AI-Generated Diet Plans: A Potential Pitfall for Teenagers’ Health
Young Australians are increasingly turning to artificial intelligence (AI) for personalised advice on everything from homework to healthy eating. However, a recent study has flagged a significant concern: AI chatbots, when used to plan diets, may be leading teenagers to consume dangerously low levels of calories, essentially equivalent to skipping meals. This reliance on AI for nutritional guidance, particularly for weight management, could have serious implications for adolescent health and development.
The research, published in the esteemed journal Frontiers in Nutrition, highlights that AI-generated diet plans often fall short in providing adequate essential nutrients and overall calorie intake. This oversight poses a tangible risk to the well-being of teenagers during a crucial period of growth.
“Our analysis demonstrates that meal plans generated by AI models tend to significantly underestimate total energy and key nutrient intake when contrasted with guideline-based plans developed by a qualified dietitian,” explained Ayşe Betül Bilen, one of the study’s authors. “Adhering to such unbalanced or excessively restrictive meal plans during adolescence could negatively impact growth, metabolic health, and the development of healthy eating behaviours.”
How the Study Was Conducted
To investigate this issue, the researchers utilised several popular AI chatbot platforms, including free versions of ChatGPT 4, Gemini 2.5 Pro, Perplexity, Bing Chat-5GPT, and Claude 4.1. These AI models were tasked with creating three-day meal plans for four hypothetical 15-year-old adolescents. The profiles included a boy and a girl who were classified as overweight, and a boy and a girl who were classified as obese. Each AI was instructed to generate a plan consisting of three main meals and two snacks per day.
The AI-generated plans were then meticulously compared against meal plans meticulously crafted by a registered dietitian with specialised expertise in adolescent health conditions. This rigorous comparison allowed researchers to identify discrepancies and potential shortcomings in the AI’s nutritional recommendations.
Alarming Caloric Deficiencies
The findings were stark. On average, the AI models calculated the daily energy requirements for the teenagers to be nearly 700 calories lower than the dietitian’s assessment. This substantial deficit is equivalent to an entire meal and, according to scientists, is large enough to trigger significant clinical consequences.
Beyond the overall caloric intake, the study also identified issues with the balance of macronutrients. While the total calorie count was severely underestimated, the intake of certain macronutrients was, conversely, overestimated.
“AI-generated diet plans consistently deviated from the recommended macronutrient balance, which is particularly problematic for adolescents,” warned Dr Bilen.
Macronutrient Imbalances Revealed
Specifically, the AI models recommended a higher protein intake, exceeding the dietitian’s recommendation by approximately 20 grams. Conversely, the suggested intake of carbohydrates was significantly lower, with an average difference of around 115 grams. This translates to carbohydrate intake making up only 32-36 per cent of the total energy in AI diet plans, a considerable drop from the recommended 45-50 per cent.
“Our findings suggest that these AI models may be relying on generalised or popular diet trends rather than fully integrating the specific nutritional requirements of adolescents,” stated Dr Bilen.
Potential Risks for Adolescent Development
The researchers are hopeful that these findings will serve to elevate public awareness regarding the limitations of current AI models in developing nutritionally sound and balanced meal plans, especially for vulnerable populations like teenagers.
“Adolescence represents a critical period for physical growth, the development of bone density, and cognitive maturation,” Dr Bilen emphasised. “A consistent deficiency in energy and carbohydrate intake, coupled with an imbalanced ratio of increased protein and fat, could pose significant risks during this crucial growth phase.”
The study underscores the importance of professional guidance from qualified health professionals when it comes to dietary planning, particularly for young individuals navigating the complexities of growth and development. While AI offers convenience and personalised suggestions, it is not yet a substitute for expert human oversight in matters of health.
