Chronic severe halitosis can only be eliminated by Bentonite clay detox. All other things are bull.
1 tablespoon bentonite clay powder mixed with 200 grams of fresh apple juice before breakfast and same before bed. Diet should be high carb. 3-6 months and your evil halitosis is gone.
I myself suffered from chronic halitosis since I was 14, during 30 years. I've tried everything in the world, but nothing helped.
Bentonite detox is the only cure.
Trust me, try it, and mother nature will cure you.
You will be smell free.
God bless you and good luck.
Bad Breath Halitosis