Can favism be inherited by the next generation?

Favism is a subtype of glucose-6-phosphate dehydrogenase (G6PD) deficiency. It commonly manifests as hemolytic anemia triggered by ingestion of fava beans; however, the precise mechanism underlying this hemolysis remains unclear. Notably, only a minority of individuals with G6PD deficiency in the same geographic region develop favism, and affected individuals do not necessarily experience symptoms every time they consume fava beans. So, is favism hereditary? Let’s explore this further.

Is favism inherited by offspring?

Favism is an inherited hemolytic disorder and therefore can be passed on to the next generation. Affected individuals typically present with a constellation of symptoms following fava bean consumption—symptoms primarily attributable to a genetic defect. As a hereditary condition, if either parent has favism, their children have a definite risk of inheriting the disease.

Since favism is hereditary, children of affected parents certainly face some risk of developing the disease. Research indicates that favism is an X-linked recessive disorder—the defective gene resides on the X chromosome. Thus, if the mother has favism, each son has a 1-in-4 (25%) chance of inheriting the condition. If both parents are affected, each child—regardless of sex—has a 1-in-4 (25%) risk of inheriting favism. Importantly, even if a child does not develop favism, they may still inherit the disease-causing allele; consequently, their own offspring could potentially develop favism.

Treatment for favism may include glucocorticoids (e.g., adrenal corticosteroids). In severe cases involving significant hemolysis and anemia, blood transfusion may be required. Correction of acidosis must also be prioritized.

Patients are advised to consume fresh vegetables and fruits in moderation. Their diet should emphasize light, easily digestible foods. Crucially, patients must strictly avoid fava beans and all fava bean–derived products—including vermicelli (cellophane noodles), broad bean paste, and similar items. Additionally, certain medications known to trigger hemolysis—such as antipyretics (e.g., acetaminophen) and sulfonamide antibiotics—should also be avoided.

We hope the above information is helpful to you.