Long-term use: Clinical trials only ran 12 weeks, so long-term safety data (6+ months continuous use) comes from anecdotal reports
However, vitamin D is also essential for many other bodily functions, including immune function, muscle function, and cell growth and differentiation
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Ng FM, Sun J, Sharma L, Libinaka R, Jiang WJ, Gianello R
This guide helps clinicians make well-informed recommendations based on individual patient needs
Other factors that could lead to B12 deficiency are: Lack of adequate production of the intrinsic factor needed for B12 absorption B12 deficiency is common in elderly people as absorption of the vitamin reduces with age People who have had any intestinal surgery, such as that for weight loss Those with gut conditions such as Crohn's Disease, inflammatory bowel disease, or celiac disease QUESTION See Answer Vitamin B12 injections Vitamin B12 supplements are given based on the condition that causes deficiency