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Description
Figure 4 Indeed, requiring FAD as coenzyme, methylenetetrahydrofolate reductase (MTHFR) is responsible for the formation of 5-methyltetrahydrofolate

Sci Adv (2023) 9(22):eadg4993
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The lab tests referenced have not been cleared or approved by the U.S

In the identified literature there is however little rigorous study and quantification of this requirement
