Vitamin B12 is naturally found in animal products, including fish, meat, poultry, eggs, and dairy
B12 deficiency can lead to symptoms such as fatigue, weakness, shortness of breath, cognitive changes, peripheral neuropathy (pins and needles), and anaemia
A history of hypothyroidism and the use of thyroid replacement medication should not exclude participation, as long as the amount of thyroid medication a participant is taking is appropriate to what they need
In nature, vitamin B12 is primarily found in fish, meat, eggs, and dairy
It is located on the banks of the confluence of the Madre de Dios River and the Tambopata River and is one of the main commercial centres of the Amazon
PubMed indexes the peer-reviewed BPC-157 literature