Science

The oral microbiome has a chemistry problem. We formulated a solution.

TL;DR

What Clera does, in four sentences. Xylitol disrupts Streptococcus mutans metabolism, reducing acid output in plaque. Microcrystalline Hydroxyapatite Complex donates calcium and phosphate ions that integrate directly into enamel crystal structure. A three-strain oral probiotic blend competitively displaces cariogenic and periodontal pathogens while modulating biofilm pH. Guava Fruit Powder delivers polyphenols and vitamin C to support antioxidant activity in gum tissue. One chewable, once daily, after meals.

How Does Hydroxyapatite Support Enamel?

Tooth enamel is 96% hydroxyapatite by weight — a calcium phosphate mineral with the formula Ca₁₀(PO₄)₆(OH)₂. When enamel is exposed to dietary acids, mineral ions dissolve from the crystal lattice in a process called demineralization. Microcrystalline Hydroxyapatite Complex supplies free calcium and phosphate in a crystalline form that is structurally identical to the mineral phase of natural enamel, allowing these ions to integrate epitaxially — lattice-to-lattice — into softened enamel surfaces rather than simply coating them.

This is the biomimetic distinction. Fluoride works by converting hydroxyapatite to fluorapatite, a chemically distinct compound. Hydroxyapatite remineralizes using the tooth's own native mineral, restoring the original matrix rather than substituting it.

Structure/function claim: Microcrystalline Hydroxyapatite Complex provides calcium and phosphate to support enamel mineral density.

In Clera's formula: At 5mg per chewable, the hydroxyapatite is delivered in microcrystalline form for surface contact during chewing. Dissolution in saliva releases bioavailable Ca²⁺ and PO₄³⁻ ions at the enamel interface, where post-meal demineralization is most active.

How Does Xylitol Affect Oral Bacteria?

Streptococcus mutans is the primary cariogenic organism in human dental plaque. It ferments sugars to lactic acid, driving enamel demineralization. Xylitol enters S. mutans cells via the fructose phosphoenolpyruvate phosphotransferase system (fructose-PTS), where it is phosphorylated to xylitol-5-phosphate — a dead-end metabolite the bacterium cannot process further. The accumulation of xylitol-5-phosphate is cytotoxic to the cell. Simultaneously, because xylitol is not fermented, it does not generate the acid byproducts that drive plaque pH below the critical 5.5 demineralization threshold.

With chronic exposure, xylitol selectively suppresses S. mutans populations while leaving acid-tolerant, health-associated commensals largely unaffected — a competitive exclusion effect through metabolic attrition.

Structure/function claim: Xylitol helps maintain a healthy oral environment by supporting a balanced oral microbiome.

In Clera's formula: Xylitol DC (Direct Compression grade) is the primary bulk ingredient, serving as both active and chewable base. Chewing distributes xylitol across tooth and plaque surfaces via saliva, maximizing contact time with the bacterial membrane.

What Does Lactobacillus salivarius LS97 Do in the Mouth?

Lactobacillus salivarius strains colonize oral epithelium and compete for adhesion sites against cariogenic and periodontal pathogens. Strains of this species have demonstrated downregulation of S. mutans glucosyltransferase genes (gtfB, gtfC, gtfD) — the enzymes responsible for synthesizing the sticky extracellular polysaccharide matrix that enables plaque biofilm adhesion. Less matrix means less structural scaffolding for pathogenic communities to organize. Separately, L. salivarius cell-free supernatants have been shown to disrupt phosphoenolpyruvate-dependent phosphotransferase systems in S. mutans, a second independent inhibition pathway.

Structure/function claim: Lactobacillus salivarius LS97 supports a balanced oral microbiome and healthy biofilm composition.

In Clera's formula: LS97 is included as part of the 3-strain blend at 20mg total combined. The chewable delivery format releases the strain at the oral mucosa — its target site — rather than routing it through the GI tract as a gut probiotic.

What Does Lactobacillus paracasei LC86 Do in the Mouth?

Lactobacillus paracasei LC86 exhibits multimechanistic competitive exclusion against oral pathogens. It produces bacteriocins — ribosomally synthesized antimicrobial peptides — with activity against both Streptococcus mutans and periodontal pathogens including Porphyromonas gingivalis. LC86 also demonstrates coaggregation with pathogenic species: it physically binds to harmful bacteria, preventing their adhesion to enamel and epithelial surfaces. In microbial community terms, it reduces pathogen colonization not just by killing but by physically occupying the same attachment geography.

Structure/function claim: Lactobacillus paracasei LC86 supports healthy microbial balance and gum tissue health.

