However, allergic reactions to B12 shots are extremely rare

Common adverse effects include: Injection site reactions pain, redness, swelling, or bruising at the intramuscular injection site Gastrointestinal disturbances nausea, diarrhoea, or abdominal discomfort Headache and dizziness particularly following initial doses Skin reactions including rash, pruritus, or acne-like eruptions Flushing temporary redness of the skin Chromaturia red-coloured urine (harmless but can cause concern if unexpected) Less common but more serious reactions include: Hypersensitivity reactions ranging from mild urticaria to anaphylaxis (rare but potentially life-threatening) Hypokalaemia particularly during initial treatment when rapid cell production occurs [5] [16] Temporary changes in blood counts during correction of deficiency Interference with laboratory tests primarily with high-dose IV hydroxocobalamin used for cyanide poisoning, not typically with standard 1mg IM replacement doses Cautions and contraindications: Hypersensitivity to cobalt or vitamin B12 Cyanocobalamin should be avoided in Leber's hereditary optic neuropathy [2] [17] Chloramphenicol may reduce the haematological response to B12 therapy Patients receiving B12 injections outside clinical necessity face unnecessary risks without proven benefit

B12 supports a number of bodily functions that contribute to cognitive wellness, energy metabolism, and healthy blood cells
Instead, you may want to investigate an autoimmune diet, such as AutoImmune Paleo (AIP) or an autoimmune protocol diet to boost overall health with an autoimmune disease.[ref][ref] Essentially, the AIP diet removes many foods that are thought to either increase inflammation or cause some kind of immune system response
FTPP does not tell fat cells to release their contents or tell the brain to eat less