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Other symptoms of vitamin B12 deficiency Other symptoms of the condition are listed by Bupa as: Feeling very tired Breathlessness even after a little exercise Heart palpitations Headaches A reduced appetite A sore mouth and tongue The health organisation adds: If you have vitamin B12-deficiency anaemia, you may also look pale or jaundiced (have a yellowy tinge to your skin and the whites of your eyes)

El Sahly says its a good idea to call your doctor about next steps, just to be on the safe side

For researchers and labs

However, because there is no routine surveillance of peptide use in Australia, we dont yet know which peptides are most commonly used or how patterns of use are changing over time