Allium sativum


Other Names:

Cultivated Garlic


  • Antiprotozoal
  • Antioxidant
  • Antibacterial
  • Anticoccidial
  • Anthelmintic
  • Snake-repellent
  • Rodent-repellent
  • Insect-repellent
Garlic (Allium sativum) is well known for its use as a spice and herbal medicine in humans for thousands of years. It contains many useful bioactive compounds such as alliin, diallylsulphides and allicin. Garlic has been shown to have anti-thrombotic activity, lower blood lipids, blood tension, antibacterial properties, potent inhibitor of food pathogens, and has cardio-protective effects. Specific applications include:
  • Snake-repellent: Garlic is said to contain chemicals which act as a natural snake repellent. Mix together half a dozen of crushed garlic cloves in with water to create a spray, to spray around the exterior of the area in which you want to repel snakes.
  • Prevention of Necrotic enteritis (NE): Adding 1.0 to 1.5 g/kg of garlic powder to your flock's diet may help in the prevention of Necrotic enteritis.
  • Control of Northern fowl mites: Spraying hens with a mixture of 10% garlic juice in water is a natural, effective way to decrease the presence of northern fowl mites in laying hens.
  • Control of Red Poultry Mites: Garlic extract is effective as a repellent against red mites, demonstrating a 96% success after two successive sprays.
  • Antihelmintic: Adding 2.5 mg/bird of garlic to the diet of chickens infected with Ascaridia galli (roundworms) can help reduce internal parasitic worm load.
  • Egg Quality Improvement: Supplementing laying hens' diets with 1-3% garlic powder is beneficial for egg quality.
  • Anticoccidial: Garlic powder may be beneficial for poultry suffering from Coccidiosis. It has been shown to help chickens fight off Eimeria.
  • Ascites: Adding 5 ug/kg garlic bulb into the diet of chickens may help prevent ascites syndrome in chickens.

Poultry Specific Studies

TypePlant PartDosageSpecific useResultsRef
Chickens0.5 g/kgheat stressaddition of the dietary supplements and their combinations, particularly, probiotic and citric acid combination can improve productive performance, and intestinal flora and histomorphometry of broilers exposed to cyclic heat stress.A Elbaz et al., 2021
Chickenspowder0.75 g/kg dietantioxidantimproved Red blood cells and hemoglobin, increased total protein, globulin, high-density lipoprotein, immunoglobulin M (IgM), and IgG, superoxide dismutase and total antioxidant capacity and lowered blood total cholesterol, low-density lipoprotein, aspartate-aminotransferase, and malondialdehyde.I Ismail et al., 2021
ChickensEO0.06 ml / L added to drinking wateranticoccidialContinuous feeding of different doses of natural garlic essential oil could significantly reduce the clinical symptoms, cecal lesions, the number of oocysts, but increase the weight of sick chickens, and effectively improve the intestinal functions.L Chang et al., 2021
Chicksextractantimicrobialthe chicks’ innate immune response was modulated via various mechanisms including phagocytosis augmentation, bactericidal activity enhancement and nitric oxide (NO) production reduction, together with triggering the IL-1?, IL-6 and IFN-? cytokines expression levelsR Rusli et al., 2022
Broilerspowder0.25-0.75 g/kg of dietantioxidanthad positive effects on performance traits and immunological, antioxidant and physiological status of broilers.IE Ismail et al., 2020
Broilers2.5 kg/ton of dietoverall healthincorporation of garlic powder in broiler diets as feed additive significantly enhanced growth, economic and productive performance of these chickens. Physiological measurements (body weight, weight gains, feed intake, feed conversion ratio, carcass weight and internal organs) showed better performance of garlic treated chickens compared with control group under same rearing system. The results similarly showed lower susceptibility to diseases and medicament treatment consequently; lower mortality rate compared to control groups. Furthermore, blood and meat analysis showed lower cholesterol, Triglyceride, LDL, and, HDL levels compared with control group. The study concluded that garlic could be effectively used in broilers feeding to replace antibiotic as a growth promoter.M Al-Massad et al., 2018
Broilersbulb extract5 g/kg of dietasciteshad a systemic anti-hypertensive effect and could decrease ascites incidence without impairing broiler chicken performance.S Varmaghany et al., 2015
Otheraqueous water extract200 mg/kg BW for 7 successive days in drinking waterantiprotozoalhad the highest antitrichomonal effect and shortened course of treatment of pigeons from 7 days in gr. III to 5 days.Seddiek, Sh A., et al., 2014
Broilersfermented powder1-4 g/kg dietantioxidantThe white blood cell (WBC) counts, lymphocyte and immunoglobulin G (IgG) was increased (P < 0.05) in response to FGP treatments. Broilers had lower (P < 0.05) total cholesterol, triglyceride, low-density lipoprotein (LDL) cholesterol and cortisol concentrations in blood when they were provided with FGP2 and FGP4 diets. FGP administration had no effect on growth performance but improved immunity and meat quality as well as decreased cholesterol and cortisol in blood.X Ao et al., 2011
Broilers5 to 7.5 g/kg feedAnticoccidialoocysts shedding, lesion score and histopathology of the small intestines improved.M Ali et al., 2018