Every drug has side effects.
One has to measure them against the benefits before deciding to take a drug. No one is going to force anyone to take a drug.
Currently, millions of diabetics worldwide use synthetic insulin to regulate their blood sugar levels. Synthetic insulin is made in both bacteria and yeast.
Animal Insulin is taken from the pancreases of animals, usually pigs (porcine or pork insulin) and cows (bovine or beef insulin).
The insulin is purified which reduces the chance of the insulin user developing a reaction to the insulin.
There are three types of insulin:
•Natural animal insulins – derived from pancreases of pigs or cattle
•Synthetic ‘human’ insulins – made in a laboratory by genetic modification
•Insulin analogues – the latest insulin made by genetically modifying GM ‘human’ insulin
As I noted earlier all medications have side effects so it's important for everyone to be their own advocate when it comes to making informed choices about which path they want to take.
Thankfully in the modern era we live in any layman can research their alternatives using Google and consulting with their doctor.