Economic Implications of Curcuma Longa Supplementation on The Morphometric Development of Organs in Laying Hens: A Review

Abstract

The search for sustainable alternatives to antibiotic growth promoters has driven interest in phytogenic feed additives such as Curcuma longa (turmeric), known for its antioxidant, anti-inflammatory, and hepatoprotective properties. This review aims to evaluate the effects of dietary Curcuma longa supplementation on the morphometric development of internal organs in laying hens, and to analyze the potential economic implications of these physiological changes. A narrative synthesis was conducted using peer-reviewed in vivo studies published between 2000 and 2024 in English or Spanish. Selected studies reported quantitative data on organ morphometry (e.g., weight, length, or volume), included control and treated groups, and applied statistical analysis. The organs assessed included liver, spleen, intestines, heart, ovaries, and oviduct.  Findings show that moderate inclusion levels of turmeric (1–2 g/kg feed) can induce positive morphological changes, such as increased relative weights of liver and spleen, improved intestinal villus height and crypt architecture, and in some cases, enhanced development of the reproductive tract. These effects were associated with elevated antioxidant enzyme activity (e.g., SOD, CAT) and reduced levels of pro-inflammatory cytokines (e.g., TNF-α, IL-6), contributing to better nutrient absorption, immune response, and overall physiological resilience. Economically, improved organ function may translate into enhanced feed conversion efficiency, reduced veterinary interventions, and greater production consistency. However, heterogeneity in experimental design, dosages, and turmeric formulations limits comparability across studies. Further standardized and long-term research is needed to define optimal supplementation strategies and assess cost-effectiveness under commercial conditions.

Overall, Curcuma longa represents a promising phytogenic additive with the potential to support both physiological health and economic sustainability in laying hen production systems.