Longevity pathways activated NAD+-dependent enzymes like SIRT1, tied to DNA repair and stress response, become more active
If you are a vegetarian or vegan, knowing that you are at risk for B12 deficiency is essential
Rarely, allergic reactions can occur, presenting as hives, difficulty breathing, or swelling of the face, lips, tongue, or throat
Although it's less common, people with vitamin B12 deficiency caused by a prolonged poor diet may be advised to stop taking the tablets once their vitamin B12 levels have returned to normal and their diet has improved. Good sources of B12 include: Meat Salmon and cod Milk and other dairy products Eggs For vegetarians and vegans there are other foods that contain B12 such as yeast extract as well as some fortified breakfast cereals.
Jumping straight to 100+ mg daily can increase side effects like nausea or fatigue