Will silicone butt injections affect a person with diabetes on insulin?

This is a bad idea and it is not supported by the ASPS.  Diabetic or not, it should not be done.  This technique is not safe, nor has it been accepted by our plastic surgery community.  It is a technique that you'll hear about in other countries but not in the society of plastic surgeons.

best of luck

I do not recommend silicone butt injections to anyone. 

For butt augmentation there are better and safer options including fat injections or silicone butt implants. 

I would not consider silicone injections.   As a diabetic patient, you are likely to have issues related to infection and rejection of the material.   Silicone injections are quite simply obsolete because they carry such a high risk of complication.

I would recommend that you consider fat injections to your buttocks.   You are less likely to have infection or rejection of your tissue.