I was helping a mother with an infant dx with GERD.  She was using a product called "simply thick" to add to EBM.

http://www.simplythick.com/

Unlike the other product that someone mentioned with specific instructions about breastmilk, I don't think this one has that much detail; however; working with her doctor, I believe this mother had success with her baby tolerating the thickened EBM using this product.  As with the other poster, I have no vested interested in this company.  I'm just passing along information that might be helpful.

Margo 
Breastfeeding Counsellor
Breastfeeding help is an e-mail or phonecall away!

Please obtain my permission before forwarding this post in whole or in part to anyone other than the person/people to whom it was originally sent.

             ***********************************************

Archives: http://community.lsoft.com/archives/LACTNET.html
To reach list owners: [log in to unmask]
Mail all list management commands to: [log in to unmask]
COMMANDS:
1. To temporarily stop your subscription write in the body of an email: set lactnet nomail
2. To start it again: set lactnet mail
3. To unsubscribe: unsubscribe lactnet
4. To get a comprehensive list of rules and directions: get lactnet welcome