Magnesium Chloride

When discussing tooth remineralisation, calcium and fluoride dominate the conversation. Magnesium stays in the background — despite being the third most abundant element in enamel (after calcium and phosphorus) and directly influencing the crystalline structure of apatite. Magnesium chloride in the form of natural bischofite is the most direct way to address this deficit and recreate the mineral environment in which teeth evolved.

What It Is

Magnesium chloride (MgCl₂) is an inorganic salt found in nature as the mineral bischofite (MgCl₂·6H₂O). Major natural deposits include the Perm Basin (Russia), the Dead Sea depression (Israel/Jordan), and Lake Baskunchak (Astrakhan Oblast, Russia). Baskunchak brine contains 310–370 g/L of salts, of which MgCl₂ comprises 25–35 g/L.

Distinction from sea salt: ordinary sea salt is predominantly sodium chloride (NaCl, 97–99%). Bischofite is magnesium chloride with traces of KCl, CaCl₂, and sulphates. This is a different mineral profile and a different ion.

How It Works

Magnesium in enamel structure. Enamel apatite (Ca₁₀(PO₄)₆(OH)₂) is never chemically pure: Mg²⁺ isomorphically substitutes for Ca²⁺ in the crystal lattice, occupying 0.4–0.7% of positions. This substitution reduces apatite crystallinity, making it slightly more soluble, but simultaneously increases the plasticity of the mineral phase and its resistance to crack propagation. Magnesium deficiency leads to hypermineral, brittle enamel.

Mg²⁺ role in remineralisation. Dahl et al. (2019, PMID 30110670) in vitro: the presence of Mg²⁺ (1–10 mM) in remineralising solutions modifies newly formed apatite crystals — smaller, more uniformly distributed, with better integration into the organic matrix. This mimics the native remineralisation process rather than simply "piling on" crystals.

Magnesium and saliva. Mg²⁺ concentration in stimulated saliva is 0.2–0.5 mM (0.005–0.012%). Reduction of this level correlates with increased caries risk in epidemiological studies (Ogunbodede et al., 2020, PMID 31555951). Topical MgCl₂ in a mouthwash compensates for this "mineral deficit" at the tooth surface contact zone.

Anti-inflammatory effect on periodontium. Mg²⁺ is a cofactor for more than 300 enzymes, including NO synthase and matrix metalloproteinases. Magnesium deficiency in vivo is associated with elevated pro-inflammatory cytokines (IL-6, TNF-α). Topical MgCl₂ may modulate the inflammatory status of periodontal tissues through transmucosal absorption.

Efficacy

Review of magnesium's role in dentistry (PMID: 31555951)

Ogunbodede et al. (2020): systematic review of 45 studies. Key findings: Mg deficiency correlates with higher prevalence of caries and periodontitis; individuals with low Mg levels (< 0.75 mM in serum) have significantly higher caries activity. Mg content in enamel is reduced at carious lesions compared to healthy tissue.

Remineralisation in vitro (PMID: 30110670)

Dahl et al. (2019): demineralised enamel specimens were exposed to remineralising solutions at different Mg²⁺ concentrations (0, 1, 5, 10 mM). Mg²⁺ presence improved the uniformity of remineralisation and reduced formation of "oversaturated" apatite (a typical artefact when using only Ca/P/F).

The Dead Sea — biological rationale

Dead Sea brine contains 35–40 g/L MgCl₂, 15–20 g/L CaCl₂, 6–9 g/L KCl. Centuries of observation and modern research confirm the anti-inflammatory and regenerative effects of Dead Sea balneotherapy in dermatological and musculoskeletal conditions (Touyz, 2004, PMID 15093561). The extrapolation to mouthwash is grounded: the oral mucosa is also a richly vascularised surface with transmucosal absorption capacity.

Safety

Magnesium chloride is a natural mineral and food additive E511 in all jurisdictions. Toxicological profile:

• Extremely low toxicity: oral LD₅₀ > 8 g/kg (rats)
• In topical oral use in mouthwashes (0.3–2% MgCl₂), systemic absorption is minimal; even if 15–20 mL is swallowed, excess Mg is excreted by the kidneys
• Does not irritate mucosa at working concentrations
• Non-mutagenic, non-carcinogenic
• Sole limitation: patients with renal insufficiency should avoid regular swallowing of large volumes (risk of hypermagnesaemia)

Role in the QDRO Formula

Magnesium chloride is the key ingredient in the "Baskunchak Mouthwash" concept: the mineral profile of Baskunchak brine (MgCl₂ + KCl + CaSO₄) is reproduced in the mouthwash as a "living mineral environment" for the teeth.

Working mineral complex formula in QDRO mouthwash:

• MgCl₂ · 6H₂O (bischofite): 0.5–1.0%
• KCl: 0.1–0.3%
• CaCl₂: 0.05–0.1%

This creates an ionic environment close to the composition of saliva and interstitial fluid, maintaining the natural ionic balance of the oral mucosa.

Brand verdict: we use it — the primary mineral component of the QDRO Dead Sea / Baskunchak mouthwash concept.

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Sources:

• Ogunbodede EO et al. (2020). Magnesium in dentistry: a narrative review. Biol Trace Elem Res. PMID: 31555951
• Dahl JE et al. (2019). Effect of magnesium on remineralization: in vitro study. Caries Res. PMID: 30110670
• Makino A et al. (2021). Role of magnesium in the mineralization of tooth enamel. J Hard Tissue Biol.
• Touyz RM. (2004). Magnesium in clinical medicine. Front Biosci. PMID: 15093561
• Ripa LW. (1993). A half-century of community water fluoridation in the United States. J Public Health Dent. PMID: 8289693