“Synthesis, Characterization, and In vitro Studies of PLGA – PEG Nanoparticles for Oral Insulin Delivery” DOI: https://doi.org/10.1111/cbdd.13504 by Sara Hosseininasab, Roghiyeh Pashaei‐Asl, Amir Ahmad Khandaghi, Hamid Tayefi Nasrabadi, Kazem Nejati‐Koshki, Abolfazl Akbarzadeh, Sang Woo Joo, Younes Hanifehpour & Soodabeh Davaran. The above article, published online on 8 July 2014 in Wiley Online Library ( http://onlinelibrary.wiley.com ), has been retracted by agreement between the authors, the journal Editor in Chief David Selwood, and John Wiley and Sons Ltd. The retraction has been agreed due to serious errors having become apparent which impact on the overall conclusions. The authors apologize for any inconvenience the publication of this work may have caused readers. Reference Hosseininasab, S., Pashaei‐Asl, R., Khandaghi, A. A., Tayefi Nasrabadi, H., Nejati‐Koshki, K., Akbarzadeh, A. …, Davaran, S. (2014). Synthesis, Characterization, and In vitro Studies of PLGA – PEG Nanoparticles for Oral Insulin Delivery. Chem. Biol. Drug Des , 84 , 307‐315.