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Melatonin in Clinical Application: From "Sleep Hormone" to High-Efficiency Protective Molecule
A professional conversation on signal pathway modulation and mitochondrial integrity between Thorsten Schmitt and Dr. med. Matthias Kraft
Thorsten Schmitt: Matthias, in common parlance, melatonin is perceived almost exclusively as a sleep aid. However, you often describe it as one of the most underestimated "universal artists" of integrative medicine. Why is this molecule so relevant for the therapeutic professional community?
Dr. med. Matthias Kraft: That is a crucial point, Thorsten. Melatonin is an ancient protective molecule that existed in cells over three billion years ago, long before a day-night rhythm even existed. It is the strongest endogenous antioxidant we know—particularly for our mitochondria. Therapists must understand that melatonin is produced in every cell of the body, not just the pineal gland. It regulates fundamental processes such as inflammatory cascades, energy metabolism, and cellular communication.
Thorsten Schmitt: Looking at the research landscape: what are the most important areas of application where melatonin makes a clinical difference today?
Dr. med. Matthias Kraft: When bioavailability is ensured, I see five central pillars in therapeutic practice:
1. Complementary Oncology and the "Anti-Warburg Effect": This is a real highlight. Tumor cells mostly use fermentative glycolysis for energy production, known as the Warburg effect. Melatonin can reverse this metabolism and reactivate oxidative phosphorylation in the mitochondria. Furthermore, it inhibits metastasis by blocking the epithelial-mesenchymal transition (EMT).
2. Neuroprotection and "Silent Inflammation": Melatonin is amphiphilic and effortlessly crosses the blood-brain barrier. It caps the "silent heat" in the brain by blocking central inflammatory switches such as NF-κB and the NLRP3 inflammasome. This makes it a cornerstone in the prevention of Alzheimer’s and Parkinson’s.
3. Metabolic Syndrome and Fatty Liver: Studies prove that melatonin improves insulin resistance and reduces inflammatory processes in metabolic-dysfunction-associated steatotic liver disease (MAFLD). it acts as a natural regulator for connective tissue.
4. Biological Dentistry and Bone Metabolism: Melatonin is locally highly effective against pathogenic germs and biofilms in the mouth. Particularly valuable is its dual action on bone: it inhibits bone-degrading osteoclasts and simultaneously promotes the activity of osteoblasts, which is decisive for the integration of implants.
5. Gut Health and Microbiome: Melatonin increases the diversity of intestinal microbiota—especially the beneficial Akkermansia flora—and strengthens the intestinal barrier.
Thorsten Schmitt: In professional circles, there is often criticism that oral administration of melatonin capsules yields very inconsistent results. What is the reason for this?
Dr. med. Matthias Kraft: This is the problem of the so-called "black box" of absorption. With traditional capsules, bioavailability often averages only around 15% because the active ingredient undergoes a massive first-pass effect in the liver. To achieve clinically relevant levels in the blood and mitochondria, delivery forms such as melt-away lozenges are superior.
Thorsten Schmitt: What is the advantage of these melt-away lozenges?
Dr. med. Matthias Kraft: Through absorption via the oral mucosa, the active ingredient enters the systemic bloodstream directly, bypassing liver degradation. Pilot studies show that we can achieve serum concentrations corresponding to up to 85% of an intravenous administration. This allows the therapist to use melatonin as a precision tool to maintain stable active levels.
Thorsten Schmitt: What is your final piece of advice for colleagues?
Dr. med. Matthias Kraft: Melatonin is far more than a sleep aid; it is a protective shield for the cell. Therapists should always titrate the dosage individually and pay attention to the delivery form to exploit the full regenerative capacity of this molecule.
Thorsten Schmitt: Matthias, thank you very much for these profound insights!
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