Library.

“Ginger is effective at reducing nausea in humans.”

Ginger's anti-nausea effect in humans is supported by a substantial body of evidence, though its strength varies by context. Multiple meta-analyses report statistically significant nausea reduction in pregnancy and postoperative settings, and ACOG endorses ginger as a first-line nonpharmacologic option for pregnancy nausea. However, evidence for chemotherapy-induced nausea in adults is weak or negative, and authoritative reviews (NCCIH, Cochrane) flag generally low-to-moderate evidence quality. The claim is directionally accurate but overstates the uniformity and certainty of the evidence.

“Consuming ginger after eating sushi kills most of the parasites that may be present in the sushi.”

This claim is false. While lab studies show ginger compounds can kill certain parasites at specific concentrations, there is no clinical evidence that the small amount of pickled ginger served with sushi achieves parasiticidal effects in humans. Public health authorities consistently identify freezing — not condiments — as the reliable method for controlling parasites in raw fish. The ginger served with sushi is traditionally a palate cleanser, not a food safety measure.