Publisher HSS Journal Accessed Jun 27, 2026 Study type Systematic Review Limitations: A review can map the evidence base but cannot establish benefit where underlying human trials are limited
A deficiency can disrupt nerve signals, leading to symptoms like tingling, numbness, and cognitive issues like "brain fog." Furthermore, B12 is indispensable for DNA synthesis and supports metabolism by helping convert food into usable energy
Amgen, the pharmaceutical company that produces Enbrel in the United States, still has patent protection over the drug, meaning other companies cannot yet make biosimilar versions of the medication that tend to be less expensive. There is no Enbrel biosimilar (comparable to a generic) yet
As with any injection, minor soreness at the injection site may occur
Choline, is an essential nutrient that helps to support the liver in its processing and excretion of chemical waste products
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