The Claim
Supplementation with Streptococcus salivarius M18 has no effect on salivary nitrite concentration, salivary nitrate concentration, or salivary pH in healthy adult males.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Taking Streptococcus salivarius M18 as a supplement does not change the levels of nitrite, nitrate, or pH in saliva in healthy adult males.
See the scientific wording
Streptococcus salivarius M18 supplementation does not alter salivary nitrite, salivary nitrate, or salivary pH in healthy adult males, indicating that its effect on plasma nitrite is not mediated through changes in the oral environment.
The probiotic bacteria trigger immune cells in the body to produce more nitric oxide, which quickly turns into nitrite in the blood, raising its levels without changing anything in the mouth.
What the research says
1 studyThis probiotic pill increased a helpful compound in the blood, but it didn’t change anything in the mouth — like saliva acidity or nitrite levels — meaning it must be working through a different path than changing mouth bacteria.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.