B12 from food and supplements has to pass through a fairly involved process in the stomach and gut before your body can use it, and that process becomes less efficient with age, with certain medications, and with diets that include little or no animal protein
Its a maths-only tool that converts label amount and reconstitution volume into concentration and a measurable draw volume (mL and U100 units)
As we age, our stomachs produce less hydrochloric acid or stomach acid, which is needed to absorb B12
This includes vegans and vegetarians, older adults, individuals with atrophic gastritis, pernicious anemia, gastrointestinal disorders, those who have had gastrointestinal surgery and people who take certain medications including, but not limited to, estrogen (HRT), and birth control pills
By balancing neurotransmitters and stabilizing your mood, it can make the emotional challenges of weight loss easier to manage