SOCIAL MEDIA DIETS MAY DERAIL WEIGHT LOSS AS EXPERTS URGE PERSONALISED CALORIE PLANS

More than half of social media users say they would change their diet based on content seen on platforms such as TikTok and Instagram, but health experts warn that following trending plans without considering individual needs can undermine long-term weight goals.

New analysis by telehealth provider ZAVA highlights how daily calorie requirements can vary significantly depending on lifestyle factors, even among people with similar physical characteristics.

Calorie needs differ more than many realise

Using a calorie-deficit calculator, researchers modelled a range of common lifestyle personas to demonstrate how energy requirements shift with activity levels.

For example, a 35-year-old sedentary male office worker measuring 178cm and weighing 90kg would require around 1,909 calories per day to reach a goal weight of 82kg.

However, a man of the same age, height and weight with a physically active job would need approximately 2,876 calories per day to achieve the same target.

The difference amounts to 967 calories each day, or about 6,769 calories per week.

A similar pattern was observed among female personas. A sedentary 29-year-old woman who is 165cm tall and weighs 72kg would require roughly 1,413 calories per day to reach a goal weight of 65kg.

An active woman with identical characteristics would need about 2,065 calories per day, resulting in a 652-calorie per day shortfall.

Across all profiles analysed, recommended calorie intake ranged from 1,413 to 2,876 calories per day, reinforcing the importance of tailoring nutrition plans to lifestyle demands.

Why trending diets may fall short

Dr Crystal Wyllie from ZAVA said the findings highlight the risks of adopting popular online diet trends without personalisation.

“With the internet and social media now becoming increasingly prolific with dieting trends and fads, more people than ever could be on the completely wrong diet or calorie intake for their needs and lifestyle.

One of the biggest misconceptions about weight loss is that there’s a single calorie amount or a one-size-fits-all approach that works for everyone.

In reality, our daily energy needs are characterised by far more than simply our height and weight; factors such as age, muscle mass, occupation, and overall daily activity levels play a vital role in ensuring you are following the best plan for your calorie needs.

“Our analysis and results show that two people who seem similar on paper can have maintenance calorie needs that differ by hundreds of calories per day, or thousands per week, due to their lifestyle differences.

If those individuals were to adopt the exact same diet they’ve both seen trending on social media, one might see progress or weight loss, while the other could feel fatigued, overly restricted, or see no results at all.

“Generic calorie targets and weight loss trends such as very low-calorie plans don’t account for specific lifestyles and requirements.

For someone with a very active job or high physical activity, those approaches may create a deficit that is overly aggressive and has negative effects.

For someone more sedentary, that same plan might not create the desired outcome or any outcomes at all.

“Sustainable weight loss begins with understanding your personal energy requirements. A tailored calorie target that reflects your daily lifestyle is far more likely to support healthy progress and long-term results rather than copying a recommendation from a trend online.”

A growing focus on realistic health goals

Health professionals say the popularity of social media-driven diet advice reflects a wider interest in weight management, but caution that sustainable outcomes are more likely when plans align with individual routines, preferences and activity levels.

As more Australians turn to online platforms for wellness inspiration, experts are encouraging a more personalised approach to nutrition, emphasising that effective weight management is rarely built on one-size-fits-all solutions.