(AIs are established when there is insufficient information to determine EARs and RDAs.) For children ages 113 years, the RDA increases with age from 0.9 to 1.8 g/day

Other groups who may benefit include: Patients following gastric surgery (gastrectomy, bariatric procedures) where intrinsic factor production or absorption sites are compromised Individuals with malabsorption disorders such as Crohn's disease, coeliac disease, or chronic pancreatitis Strict vegans and vegetarians with dietary insufficiency, though oral supplementation is usually tried first Elderly patients with atrophic gastritis or reduced gastric acid production Patients on long-term metformin or proton pump inhibitors, which can impair B12 absorption Individuals with nitrous oxide exposure (recreational or medical), which can cause functional B12 deficiency Diagnosis typically involves serum B12 measurement, with levels below approximately 148 pmol/L (though thresholds vary between laboratories) generally indicating deficiency
Back of the arm is the winner for me to extend my time on 2.5
Also - has your GP checked your ferritin levels, done a full iron panel (better marker of true iron status), checked your folate levels
Our team will create a customized plan to meet your goals