I currently use Garden of Life Primal Defense Ultra. Because of the subtilis in it and not having too many histamine creating lacto strains. May or may not help you but did it for me.

I started with 1 a day and worked up to 3 a day over some weeks. I felt like crap for about 2 weeks. Like having a cold sick. Just no nose running and such. Then better than ever. Now I take one in the morning and one in the evening.

Oh and so I don't forget shortly after I also started keto. Real keto w/ less than 20g carbs. Did blood tests that confirmed I was in ketosis. That's the "and feeding them right" part. Did it for about a year which normalized all my off blood markers except for cholesterol which also improved but not below what is condered normal. Did it for a year. Now I no longer do keto but keep the sugar mostly away.