1Dr. Dibyendu Kumar Dey, 2Dr. Nagesh Sonale.
1Executive Director, Immeureka Animal Health Pvt. Ltd.
2Techno-Commercial Manager, Immeureka Animal Health Pvt. Ltd.
1. Introduction: origin and persistence of the hormone myth
One of the most widespread misconceptions surrounding poultry meat and eggs is the belief that growth hormones are routinely used in the poultry meat and egg industry to increase body weight, accelerate growth, or enhance egg production. This misconception persists despite enormous scientific evidence and strict regulatory bans across major poultry-producing countries. Consumer perception studies conducted in Asia and Europe report that 70–90% of respondents believe hormones are added to broiler chickens and laying hens, often associating poultry meat and eggs with health risks such as early puberty, hormonal imbalance, and cancer (Karasu & Öztürk, 2021; Verbeke et al., 2010). Unfortunately, this misunderstanding is amplified by misleading media narratives and the misinterpretation of naturally occurring hormones present in all living organisms. Both chicken meat and eggs naturally contain trace levels of endogenous hormones, but these are produced by the birds themselves and are not the result of external hormone administration (Courtheyn et al., 2002).
This misinformation negatively impacts consumer trust, poultry farmers, and allied industries while diverting attention from genuine food safety issues such as nutrition, sustainability, and antimicrobial resistance. International authorities including the FAO, WHO, FDA, and European Commission have repeatedly clarified that neither broiler chickens nor laying hens are given growth or production hormones (FAO/WHO, 2011; FDA, 2023). Addressing this myth with evidence-based communication is essential for informed consumer choice and public confidence in the poultry meat & eggs.
2. Scientific reality: hormones are not used in poultry meat or egg production
From a biological, practical, and economic standpoint, the use of hormones in poultry
meat or egg production is neither effective nor feasible. Comprehensive scientific reviews confirm that no hormone products are approved or used in broiler chickens or commercial laying hens (Esquivel-Hernández et al., 2016). Unlike cattle, poultry have a very short production cycle, and their endocrine systems respond poorly to externally administered growth hormones. Experimental studies evaluating somatotropin and steroid hormones in
chickens have consistently shown no significant improvement in growth rate, feed efficiency, or egg production (Scanes, 2009). In laying hens, egg production is regulated by tightly controlled physiological mechanisms involving the hypothalamic–pituitary–gonadal axis, which cannot be manipulated safely or effectively through exogenous hormone supplementation (Johnson, 2015).
In this all controversy, even if protein-based hormones were administered, they would be degraded during digestion, making oral delivery ineffective, while injection is impractical in commercial systems housing thousands of birds (Esquivel-Hernández et al., 2016). Moreover, hormone compounds are expensive and incompatible with the low-margin economics of poultry and egg production. As a result, no scientifically rational or commercially viable pathway exists for hormone use in poultry sector.
2.1. Regulatory Prohibition of Hormone Use in Poultry Production
Regulatory agencies reinforce this reality. The U.S. FDA explicitly states that hormones are not permitted in poultry or egg production, and no hormone-based drugs are approved for laying hens (FDA, 2023). Similarly, the European Union banned growth hormones in food animals decades ago, with strict monitoring programs ensuring compliance (European Commission, 2018). These regulations apply equally to meat- and egg-producing birds.
3. Genetics, nutrition, and management: the true drivers of broiler growth and egg production
The enhanced productivity of today’s broilers and laying hens is the result of decades of systematic genetic selection, supported by precision‑based nutrition and advanced management practices, rather than hormone use. Early evidence for this genetic progress was demonstrated by Havenstein et al. (2003), who showed that modern broilers reach market weight nearly twice as fast as birds from the 1950s when fed the same diets, clearly confirming that genetics, not hormones driven growth improvements. Over successive generations, selective breeding programs have focused on birds with superior growth potential and efficient feed conversion ratio (FCR), enabling higher body weight gain from less feed consumption. Continued genetic selection has subsequently enhanced muscle fibre deposition efficiency, particularly in the breast muscle, leading to higher lean meat yield. These improvements are achieved using selection indices that integrate growth, efficiency, health, and welfare traits, ensuring sustainable productivity without compromising biological integrity (Havenstein et al., 2003; Zuidhof et al., 2014; Scanes, 2009).
Similarly, long‑term genetic selection has improved egg number, shell quality, and feed efficiency in laying hens, allowing modern layers to produce over 300 eggs per year without compromising health (Hunton, 2005). These genetic gains are supported by precision‑based nutrition, with carefully balanced diets optimizing growth, reproduction, and egg production (Leeson & Summers, 2001; Pattison et al., 2008). In parallel, advancements in housing systems, automation, biosecurity, and environmental management have further enhanced bird welfare and productivity, collectively explaining modern poultry performance without the use of hormones.
4. Hormones in poultry meat and eggs: scientific context and safety
All animals, including poultry and humans, naturally produce hormones such as oestrogen, progesterone, and testosterone as part of normal physiology. Consequently, trace amounts of these hormones are naturally present in chicken meat and eggs, but they are not added externally (Stephany, 2010). These levels are extremely low and biologically insignificant when consumed. The FAO/WHO Joint Expert Committee on Food Additives (JECFA), during its evaluations of residues in foods of animal origin, concluded that naturally occurring hormone residues pose no health risk to consumers, including children and adolescents (FAO/WHO, 2011).Therefore, claims linking poultry meat or eggs to hormonal disorders lack scientific validity. Misleading marketing terms such as “hormone-free chicken/eggs” can unintentionally reinforce public fear by implying that hormones are normally used, when in fact they are legally prohibited (Verbeke et al., 2010). Clear, science- based communication is essential to correct this misunderstanding.
5. Role of social media in misinformation influencing Consumers psyche and its impact on poultry industry
In recent years, the rapid growth of social media has enabled the spread of unverified and misleading information, often driven by poorly informed influencers or non-expert online sources seeking digital attention through fear-based and sensational claims. Many people are aware that anabolic steroids are used by humans for bodybuilding or rapid muscle growth, and this awareness has led some influencers to wrongly associate various steroid use with the fast growth of broiler chickens. This misinformation has significantly influenced consumers especially household women and mothers who are responsible for family meals and concerned about their children’s and family health, resulting in reduced broiler chicken consumption. In reality, broiler chickens are not grown using hormones or steroids. Their rapid growth is the result of decades of genetic selection, balanced and precise nutrition, and improved farm management practices. Thus, broiler growth is natural within genetic potential, not artificial or hormone-driven, underscoring the urgent need for science-based communication and digital literacy.
6. Conclusion: The belief that hormones are used in the poultry meat or egg industry is scientifically incorrect, biologically implausible, and legally prohibited. Modern poultry and egg production rely on genetics (Selective Breeding), precision nutrition, health management, and environmental control not artificial hormones. Regulatory agencies worldwide strictly enforce these standards, ensuring food safety and consumer protection (FDA, 2023; European Commission, 2018). Continuing to spread hormone-related myths distracts from real challenges such as antimicrobial resistance, climate resilience, and sustainable production systems (WHO, 2017). Scientists, veterinarians, medicos, poultry industry allied professional and media professionals have a shared responsibility to communicate evidence-based facts clearly, responsibly and aware to public about rumours and misconceptions. By communicating accurate, evidence‑based information, stakeholders can first ensure that consumers are properly informed, which in turn builds trust and credibility for producers. Consequently, dismissing hormone‑related myths across the poultry meat and egg industries is essential for protecting public health, strengthening food security, and maintaining confidence on poultry industry.