Further, NICE and the BNF says that if there are neurological symptoms present, then every other day injections are the recommended treatment, so all the points you make about B12 being stored and sufficient are not really relevant
Best for when you experience Vitamin B12 Injection may support deficiency needs, low energy, fatigue, brain fog, mood balance, and hair, skin, and nail vitality
This way it bypasses the digestive system and is fully absorbed
VITAMINS AND SUPPLEMENTS Consumption of this product is responsibility of the person who uses and recommends, consult your doctor before taking any medicine
[5] Nevertheless, any signs of hypersensitivity (such as a diffuse rash, wheezing, or feeling of throat tightness) warrant stopping the injection and seeking prompt medical care