D-Limonene delivers relief from occasional heartburn, acid indigestion, and upset stomach.* Its key ingredient, orange peel extract (ROH10®), provides lasting relief without shutting down the production of stomach acid.* Provides lasting relief of occasional heartburn for up to six months or more!* Patent pending.D-Limonene also plays an essential role in immune system health.* Through its involvement in DNA synthesis and repair and the regulation of cellular proliferation, D-Limonene provides gastroprotective effects, especially when combined with other immune therapies.*