Folic acid, the synthetic form of the B vitamin folate, has been linked to heart health and cancer prevention, among other possible benefits. But studies have also tied it to higher risks of cancer. Is it protective in some cases, but dangerous in others?
Researchers have long noted an association between low levels of the B vitamin folate and depression. But it’s hard to tease apart the many biochemical, genetic, lifestyle and nutritional factors that can contribute to depression as well as to folate deficiency.