Moisture would still be the way to correct protein overload- the balance between the two is a challenge for many of us, even after a year of CG I still struggle with getting the right balance.
Protein sensitivities tend to be very individual. Some people can tolerate certain proteins but not others. Some people tolerate protein only in certain circumstances- some can only do PTs and can't tolerate products, while others can use protein in products but can't tolerate a full DT.
As far as products, I can give some ideas, but you would have to verify the ingredients to see if there are additional proteins listed (I'm not really used to looking at proteins with that much detail because my hair has such a strong like of proteins). Keep in mind that regular conditioners can also be used as leave-ins. Mill Creek Botanicals and Renpure Organics both have Keratin conditioners- I'm not sure if there are additional proteins in them or not. Curly Hair Solutions has a conditioner called Pure Silk Protein, CHI makes LI sprays- there's a keratin spray and the one for curly hair uses silk amino acids. If I think of any others I'll add them.
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