If it's due to its ability to reduce blood glucose levels, then berberine may be another way to get a similar effect.
Berberine stimulates glucose transport through a mechanism distinct from insulin
https://www.sciencedirect.com/science/article/pii/S002604950...
Efficacy of Berberine in Patients with Type 2 Diabetes
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2410097/
It also lowers cholesterol
Berberine is a novel cholesterol-lowering drug working through a unique mechanism distinct from statins
https://www.nature.com/articles/nm1135
But pure berberine is not well absorbed in the intestine, so you need to buy a good formation for it.
Enhancement of sodium caprate on intestine absorption and antidiabetic action of berberine
https://www.ncbi.nlm.nih.gov/pubmed/20237966/
Amorphous solid dispersion of berberine with absorption enhancer demonstrates a remarkable hypoglycemic effect via improving its bioavailability
https://pubmed.ncbi.nlm.nih.gov/24607213/
The best thing might be to cook with barberries:
https://thecaspianchef.com/2020/01/18/zereshk-polo-saffron-b...
> A number of studies assessing adherence to diabetes medications in patients with type 2 diabetes have reported that metformin has the lowest adherence rates when compared with other OAAs.