My Sister-n-law told me about her long-since ex-husband; he was a body builder and took insulin presumably to build more mass. After taking insulin for a while when he tried to stop his pancreas no-longer produced insulin. I don't know the science behind this but from what I understand the bad decision spawned by his excessive ego gave him the same disease that most of us would give our left $#% to be rid of.
I could never understand how injecting insulin would create more body mass. I mean you have to eat sugar otherwise crash and well why not just eat sugar and let your pancreas do the rest.
Humulin R and Humulin N are deregulated in the US. You can buy them with no prescription in any pharmacy in the US. Animal insulins were deregulated too in the 90's but alas they are not made anymore.
I suggest you walk into an internal med doctor and tell him that you have sensitivity to recombinant DNA insulin and you would like him to write you a script for Porcine insulin. I doubt he would say no.
I was glad to go off Pork insulin because it made pork smell and taste awful.
I couldn't bare to smell bacon for years. Then magically after I switched, It began to smell good to me again, I pretty much don't eat pork anyway, but at least it doesn't irritate me like it used to.
I never tried beef insulin, so I don't know if that would put me off hamburgers or not. I suppose it is possible though.
More insulin = more fuel storage in shorter period of time. Also a none PWD has the ability to counter regulate excessive insulin so the impact of some extra insulin is not Hypoglycemia. Packing more sugar into the liver and body, and being able to burn it faster equals ,bigger, faster, and stronger longer.