plain igf-1 lasts about 20mins in your body. igf-1 r3 lasts 12hours I believe. r3 is better. Go to the igf section and read the sticky on it, it should tell you what you need to know. Invalid Link Removed
Only thing to know about the sticky is you can buy igf-1 r3 in constituted form now a days. They have ways to keep it good, so that part is old and not updated yet in the sticky. Good luck researching.
