isn't a GDA. It's described on Usplabsdirect as a "Selective Insulin Muscle Sensitizer". Are you taking your doses far enough apart from when you last ate a meal?. I was told to wait at least 45 minutes after your last meal to take a dose. I would think the amount of bloat you get from a meal would depend on the type of food you are eating. It could be that in the last few weeks you may have intentionally or otherwise started eating something more "gassy" than what you have been eating normal. The way your body reacts to the food you eat while using will be different depending on glycemic index, glycemic load, and numerous other factors. You should examine your diet and timing of food intake, but just because you are getting bloated does not mean that is not doing its job.
Not sure how well I answered, but I'm sure Distilled Water or a Usp Labs rep can help you more than I.