I'm thinking amino acids are just protein broken down to smaller particles. I suspect if your hair can't tolerate silk protein then it won't tolerate the silk amino acids either.
As far as i have been able to determine, my hair doesn't like any proteins. I use aloe once a week as a strengthening treatment. My hair likes it, but I still have to use it judiciously and follow with a good conditioning treatment.
A poster above mentioned that fine hair doesn't always like protein...my pet peeve is the misconception that low-porosity hair always does. My low-po hair begs to differ!! Reputable websites can't agree on the porosity/protein thing and I see quite a mix on here of different porosity/protein combo hair. Personally, I don't think porosity has much to do with it.
remember, with all advice or suggestions for your hair, YMMV!!
2b wavy, medium texture, low porosity, med-high density. Protein finicky.
Cleansing: DCNP, every 4-5 days (occasionally use CJ cleansers).
RO: CJSC, occasionally use JCDC
LI: KCKT or CJSL
Gel: KCCC, CJCIAB for 2nd day hair (sometimes third)
Heat is my friend: warm water rinses, steam caps, and diffuse dry. I love CLU cloths and my Denman.