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A maximum strength vitamin B12 supplement can provide 5,000 mcg of B12 per serving and is designed for adults with very low levels of vitamin B12 as determined by a healthcare professional

10.1002/(sici)1096-8628(19990820)88:4 3.3.co;2-m 58 KaleA.NaphadeN.SapkaleS.KamarajuM.PillaiA.JoshiS.et al

Wong CM, Marcocci L, Das D et al (2013) Mechanism of protein decarbonylation

But you can consider supplementing with it

It was suggested that the cysteine S -conjugate sulfoxide ( S -(3-chloroallylsulfinyl)-l-cysteine) undergoes a [2,3]-sigmatropic rearrangement to the sulfinate ester 2-amino-3-(1-chloroallyloxythio)propanoic acid, which may decompose to toxic acrolein and cysteine sulfinyl chloride (Anders, 2008, Park et al., 1992)

The evaluators were situated in a controlled environment, with each participant occupying an individual space where environmental conditions were maintained as consistently as possible