A leaky barrier lets toxins enter and causes dangerous swelling
While it can be found as part of the normal microflora of the gastrointestinal tract, it can also cause severe diarrhoea in people who have recently taken antibiotics
Common Symptoms of B12 Deficiency When Vitamin B12 levels drop too low you can experience a variety of symptoms including: Impaired mental functionality poor memory, brain fog, confusion, anxiety, irritability Muscular weaknesses overall muscle weakness, tender calves, numbness and/or tingling in your extremities, Sensations of pins and needles due to nerve damage, Glossitis and mouth ulcers, Mood changes: depression, psychosis and irritability, Some loss in sense of touch, walking and vision problems, Appetite Changes Loss of appetite and weight loss, anemia, Low energy general fatigue (especially in the afternoon), shortness of breath, pale or yellowing complexion, Migraine-like Symptoms lightheadedness, dizziness, blurry vision, sensitivity to light, etc What Causes a Vitamin B12 Deficiency
This is because your body gradually stores and then uses B12 over several years
Keeping those two things separate the documented figure versus the efficacy claim is the whole point of the structure