Because B12 is found naturally in animal products, groups that exclude meat and fish from their diet are generally more vulnerable to deficiency.
The health body continues: “Strict vegetarians and vegans are at high risk for developing a B12 deficiency if they don’t eat grains that have been fortified with the vitamin or take a vitamin supplement.
“Conditions that interfere with nutrient absorption, such as celiac or Crohn’s disease, can cause B12 trouble.”
Those who undergo stomach surgery can also experience B12 deficiency, as this may deplete the concentration of intrinsic factor in the stomach.
Source: Daily Express