Yep, big time. I've tried three different TTA products, and by the second week of using each one, the itching drives me crazy (I tried three different products/formulations hoping that something other than the TTA was the cause, but I had no such luck). Each time, it started off in a localized area such as a spot near my clavicle, and after a few more days, it spread to other areas like my groin, which became unbearable.
I will say this - each of the products I used seems to work as advertised, but I can't use any of them anymore because of the allergic reaction, which continues for a few days even after I stop using. Until now, I've never had a severe reaction or allergy to any of the too-numerous-to-count supplements I've used, so it's really a bummer that a datgum fatty acid would lay me low!