There are several factors which may contribute to a vitamin D deficiency: Lack of sun exposure to naturally produce vitamin D (use of sunscreen or indoor jobs, environmental pollution) Advanced age, as the ability to naturally synthesize vitamin D decreases Fat absorption disorders such as celiac disease or Crohns disease Melanated skin tones, which decreases the ability to naturally absorb UV rays to produce vitamin D Allergy or intolerance to foods rich in Vitamin D (dairy products and fatty fish) If unable to achieve the recommended daily allowance of vitamin D (600 to 800 international units (IU) for adults) with lifestyle or diet modification alone, you may consider supplementation, which can be taken in pill form or given as an injection

Potential interactions include: Metformin (used for type 2 diabetes) Proton pump inhibitors (PPIs) and H2-receptor antagonists (used for acid reflux) Colchicine (used for gout) Nitrous oxide (anaesthetic gas that can inactivate B12) Chloramphenicol (may reduce the haematological response to B12 therapy) If you take any of these medications long-term, discuss B12 monitoring with your healthcare provider
Allergic reactions include: itching, eczema, urticaria, redness of the skin, edema can be severe, generalized malaise
Trump would always use the tools at his disposal to achieve his trade policy goals, and that the president was not going to allow his trade policy to be undermined simply because one tool was limited by a court
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