I knew that many grains contain amino acids, so I did a search before I answered. Get the Facts on Flax
This article says yes. FSG is so simple to make (the straining is difficult, but it gets better as you get used to it), you really should try to make some. It really cheap, too. You can pick up some flax seeds at any health food store, or place that sells edibles by the pound.
You can add any ingredient you know your hair likes. If you make a little, and it works, you can go on from there.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me