To understand how retatrutide compares to other weight loss options, read our [retatrutide vs tirzepatide comparison](/guides/retatrutide-vs-tirzepatide-comparison).* --- ## References - [USP Chapter 797: Pharmaceutical Compounding - Sterile Preparations]( *United States Pharmacopeia*, 2023
Vitamin B12 is a water-soluble vitamin essential for red blood cell formation, neurological function, and DNA synthesis
While Vitamin B12 can be obtained from dietary sources such as meat, fish, dairy products, and fortified cereals, some individuals may have difficulty absorbing it due to medical conditions or dietary restrictions
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If not addressed, insufficient B12 levels can impact the production of red blood cells, nerve function, and overall vitality
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