Joanna O'Sullivan

Marketing & Communications Manager, Dietlicious

Graduate Diploma in Human Nutrition (Deakin University)

Joanna has been writing about nutrition, health and wellbeing for 10 years, eight of which have been with Dietlicious. She explores how everyday food choices shape long-term health outcomes, with a focus on practical, sustainable habits — nutrition, movement, sleep and lifestyle practices that work together — to help people reach their weight and health goals without extremes or quick fixes.

She originally trained in Economics before spending two decades in brand and product marketing, then returned to study nutrition — a shift driven by her own growing interest in food and health. She now combines both worlds, translating nutrition science into clear, achievable advice for real life.

Joanna loves nothing better than spending time in the kitchen. She strongly believes in the health benefits of cooking from scratch with fresh and nourishing ingredients. With three active teenagers and a hungry husband to feed, her home-cooked meals rarely last long. Like so many other time-poor mums, she knows that healthy eating should feel realistic, not restrictive.

What is Keto? Understanding the Keto Diet

Understanding the Keto Diet The ketogenic diet is a high fat, moderate protein, low carbohydrate diet that forces the body to burn fats rather than carbohydrates. Because of the low carb intake, your body goes into a metabolic state called ketosis. This is where the body produces small fuel molecules called ‘ketones’ from burning fat for ...

Food Swaps - Don’t be afraid to make the trade!

Learning the art of healthy food swaps is so important if you want to establish a healthy body weight and maintain it for life. Here we show you how. Firstly, what exactly do we mean by food swaps? Well, it’s simply choosing a more nutritious or lower calorie meal or snack option rather than going for the most tempting, heavily laden with fat ...

Plant Power: The benefits of eating a plant-based diet

Did you know that tennis champion Venus Williams is a vegan? We often associate sporting performance with a diet rich in animal meat proteins but now there are a number of high profile sports stars who are proving that plant-based diets can absolutely provide all the right fuel. In Venus’ case, she made the switch when she was diagnosed with an ...

Benefits of Physical Activity | Dietlicous Health Blog

Move it! The Benefits of Physical Activity

The benefits of physical activity extend far beyond simply managing your weight. Moving has been proven to improve a wide range of health markers both physically and mentally! How would you like to…..

Bedtime Blues? Tips on How to Sleep Better and Beat Insomnia

It’s vital to human health to get a calm and restful sleep and enough of it. Our body’s repair and rejuvenation depends on it. Scientific studies have shown that good sleep can help you be a healthier person, one who eats less and exercises more effectively. A restful slumber can also boost your mood and your overall ability to function. The ...

Clean out your pantry & stock up on the right stuff

Most of us have all the right intentions to eat healthy food but over time we get busy or lack inspiration and suddenly we realise that the ‘sometimes’ foods become more like the ‘everyday’ foods. If this sounds like you, then here’s some tips for getting the balance right again, but first – get your pantry organised.

Cold War - Fresh vs Frozen Food

Did you know that fresh produce begins to deteriorate and lose its nutritional value from the moment it’s harvested? Take spinach for example – a Science Direct study showed that after just one day in the fridge, 29% of its Vitamin C content was lost and after 7 days the losses had grown to a whopping 94%!