Archives

Dietary GAA and growth in lambs

Guanidinoacetic acid (GAA) is the only precursor for the creatine synthesis of vertebrates. Creatine (Cr) and phosphocreatine (PCr) are able to provide energy for the rapid growth and development of the muscle tissue. This study evaluated the effects of dietary different levels GAA on growth performance, GAA absorption and creatine metabolism of lambs. Twenty-four 3-month-old […]

Read More

GAA and creatine nitrate for energy status

This study aimed to evaluate the effects of dietary creatine nitrate (CrN) on growth performance, meat quality, energy status, glycolysis, and related gene expression of liver kinase B1/AMP-activated protein kinase (LKB1/AMPK) pathway in Pectoralis major (PM) muscle of broilers. A total of 240 male Arbor Acres broilers (28-day-old) were randomly allocated to one of 5 […]

Read More

GAA as a partial replacement to arginine

Guanidinoacetic acid is the direct precursor of creatine and can spare arginine (Arg) for creatine synthesis in low crude protein broiler diets. This study aimed to determine the extent GAA could spare Arg in broilers offered low crude protein diets and if supplemental betaine provides additional benefits. Seven hundred twenty-day-old Ross 308 male broilers were […]

Read More

GAA can compensate for low dietary energy

This study compared the responses of broilers to diets supplemented with the same level of guanidinoacetic acid (GAA) but formulated to have different N-corrected apparent metabolisable energy (AMEn) contents. The study involved 1280, one-day-old Ross 308 broilers, in 64 pens comprising 32 pens of males and 32 pens females, (20 birds in each) aged from […]

Read More

GAA supplementation and nitrogen retention

Creatine stores high-energy phosphate bonds in muscle and is synthesized in the liver through methylation of guanidinoacetic acid (GAA). Supplementation of GAA may therefore increase methyl group requirements, and this may affect methyl group utilization. Our experiment evaluated the metabolic responses of growing cattle to postruminal supplementation of GAA, in a model where methionine (Met) […]

Read More

GAA and betaine for growth performance

This study evaluated the influences of guanidinoacetic acid (GAA) and betaine (BT) on growth performance, nutrient digestion and ruminal fermentation in bulls. Forty-four Angus bulls were blocked by live body weight and then randomly divided into four groups in a 2 × 2 factorial design. Betaine of 0 or 0.6 g/kg dry matter (DM) was […]

Read More

Muscle GAA after creatine supplementation

Diets with six levels of creatine were hand-fed to juvenile Litopenaeus vannamei reared in freshwater for 46 days. Results showed creatine supplementation did not affect the growth performance (FBW: 17.04 ± 1.28 g) or the content of guanidinoacetic acid in muscle and hepatopancreas whereas significantly increased muscular creatine content. Diet with 8.28 g kg-1 creatine […]

Read More

Supplemental GAA or creatine spare arginine

Suckling piglets synthesize most of their creatine requirement, which consumes substantial amounts of arginine in order to synthesize guanidinoacetic acid (GAA) and methionine in order to transmethylate GAA to creatine. To determine whether supplemental GAA or creatine spare arginine and/or methionine for protein synthesis and, if GAA is supplemented, whether excess methionine is needed for […]

Read More

GAA protects against lactic acidemia

Increased blood lactic acid is likely to be involved in sudden death syndrome in broiler chicken. Guanidinoacetic acid with direct or indirect influence on the cardiovascular system may provide, to some degree, protection against lactic acidemia in birds. A total number of 144 male broiler chicks (Ross 308) were used in a complete randomised block […]

Read More

Various sources of arginine in low-protein chicken diets

Arginine activity in broiler diets can be supplied by L-arginine, GAA and L-citrulline, commercially available products. This study was conducted to assess the effects of Arg source and level on broiler performance, nutrient digestibility and carcass parameters. Day-old Ross 308 cockerels (n = 768) were assigned to one of eight dietary treatments using a completely […]

Read More