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Vitamins, minerals, and supplements Some vitamins and supplements, You need vitamin B2 for proper digestion

And then theres the safety question

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Look for: HPLC purity reported as a percentage (target 98% or above), molecular weight confirmation near 340.38 g/mol by mass spec, appearance (blue to blue-green powder or solution), water content by Karl Fischer titration, residual solvents within USP limits, and a third-party lab name with a report date

Conrad et al., 2013

Another critical function of vitamin B12 is giving the digestive system energy to digest food and metabolism with carbohydrates, fats, and proteins