High-temperature stress leads to a sharp decline in feed intake, clusters of weaned piglets experiencing diarrhea, and frequent tail-biting and fighting among livestock and poultry, which are persistent problems in large-scale pig and poultry farms. Many feed companies have tried various additives with little success. The root cause is the lack of functional ingredients that can address stress from a neural regulation perspective. Gamma-aminobutyric acid (GABA) from Jingjing Pharmaceutical is a natural functional amino acid that addresses these stress-related issues in a compliant manner. **I. What is Gamma-Aminobutyric Acid (GABA)?** 1. **Basic Physical and Chemical Properties:** GABA, with the chemical name 4-aminobutyric acid, has the molecular formula C4H9NO2 and a molecular weight of 103.12. It appears as a white or off-white crystalline powder, is easily soluble in water, and is non-optical. It is a feed additive allowed by national standards and does not belong to the category of antibiotics or hormones. 2. **Physiological Properties:** GABA is a non-protein amino acid that naturally occurs in organisms and is a key inhibitory neurotransmitter in the central nervous system of mammals. Animals can produce small amounts of GABA endogenously, but under conditions of high temperature, transportation, weaning, and high-density rearing, this production is insufficient, making external supplementation through diet necessary. **II. Mechanisms of Action of GABA** 1. **Neural Level:** GABA binds to receptors in the central nervous system, reducing the abnormal secretion of adrenaline and cortisol during stress, thereby alleviating symptoms such as restlessness, tail-biting, fighting, and stress-induced damage. 2. **Feed Intake Regulation:** GABA activates pathways in the hypothalamus that regulate appetite, enhancing feeding signals and improving issues like anorexia and decreased feed intake during stressful periods. 3. **Gut and Immunity:** GABA regulates gut structure, promotes the development of intestinal villi, reduces the depth of intestinal crypts, and enhances the activity of digestive enzymes. It also increases the levels of antioxidants (SOD and GSH-Px) in the body, reducing oxidative damage caused by stress and alleviating immune suppression. **III. Key Points for Selecting Feed-Grade GABA Ingredients** Low-cost GABA on the market often has issues such as insufficient purity, incompatibility with ruminants, and unclear dosage recommendations. Jingjing Pharmaceutical offers high-purity, stable GABA ingredients, ruminant-specific products that can pass through the rumen, GABA compounds with anti-stress additives, and customized application services tailored to different species and stages of growth. These products are suitable for various types of livestock and poultry, including monogastric animals, ruminant cattle and sheep, and aquatic animals, making it convenient for feed companies to develop and verify their formulas.