I see huge red flags with this study.
It isn't a study on people taking in those micronutrients, it's a study done on cells from dead rats in a lab. There is no way you can make conclusions on how this product would affect living humans.
And the 'conlusion' bit of the study does just that, basically promising that this will make a very large difference for diabetics of all types.
Then there is the 'introduction' part. Some of the information there is false, if they can't get the basics on different types of diabetes right, what else is wrong?
You might like to read about the Rath Institute.
https://en.wikipedia.org/wiki/Matthias_Rath
It's part of a vitamin selling company.
The researchers all work for this company. Follow the money.