An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Freudenberg A, Petzke KJ, Klaus S.Freudenberg A, et al. Among authors: petzke kj.Amino Acids. 2013 Feb;44(2):519-28. doi: 10.1007/s00726-012-1363-2. Epub 2012 Jul 31.Amino Acids. 2013.PMID: 22847780
Petzke KJ, Friedrich M, Metges CC, Klaus S.Petzke KJ, et al.Eur J Nutr. 2005 Oct;44(7):414-21. doi: 10.1007/s00394-004-0545-4. Epub 2004 Dec 28.Eur J Nutr. 2005.PMID: 15602629