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One of the leading voices in this space is Jimmy Norman

After considering all this data, many patients in this situation have chosen to stay on febuxostat, but each person, with their physician, makes this decision

This is due to the presence of intrinsic factor, a glycoprotein in the digestive tract that limits the bioavailability of B12

sugar-free with a long-established brand reputation What to consider Not third-party certified to USP or NSF standards Contains mannitol (sugar alcohol) which can cause GI upset in sensitive individuals Nature Made Sublingual Best budget pick Form & DoseCyanocobalamin (1,000 mcg per fast-dissolve tablet) Servings50 tablets per bottle Price Per Day~$0.24 to ~$0.31 Best ForTight budget with USP cert Verified July 2026 Included against our usual preference for methylcobalamin because: (a) it's USP-verified, a meaningful third-party quality certification that most pricier brands don't carry, and (b) the sublingual delivery still bypasses much of the stomach-acid absorption problem

(2014) Safety and Metabolism of AOD9604, a Novel Nutraceutical Ingredient for Improved Metabolic Health J Endocrinol Metab 4(1-2):114