AI-generated meal plans for teenagers who ask to lose weight routinely recommend dangerously low calorie targets. One chatbot told a 15-year-old boy asking how to lose weight that he should eat about 1,500 calories per day — barely half of his actual daily energy needs of approximately 2,800 calories. The plans also had severely imbalanced macronutrients, with protein, fat, and carbohydrate ratios that didn't meet basic nutritional guidelines for adolescents. The AI does not account for growth spurts, physical activity levels, or the unique metabolic demands of teenage bodies.
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AI chatbots are giving dangerously low calorie recommendations to teenagers who ask about weight loss — and the consequences could be severe. A study published in Frontiers in Nutrition found that AI-generated meal plans for adolescents contained an average of 700 fewer calories per day than what registered dietitians would recommend. In one case, an AI suggested approximately 1,500 calories/day for a 15-year-old boy whose actual daily energy requirement is roughly 2,800 calories. Dr. Jason Nagata, a pediatrician at UCSF who specializes in adolescent eating disorders, warned: "Inadequate nutrition can stunt growth, lead to hospitalization or significant medical interventions." He noted that AI "doesn't really critically think" — it just gives you what you request without providing broader context. The study, led by Dr. Ayşe Betül Bilen at Istanbul Atlas University, also found AI plans had significantly imbalanced protein, fat, and carbohydrate ratios. This is especially concerning because nearly two-thirds of teenagers now use AI chatbots, and about 30% use them daily. "AI platforms should not replace professional guidance — especially for children and adolescents whose nutritional needs are unique," Dr. Bilen said. Teens and parents should consult a registered dietitian or pediatrician for safe, personalized nutrition guidance.
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