DIETARY CARVACROL LOWERS BODY WEIGHT GAIN BUT IMPROVES FEED CONVERSION IN FEMALE BROILER CHICKENS
By Kyung-Woo Lee, H. Everts, .. H.J.Kappert, K.-H. Yeom, A. Beynen. 2003
290 citations recorded by the source corpus.
SUMMARY Dietary thymol, and its isomer, carvacrol, were evaluated as alternatives to antibiotic feed additives in female broiler chickens. In addition, the alleged hypocholesterolemic effect of carvacrol and thymol were tested when the chickens were fed cholesterol-free or cholesterol-containing diets. The experiment had a 2 × 3 factorial arrangement of treatments with diets containing two levels of cholesterol (0 or 1%) and without feed additive or with 200 ppm thymol or carvacrol. Dietary carvacrol lowered feed intake and weight gain but also lowered the feed-to-gain ratio. Dietary thymol, an isomer of carvacrol, did not affect growth performance. Dietary cholesterol significantly increased plasma and liver cholesterol concentrations. Carvacrol lowered plasma triglyceride concentrations but did not affect plasma cholesterol. It is concluded that thymol and its isomer, carvacrol, have different effects on growth performance and triglyceride metabolism in broiler chickens. The two compounds did not have hypocholesterolemic activity, irrespective of whether the diet was cholesterol free or cholesterol rich.
Subfields: Animal Science and Zoology, Food Science, Pharmacology
View Paper: https://www.semanticscholar.org/paper/bcd1f062de8a1ad54de28e11b68fd273f51170b4
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Citations in the corpus
- Effect of a herbal essential oil mixture on growth and internal organ weight of broilers from young and old breeder flocks (2006, result): “Our findings on feed intake and feed conversion are also in agreement with those of Lee et al. (2003) who studied carvacrol from oregano, those of Madrid et al. (2003) who studied the effect of plant extract and those of Alcicek et al. (2004) who used 48 mg/kg of an essential oil mixture in the…”
- Biological Effects and Modes of Action of Carvacrol in Animal and Poultry Production and Health - A Review (2015, background): “Lee et al. (2003a) reported that increased efficiency of feed utilization could be the explanation of thymol and carvacrol effects on performance.”
- Performance, immunity, serum biochemical and hematological parameters in broiler chicks fed dietary thyme as alternative for an antibiotic growth promoter (2010, unknown): “But more compatible to our results Lee et al. (2003b) indicated that dietary carvacrol, and not thymol, reduces plasma triglycerides and phospholipids and suggested that carvacrol may have more impact on lipogenesis than on cholesterol biosynthesis.”
- The effect of herbs and their associated essential oils on performance, dietary digestibility and gut microflora in chickens from 7 to 28 days of age (2007, background): “It is concluded that responses to phytochemicals may be greater in a more challenging environment, in agreement with Lee et al. (2003a).”
- Effect of Formic Acid and Plant Extracts on Growth, Nutrient Digestibility, Intestine Mucosa Morphology, and Meat Yield of Broilers (2007, methodology): “[33] found that dietary carvacrol and thymol at a concentration of 200 ppm lowered BWG and feed intake but improved FCR when female broilers were fed the respective diet for 4 wk.”
- Effect of Strain, Type of Natural Antioxidant and Sulphate Ion on Productive, Physiological and Hatching Performance of Native Laying Hens (2007, background): “lipids. Lee et al. (2003) , found that dietary carvacrol (the It was observed that there were significant differences compound presence in thyme) significantly lowered between different treatments on liver weight % (Table 5). plasma triglycerides and phospholipids by 12 and 7%, The addition of thym”
- Effect of Natural Antioxidant on Oxidative Stability of Eggs and Productive and Reproductive Performance of Laying Hens (2008, background): “Lee et al. (2003) found that dietary carvacrol significantly lowered plasma triglyceride and phospholipids by 12 and 7%, respectively and indicating that dietary carvacrol, but not thymol may have Some Constituents of Egg Yolk Extract: The data in Table 8 indicated that there were insignificant…”
- Effect of the Three Herbal Extracts on Growth Performance, Immune System, Blood Factors and Intestinal Selected Bacterial Population in Broiler Chickens (2011, result): “This finding is in agreement with results of Lee et al. (2003) and Ocak et al. (2008) who reported that use of 2% thyme supplement could significantly improve the growth of broilers.”