Keto and Fasting Bad Breath: Causes and Fixes
Bad breath from keto diet or fasting smells fruity, not sulfurous — because it comes from acetone, not bacteria. What's normal, what's not, and how to fix it.
The Breathcure Journal Topic
Halitosis
Halitosis is the clinical term for chronic bad breath, and it deserves a clinical answer rather than a fresh-mint cover-up. The posts here cover what causes halitosis at a bacterial level, how it's diagnosed in practice, and the treatments that actually resolve it long-term. Each article is grounded in the work we do at the Center for Breath Treatment in Berkeley — including the diagnostic tools, oral-care protocols, and follow-up routines we use with patients who have tried everything else.
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Articles in this topic
Oral Probiotics for Bad Breath: What the Research Shows
Specific oral probiotic strains reduce volatile sulfur compounds in clinical trials — but most commercial products miss therapeutic doses. An evidence-led guide to what works, what to ignore on the label, and where probiotics plateau.
Is Your Tongue the Source of Your Bad Breath? The Complete Guide
Roughly 80% of chronic bad breath comes from bacteria on the back of the tongue. Learn how to test it yourself, scrape it correctly, and decide when cleaning alone is not enough.
How to Know If You Have Halitosis (Self-Test Guide)
How do I know if I have halitosis? Six reliable self-tests, what each result means, and how to tell chronic bad breath from a temporary smell.
Can Post-Nasal Drip Cause Bad Breath? The Sinus Connection Explained
Yes — post-nasal drip is one of the most under-diagnosed causes of chronic bad breath. Learn the mechanism, how to tell sinus breath from dental breath, and what actually treats it.
How to Get Rid of Halitosis Permanently
Chronic bad breath rarely responds to mouthwash and tongue scrapers alone. Learn the five root causes of halitosis — and the diagnosis-first treatment path that actually clears it for good.
Bad Breath During Pregnancy: Causes, Safe Remedies & When to See a Dentist
Why pregnancy hormones, dehydration, and morning sickness cause bad breath — and the safe, effective ways to manage halitosis during pregnancy.
Breath Treatment Starter Kit Review: DioxiRinse, DioxiBrite, Dentiva
An in-depth review of the Breath Treatment Starter Kit — how DioxiRinse, DioxiBrite, and Dentiva work together to treat chronic halitosis at the source.
How to Tell a Friend They Have Bad Breath: A Kind, Honest Guide
How to tell someone they have bad breath without hurting them. Common causes of halitosis, why honesty is the kind option, and where to get treatment.
Halitosis in the Workplace: The Career Cost of Chronic Bad Breath
Chronic bad breath can quietly affect confidence, workplace relationships, and career advancement. Learn what causes it and how professional treatment helps.
Why Does My Floss Smell? Real Causes and When to Worry
A bad odor on used floss isn't always bad breath — but it can be an early sign of gum disease. Learn what causes it and how to protect your gums.
Bad Breath and Antibiotics: Why the Improvement Doesn't Last
Why bad breath often improves on antibiotics and returns afterward — what the temporary effect tells you about the real cause of chronic halitosis.