With consistent use, people often report that crow's feet, forehead lines, and other little texture issues become less obvious
Absorption problems Even with adequate intake, absorption can be reduced by: Certain gastrointestinal conditions affecting the stomach or small intestine Some medications Age-related reduction in stomach acid (which can affect absorption) Autoimmune gastritis (often historically referred to as pernicious anaemia) This is a well-recognised cause of B12 deficiency and may require ongoing management
Common Side Effects Mild pain or redness at the injection site Temporary dizziness Serious Side Effects Allergic reaction (rare) Swelling or breathing difficulty Serious reactions are uncommon, but you should seek medical help if symptoms worsen
1976 Jul;36(1):127-36
Pagan C, Benabou M, Leblond C, Cliquet F, Mathieu A, Lemire N, et al