed foods and a range of health outcomes.

Large observational studies have reported associations between higher UPF intake and an increased likelihood of conditions including obesity, cardiovascular disease and metabolic disorders. Research is also investigating possible associations with sleep and mental wellbeing.

So what might explain the relationship?

Researchers are exploring several possibilities.

1. They can displace more nutritious foods

When highly processed foods make up a large proportion of the diet, there may be less room for vegetables, fruit, legumes, whole grains, nuts, seeds and other nutrient-rich foods.

This can mean lower intake of dietary fibre and a range of vitamins, minerals and naturally occurring plant compounds.

2. They can be very easy to overconsume

Many ultra-processed foods are energy-dense and highly palatable. Their combination of fat, sugar, salt and flavour can make them particularly easy to eat quickly and in larger quantities.

Some research suggests that people may consume more energy when eating diets high in ultra-processed foods compared with diets based predominantly on minimally processed foods.

This doesn't mean that every UPF causes overeating, but it is one reason researchers are interested in how these foods may influence appetite, eating behaviour and overall energy intake.

3. They often contain less dietary fibre

Fibre is important for digestive health and provides fuel for many of the beneficial microorganisms living in our gut.

Whole plant foods also provide a diverse range of naturally occurring compounds, including polyphenols, which are being investigated for their role in supporting overall health.

Replacing some of these foods with highly processed alternatives can reduce the overall diversity and nutritional quality of the diet.

4. Processing can change the structure of food

Processing can alter the physical structure or 'matrix' of food.

This can influence how quickly food is eaten and digested, as well as how it interacts with appetite and satiety.

Researchers are continuing to investigate how these changes may contribute to the effects associated with diets high in ultra-processed foods.

5. Some products contain numerous additives

Ultra-processed foods may contain ingredients such as emulsifiers, colourings, flavourings and non-sugar sweeteners.

Many of these ingredients are approved for use in foods, and their safety is assessed by food regulatory authorities.

However, researchers are continuing to investigate how combinations of additives and long-term dietary exposure may interact with the gut microbiome and other aspects of health.

This is particularly interesting when we consider the relationship between our diet and the trillions of microorganisms living within our digestive tract.

The Gut Microbiome Connection

If you've followed my work for a while, you'll know that gut health is one of the foundations of my approach to healthy ageing.

Our digestive tract is home to trillions of microorganisms, including bacteria, fungi and other microbes. Together with their genetic material and surrounding environment, these microorganisms form the gut microbiome.

The gut microbiome is involved in many aspects of human physiology, including digestion, metabolism and immune function, and there is growing interest in its relationship with the gut-brain and gut-hormone axes.

One of the most important influences on the gut microbiome is what we eat.

A diverse diet containing plenty of plant foods provides different types of dietary fibre and naturally occurring plant compounds that can support a diverse microbial ecosystem.

By contrast, a diet dominated by highly processed foods may provide less of this diversity.

What about emulsifiers and the gut?

This is an area of fascinating emerging research.

Some emulsifiers commonly used in processed foods, including substances such as polysorbate 80 and carboxymethyl cellulose, have been studied for their potential effects on the gut microbiome and intestinal barrier.

Animal and laboratory research has raised questions about whether some emulsifiers may influence the composition of gut microorganisms and inflammatory pathways.

However, it is important to distinguish this early research from established evidence in humans.

We don't yet have enough evidence to say that consuming a particular emulsifier will cause gut dysfunction or a chronic disease in an individual.

What we can say is that this research adds to the broader question of whether a diet heavily reliant on ultra-processed foods is the best foundation for long-term health.

And from a naturopathic perspective, I believe that focusing on the overall pattern of the diet is much more useful than becoming fearful of individual ingredients.

What about artificial and non-sugar sweeteners?

Non-sugar sweeteners are another area receiving considerable research attention.

Ingredients such as sucralose, aspartame, saccharin and acesulfame potassium are used in a variety of foods and beverages to provide sweetness with little or no energy.

Some research has investigated whether regular consumption of certain non-sugar sweeteners may influence the gut microbiome, glucose metabolism or appetite.

