“…The authors postulated that the mutation protected against CL/P by decreasing enzymatic activity, thereby increased cellular folate levels. Three intronic alleles of MTR, involved in SAM metabolism, may also be protective against CL/P (Salamanca et al, 2020a). In contrast, the most widely documented polymorphism in folate metabolism, MTHFR c.677C>T, decreases enzymatic activity and has been associated with increased risk for CL/P (Ramirez‐Chau, Blanco, Colombo, Pardo, & Suazo, 2016).…”