b12 self administered injections | Vitamin B12 Therapy | Hanover, MA B12 Shots at Home: How,

When taken orally, these nutrients can lose up to 80% of their potency in your digestive tract

Doctors should know about these interactions, mainly for patients with B12 deficiency or at risk

These include: Meat Fish Poultry Milk Eggs Fortified breakfast cereals Fortified breads Fortified nutritional yeasts Fortified plant milks If you follow a vegan diet (meaning you don't eat any animal products, including meat, milk, cheese, and eggs) or you're a vegetarian who doesn't eat enough eggs or dairy products, you could be lacking in vitamin B12

Deficiency is common in those with fatigue, brain fog, or nutrient absorption issues, especially individuals with gastrointestinal conditions, vegans and vegetarians, or those taking medications like metformin or proton-pump inhibitors