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and a two-adult IV safety pilot at 10 mg and 20 mg (Lee, Walker & Ayadi, 2025)
Vegans and Vegetarians: B12 is found almost exclusively in animal products, so those on plant-based diets must use fortified foods or supplements Older Adults: reduced stomach acid can decrease B12 absorption from food as we age People with Pernicious Anemia: this autoimmune condition prevents the body from making intrinsic factor, a protein needed for B12 absorption Individuals with Gastrointestinal Conditions: diseases like Crohn's or Celiac disease can impair nutrient absorption Patients Who Have Had Gastric Surgery: procedures like gastric bypass can reduce the body's ability to absorb B12 Certain Medications: drugs such as Metformin and proton pump inhibitors (PPIs) can interfere with B12 absorption It's important to distinguish between using vitamin b12 injectable for humans for a diagnosed medical need versus for general wellness
On the cognitive side, brain fog, slower reaction time, difficulty concentrating, and headaches are common
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You eat less because you're not hungry
It has not yet been FDA approved, but is showing great promise for weight loss
