I found this an interesting paper.
I am looking for papers not authored by Nathan Bryan that either substantiate his approach or suggest variations. The paper linked had:
2.2. Dietary Nitrate
In addition to the oxidation of NO, nitrite is also derived from meat, vegetables as beetroot, lettuce, spinach, and drinking water that represent high natural dietary sources of inorganic nitrate (NO3). After being ingested, nitrate returns to the oral cavity through the blood circulation and reaches the salivary glands; finally, it is reduced to nitrite by the oral microflora
This is interesting simply because it makes the point that the simple pass through the mouth for NO precursors is probably one of the least important steps. It is the return via the blood circulation that is key for this.
Hence to me it seems that although a dilute solution of NO2/NO3 plus vitamin C might be useful on a one off basis actually what is much more important is to have the right balance of bacterial in the oral biome.
The two top bacteria for nitrate processing appear to be Prevotella and Veillonella
Other possibilities seem to be: Neisseria, Actinomyces, Fusobacterium, Campylobacter, Leptotrichia, Haemophilus, Rothia and Granulicatela.
This:
However, says:
Analysis using a terminal restriction fragment length polymorphism method and an international comparison suggest that the predominance of the genera Prevotella and Veillonella in the salivary microbiota is attributable to periodontal disease conditions, and that the predominance of the genus Neisseria indicates healthy periodontal conditions.
The question here, of course is whether Prevotella and Veilonella are there to help with periodontal disease or whether they hinder.
The first paper does say:
On the contrary, the daily use of an antiseptic mouthwash and tongue cleaning prevents the reduction of nitrate to nitrite and disrupts the enterosalivary cycle by affecting oral concentrations of commensal reducing bacteria. Therefore, nitrite does not achieve the acidic environment of the gastric cavity thus decreasing the S-nitrosothiols formation.
This
Says:
Preliminary in vitro and clinical evidence show that bacteria normally associated with disease, such as Veillonella (caries) and Prevotella (periodontal diseases and halitosis), decrease in the presence of nitrate.
So this seems to go for the balance of avoiding those two.
Neisseria also appears to be a pathogen.
GPT4 says:
The process of nitrate reduction in the oral cavity is facilitated by a group of bacteria that fall under the umbrella of âoral nitrate-reducing bacteria.â These bacteria are an integral part of the oral microbiota and can impact our health by contributing to cardiovascular health through nitric oxide (NO) generation.
Here are some of the oral bacteria associated with nitrate reduction:
-
Veillonella species: This group of bacteria is often identified as a significant nitrate-reducing species in the oral microbiome. A study by Hyde et al. in 2014 showed that Veillonella atypica was a prominent nitrate reducer.
-
Rothia species: Rothia species, including Rothia mucilaginosa, have also been found to have nitrate-reducing capabilities.
-
Neisseria species: Some Neisseria species, like Neisseria flavescens, have been shown to The process of nitrate reduction in the oral cavity is facilitated by a group of bacteria that fall under the umbrella of âoral nitrate-reducing bacteria.â These bacteria are an integral part of the oral microbiota and can impact our health by contributing to cardiovascular health through nitric oxide (NO) generation.
-
Actinomyces species: Certain Actinomyces species also contribute to the nitrate reduction process in the oral cavity.
These are just a few examples. The oral cavity is home to hundreds of species of bacteria, and itâs likely that many others also have some nitrate-reducing capabilities. Itâs important to note that while these bacteria can contribute to overall health, their roles are complex and dependent on a balanced oral microbiome. An overgrowth of certain bacteria, even those with beneficial aspects, can lead to oral health problems such as periodontal disease.
Please consult with a healthcare professional for a more detailed understanding of your oral microbiome.
I will come back to this at a later point, but I think the key to this issue is to know how to improve the oral microbiome.