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Common indications include: Pernicious anaemia an autoimmune condition where the stomach cannot produce intrinsic factor, a protein necessary for B12 absorption [8] [9] Malabsorption disorders including Crohn's disease, coeliac disease, or following gastric surgery Strict vegan or vegetarian diets with confirmed deficiency though high-dose oral B12 may be sufficient if no malabsorption exists Certain medications such as metformin or proton pump inhibitors that may interfere with B12 absorption [9] [10] Neurological symptoms including peripheral neuropathy, memory problems, or balance difficulties related to deficiency Diagnosis should be confirmed through blood tests measuring serum B12 levels, full blood count, folate, and often anti-intrinsic factor antibodies

When toxic exposure, gut-derived inflammation, low zinc, oxidative stress, low SAM or elevated SAH exceed the livers metabolic reserve, detoxification may become less efficient and contribute to fatigue, brain fog, mood symptoms and toxic overload
10.1002/elps.200600022 52 Vilar NetoJ
Key pathways include TGF-beta superfamily signaling, ubiquitin-proteasome components, DNA repair enzymes, and antioxidant response genes (SOD, catalase)
Neither supplement has been evaluated by FDA to diagnose, treat, cure, or prevent any disease