Good info here.  Berberine is very popular in this part of the country.  I think half or 3/4th's of the people I know are taking it for one reason or another.  Since they removed the best brand of French Maritime Pine Bark (pycnogenol) from the market most of the people are taking straight up Berberine with very similar results. 

Here's a tip:  Order as much berberine as you can afford right now, because they will be taking it off the market soon, too.  You can bet your white cowboy hat on that as a fact.

https://articles.mercola.com/sites/articles/archive/2018/12/31/alkaloid-compounds-in-rosy-periwinkle.aspx