1. Weber CJ (1934) Isolation of glycocyamine from urine. Exp Biol Med 32:172–174
2. Davenport HW, Fisher RB, Wilhelmi AE (1938) The metabolism of creatine: the role of glycocyamine in creatine synthesis. Biochem J 32(2):262–270
3. Edison EE, Brosnan ME, Meyer C, Brosnan JT (2007) Creatine synthesis: production of guanidinoacetate by the rat and human kidney in vivo. Am J Physiol Renal Physiol 293(6):F1799–F1804
4. Tsubakihara Y, Suzuki A, Hayashi T, Shoji T, Togawa M, Okada N (1999) The effect of guanidinoacetic acid supplementation in patients with chronic renal failure. In: Mori A, Ishida M, Clark JF (eds) Guanidino compounds in biology and medicine, vol 5. Blackwell Science Asia, Tokyo, pp 139–144
5. Ostojic SM, Stojanovic MD, Hoffman JR (2015) Six-week oral guanidinoacetic acid administration improves muscular performance in healthy volunteers. J Investig Med. doi: 10.1097/JIM.0000000000000212