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If appetite is low, prioritize protein density

The four forms (vitamins) of B12 are all deeply red colored crystals and water solutions, due to the color of the cobalt-corrin complex (biologically relevant enzyme, it is the "core" of vitamin B12)

According to Harvard Health, B12 deficiency can be sneaky and harmful often developing silently over years before symptoms become apparent

Nausea or Upset Stomach: Some people may experience gastrointestinal discomfort, such as nausea, vomiting, or diarrhea, although these side effects are rare

Among these would include mild diarrhea and itching, as well as headaches and nausea

Additionally, individuals interested in B12 should consult their doctor before taking an oral supplement