However, if left untreated, it can progress and cause: Chronic fatigue and overall weakness Dizziness Pale or yellowish skin tone Mental health problems such as depression, mood swings, irritability, and anxiety Loss of appetite, nausea, and diarrhea, leading to weigh loss Paresthesia: numbness, tingling or burning sensation in feet, legs, and hands Vision problems Vitamin B12 is an essential nutrient, meaning everyone should get it either from food or supplements
Cegolon L, Pichierri J, Mastrangelo G et al (2020) Hypothesis to explain the severe form of COVID-19 in Northern Italy
You should understand exactly what to expect, when to expect it, and why the benefits unfold in a specific sequence rather than appearing all at once
probably because of an altered sensation, unexplained pain is common in depression and is often the presenting and prevailing symptom (OSullivan, 2004