In Clera's formula: LC86 complements LS97's biofilm-disruption mechanism with direct pathogen inhibition. The two strains address the same ecology from different molecular angles — one disrupting the structural scaffolding, the other antagonizing pathogen viability.

What Does Lactobacillus acidophilus LA85 Do in the Mouth?

Lactobacillus acidophilus is a homofermentative lactic acid bacterium. In the oral context, LA85 colonizes at the exclusion of cariogenic species, reducing the pathogenic acid load by displacing the organisms responsible for it, while contributing to a pH environment that health-associated oral bacteria tolerate better than strict pathogens do. Probiotic LAB strains have also demonstrated capacity to maintain salivary buffering capacity and inhibit growth of periodontal pathobionts.

Structure/function claim: Lactobacillus acidophilus LA85 supports oral microbiome balance and healthy salivary pH.

In Clera's formula: LA85 rounds out the 3-strain blend as the third ecological mechanism: where LS97 targets biofilm structure and LC86 targets pathogen adhesion and viability, LA85 addresses the broader salivary microenvironment, supporting conditions that favor commensal over pathogenic flora.

Does Guava Fruit Powder Actually Matter for Teeth?

Psidium guajava fruit is among the densest natural sources of polyphenols and vitamin C available in supplement-grade powder form. In the oral context, polyphenols — particularly quercetin, kaempferol, and ellagic acid — inhibit the growth of Streptococcus mutans and reduce plaque formation. Simultaneously, vitamin C (ascorbic acid) is an obligatory cofactor in collagen synthesis; gingival connective tissue is collagen-dependent, and ascorbate insufficiency is histologically associated with impaired tissue integrity. The anti-inflammatory activity of guava polyphenols has been demonstrated in randomized controlled trials to reduce gingival inflammation scores.

Structure/function claim: Guava Fruit Powder provides antioxidants and vitamin C to support gum tissue and a healthy oral environment.

In Clera's formula: At 325mg — the largest active dose by weight — Guava Fruit Powder is the gum-tissue counterpart to the enamel-facing hydroxyapatite and the microbiome-facing probiotics. It extends the formula's scope from tooth surface to the soft tissue environment surrounding it.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

The System: How These Ingredients Work Together

Oral health degradation follows a predictable sequence: acidogenic bacteria colonize, produce acid, lower pH, demineralize enamel, and trigger inflammation in adjacent soft tissue. Clera's formula is designed to interrupt this cascade at four distinct points simultaneously.

No single ingredient addresses the full cascade. The clinical rationale for a multi-ingredient formula is that oral dysbiosis is a systems problem: intervening at only one node leaves the others intact. The synergy is not marketing language — it is the reason the formula is designed this way.

Clera vs. Common Alternatives

Frequently Asked Questions

Q: Is hydroxyapatite as effective as fluoride for enamel remineralization?
Hydroxyapatite and fluoride operate through different mechanisms and are not directly equivalent. Fluoride converts existing hydroxyapatite to fluorapatite, increasing acid resistance. Hydroxyapatite donates native mineral ions directly to enamel, restoring original crystal structure. Both have clinical evidence supporting remineralization benefits. Hydroxyapatite offers the additional advantage of being fluoride-free and microbiome-neutral. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Q: Can probiotics actually survive in the mouth long enough to matter?
Oral mucosal adhesion is the relevant endpoint, not gut colonization. Strains like L. salivarius and L. paracasei have demonstrated oral epithelial adhesion capacity and colonization persistence in clinical studies. Chewable delivery releases the strains directly at the mucosal target site, which is mechanistically appropriate. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Q: How much xylitol does Clera contain, and is that a meaningful dose?
Xylitol DC is the primary ingredient by volume in Clera's formula. Clinical studies showing S. mutans reductions have used doses ranging from 5–11g/day. Clera is designed as one component of a daily oral hygiene routine; dose concentration is calibrated for post-meal use when oral pH is most dynamic. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Q: Why does Clera use three probiotic strains instead of one?
Each strain addresses a distinct mechanism: LS97 targets biofilm structural formation, LC86 targets pathogen adhesion and produces bacteriocins against both cariogenic and periodontal species, and LA85 modulates the broader salivary microbial environment. A single strain cannot cover all three simultaneously. The three-strain approach is a deliberate systems-design decision, not a marketing stack. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Q: Is Clera a replacement for brushing?
No. Clera is a daily supplement designed to complement — not replace — mechanical oral hygiene. Brushing physically removes plaque. Clera works at the biochemical and microbiological level to support the oral environment between brushing events. Think of it as the difference between cleaning a surface and treating the conditions that make it dirty. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

⚠️ FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Clera is a dietary supplement. Consult your healthcare provider before use if you are pregnant, nursing, have a medical condition, or are taking medications.