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Native Mass Spectrometry for the Characterization of Structure and Interactions of Membrane Proteins

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Both were removed from the FDA Category 2 list in April 2026 and are on the July 23 to 24, 2026 advisory agenda, but they cannot be compounded until the committee recommends them and the FDA completes rulemaking, which takes time

Injectable forms bypass absorption issues entirely and work regardless of stomach acid or intrinsic factor status

Scherer K, Brockow K, Aberer W, Gooi JHC, Demoly P, Romano A, et al

However, if a deficiency developed during treatment, it will not self-correct just because the medication stopped