Most of the early studies focused on its effects on the stomach and intestines
Though vitamins can be found naturally in foods, some body processes make them hard to absorb, and deficiencies can occur
If You Have No Absorption Issues : If your body absorbs B12 effectively from the digestive tract, oral supplements can be a great option for maintaining adequate levels over time
Certain medications may also interfere with absorption and cause deficiency, in particular, medicines prescribed for heartburn, antibiotics, blood pressure medicine, cholesterol-lowering drugs, diabetes medications and antipsychotic drugs
visceral fat fell about 40%. After withdrawal, insulin resistance returned in proportion to regained weight. Maintaining some weight loss did not preserve the full metabolic benefit when substantial regain occurred
I go into this topic further in my Youtube video about B12: Common risk factors for low vitamin B12 levels in older adults include : Low levels of stomach acid