The findings are not yet consistent enough to suggest that all non-sugar sweeteners have the same effects, and individual responses may vary.

Again, the bigger picture matters.

If your diet contains a large amount of artificially sweetened drinks, confectionery or highly processed snack foods, it may be worth considering whether some of these foods could gradually be replaced with simpler, minimally processed alternatives.

Understanding the NOVA Food Classification System

The NOVA classification system groups foods according to their level and purpose of processing.

It can be a useful framework for understanding the difference between minimally processed foods, processed ingredients, processed foods and ultra-processed foods.

NOVA 1 – Unprocessed or minimally processed foods

These are foods that have undergone little alteration from their natural state, although they may have been washed, cleaned, dried, crushed, frozen, pasteurised or otherwise prepared.

Examples include:

• Vegetables and fruit

• Legumes

• Nuts and seeds

• Eggs

• Meat and fish

• Milk

• Plain yoghurt

• Rice and other grains

NOVA 2 – Processed culinary ingredients

These are ingredients generally obtained from foods in the first group and used to prepare and season meals.

Examples include:

• Olive oil and other vegetable oils

• Salt

• Sugar

• Honey

• Butter

NOVA 3 – Processed foods

These foods are generally made by combining foods from NOVA 1 with ingredients such as salt, sugar or oil.

Examples can include:

• Tinned vegetables

• Some breads

• Cheese

• Salted nuts

• Some traditionally prepared or cured foods

NOVA 4 – Ultra-processed foods

These are industrial formulations that typically contain multiple ingredients and may include substances or additives not commonly used in home cooking.

Examples can include:

• Soft drinks

• Packaged snack foods

• Confectionery

• Some sweetened breakfast cereals

• Some ready-to-eat meals

• Fast foods

• Processed meats

• Commercial baked goods

• Some flavoured desserts and yoghurts

• Products containing multiple additives, flavourings, colourings or sweeteners

One important point: NOVA is a classification system, not a simple measure of whether a food is 'good' or 'bad'.

A food's nutritional value still matters, and the overall pattern of your diet is far more important than whether you occasionally eat a particular packaged food.

So, What Should You Actually Eat?

This is where I think the conversation becomes much more useful.

Rather than creating another list of foods you shouldn't eat, try focusing on what you can add more of.

Build your meals around foods that are as close to their natural form as practical:

Vegetables and fruit

Aim for variety and include different colours throughout the week.

Whole grains and legumes

Foods such as oats, quinoa, brown rice, lentils and chickpeas can provide valuable dietary fibre.

Nuts and seeds

These provide healthy fats, protein, fibre and a range of micronutrients.

Quality protein sources

Include foods such as fish, eggs, legumes, poultry or other minimally processed protein sources that suit your dietary preferences.

Healthy fats

Extra virgin olive oil, avocado, nuts and seeds are examples of nutrient-rich sources of dietary fat.

Herbs, spices and plant foods

These add flavour while also providing a diverse range of naturally occurring plant compounds.

And perhaps most importantly, keep your approach realistic.

You don't need to eliminate every packaged food from your kitchen.

A tin of beans, frozen vegetables, plain yoghurt or a loaf of good-quality bread can make healthy eating much easier.

The goal isn't perfection.

It's about gradually shifting the balance of your diet towards foods that nourish you.

A Simple Midlife Food Philosophy

As women move through their 40s and beyond, nutrition becomes an important part of supporting healthy ageing.

Rather than constantly asking "What should I eliminate?", I encourage my clients to ask:

"What can I add to my diet that will nourish me today and support my health for the years ahead?"

• More vegetables.

• More fibre.

• More variety.

• More whole and minimally processed foods.

• More meals prepared at home when possible.

• And perhaps a little less reliance on foods designed primarily for convenience and hyper-palatability.

You don't have to change everything overnight.

Start with one meal, one snack or one shopping choice at a time.

Because healthy ageing isn't about being perfect.

It's about building strong foundations that you can sustain for the long term.

The information provided on this blog is intended for general knowledge and informational purposes only, and does not constitute medical advice. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider for any questions you may have regarding your health or treatment, and before making any decisions about your health or treatment. Reliance on the information provided on this blog is solely at your own risk.

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