Best boric avid brand?

Hi everyone! Any suggestions on which boric acid brand works best? There are various types for sale and I was wondering if any work better than others? 

I buy my boric acid on Amazon, I tried PhD brand at first  because it was rated  as the most popular but it did not work for me, so I went with BoricLife by NutraBlast and have been using them for over three months now. They seem to be effective at keeping BV at bay.

none of them.....bv will just end up coming back worse then before....try raw probiotics for women...the only thing that has ever worked so good for me

My GYNE had me buy these Boric Acid vaginal inserts which had to be compounded at the pharmacy, 

BORIC ACID LACTOBACILLUS, 600/300 MG, to be used once daily at bedtime.

No change, waste of money!!!  If I were to make a list of everything I have tried, you would find it unbelievable.  I have concluded and I mentioned this in some of my earlier posts that this BV scourge will not go away and that you learn to live with it!!!  No matter what you use, it may disappear for a few days, but then returns with a vengeance.  Kinda reminds me of Cancer...once you have surgery and chemo, it returns with a vengeance and kills you.  BV will not kill you but it can make your life "miserable".

It's weird to me that the doctors haven't pinpointed what causes bv! Why does it exist? Seems like it just popped up out of nowhere I was sexually active in highschool I never experienced it. Even when I started having kids was 22 didn't have it..it's something..but yea you might as well say it's like cancer it's something they can't or don't want to find a cure for