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The one real argument for injecting is bypassing first-pass metabolism, and the strength of that argument depends entirely on which bioavailability study you believe (3.5% in mice versus 38.4% in rats)
With insurance coverage (which has expanded significantly), out-of-pocket costs can range from $0 to $500 depending on the plan
There are no clear guidelines for how much folate you need to take if you consume alcohol
A lack of vitamin B12 can contribute to a variety of problems, including cognitive dysfunction
True B12 toxicity symptoms are rare but may include skin reactions, mild gastrointestinal disturbances, and headaches, particularly with injections
