You may want to follow a similar discussion on MUAC increasing under "severe malnutrition" topic at this link http://www.en-net.org.uk/question/602.aspx

Thanks a lot. According Mark Myatt's 'Does MUAC respond to treatment' can i say that in SFP MUAC increasing trend is 0.4 mm/day?

Sorry for writing 0.4mm/day. It will be 0.25 to 0.50 mm/day. My question was that ' if children are admitted in SFP program with MUAC 110-124 mm, then what will be the MUAC gain per day'. Is any document related with this question?

It will (I think) be somewhere in the lower end of that range. Why not collect the data and let us know?