Dr Nick Fuller
Leading Obesity Expert at the University of Sydney and founder of Interval Weight Loss.
Weight loss injections, such as GLP-1 medications, have gained attention for their ability to help manage weight and improve appetite control. But when it comes to teens, the conversation becomes far more complex. Adolescence is a period of rapid growth, hormonal changes, and developing habits—meaning any intervention must be carefully considered. While some teens with obesity and associated health risks may benefit from these medications, they are not a first-line solution, and long-term safety data in this age group remain limited. Research highlights that combining medical interventions with lifestyle changes is the safest and most effective approach for teens (Pediatrics, 2022; Journal of Clinical Endocrinology & Metabolism, 2023). In this article, we explore the circumstances in which weight loss injections may be appropriate, their potential benefits and drawbacks, and safer alternatives for sustainable teen health.
Is It Good for Teens to Use Weight Loss Injections
Weight loss injections are not automatically suitable for all teens. Their use should be highly selective and guided by qualified healthcare professionals. For most adolescents, lifestyle-based approaches like balanced nutrition, regular physical activity, and healthy routines remain the safest and most effective methods for managing weight. Medical interventions may only be considered when these strategies alone are insufficient, and the teen faces significant health risks.
In What Cases Should Teens Use Weight Loss Injections
Medical experts may consider weight loss injections for teens under very specific circumstances, such as:
When a teen has obesity along with conditions like type 2 diabetes, high blood pressure, or high cholesterol, medication may be considered to reduce long-term health risks.
If structured diet, activity, and behavioural interventions have not produced meaningful results, injections may be used as part of a broader treatment plan.
Teens with insulin resistance or metabolic syndrome may benefit from appetite-modulating medications to support metabolic health.
A paediatric endocrinologist or other specialist must carefully evaluate risks and benefits before prescribing weight loss injections.
Any teen using these medications requires regular follow-ups to ensure growth, nutrient intake, and emotional well-being are not compromised.
Benefits of Using Weight Loss Injections for Teens
When used appropriately under medical supervision, weight loss injections may provide benefits for certain teens, including:
Improved appetite regulation in specific cases – helping teens manage hunger and satiety more effectively.
Support for managing obesity-related health risks – reducing strain on cardiovascular and metabolic systems.
Possible improvement in blood sugar control – especially for those with insulin resistance or early type 2 diabetes.
Assistance when lifestyle changes are not enough – providing additional support alongside diet and exercise.
Potential motivation to adopt healthier habits – seeing results can reinforce positive lifestyle changes when guided by professionals.
Possible Drawbacks of Using Weight Loss Injections
Despite potential benefits, there are notable risks and limitations for teens:
Impact on normal growth and development – adolescence is a critical period for growth; appetite suppression may interfere.
Risk of nutrient deficiencies – reduced intake may lead to insufficient vitamins and minerals.
Gastrointestinal side effects – nausea, diarrhoea, or stomach discomfort can occur.
Emotional reliance on medication – teens may focus on quick fixes rather than sustainable behaviour change.
Limited long-term data in teens – most research is in adults, so long-term effects remain unclear.
Why Weight Loss Injections Are Not the First Option for Teens
Weight loss injections should only be considered after other strategies have been explored due to:
Developing bodies need balanced nutrition – teens require sufficient calories and nutrients for growth.
Lifestyle habits are still forming – adolescence is an ideal time to instil healthy routines that last a lifetime.
Emotional and mental health considerations – focusing on medication may create anxiety or body image issues.
Risk of focusing on quick fixes – relying on injections may undermine motivation for sustainable changes.
Long-term behaviour change is more sustainable – skills like cooking, planning meals, and enjoying exercise are lifelong tools.
Alternatives to Weight Loss Injections for Teens
Safe, evidence-based approaches often provide better long-term outcomes than medication:
Nutrition education focused on balanced meals – understanding macronutrients, portion sizes, and healthy eating.
Regular physical activity that feels enjoyable – sports, dance, or active hobbies rather than structured “exercise only.”
Strength-building and movement-based routines – resistance training supports healthy metabolism and body composition.
Sleep and daily routine improvement – consistent sleep helps regulate hunger and energy.
Stress management and emotional support – mindfulness, counselling, or relaxation strategies.
Family-based lifestyle changes – involving the household in healthy routines ensures better adherence.
Guidance from a registered dietitian – personalised support for nutrition and growth requirements.
Mental health and body image support – addressing self-esteem and relationship with food is essential for sustainability.
Conclusion
Weight loss injections may have a role for certain teens under strict medical supervision, particularly those with obesity and related health risks. However, they are not a first-line solution, and potential drawbacks—including impacts on growth, nutrition, and emotional health—must be carefully weighed. Safe, sustainable strategies centred on balanced nutrition, enjoyable activity, structured routines, and family support remain the foundation of teen weight management. When guided by healthcare professionals, these approaches offer the best chance for long-term health and wellbeing without relying on medication alone.
Dr Nick Fuller is the founder of Interval Weight Loss and is a leading obesity expert at the University of Sydney with a Ph.D. in Obesity Treatment. Dr Fuller is also the author of three best-selling books and his work been published in top ranked journals in the medical field, including JAMA, Lancet and American Journal of Clinical Nutrition.