GRAVOLTM Ginger Tablets, Liquid Gels and Lozenges contain proven therapeutic levels of Ginger – 20 mg of organic ginger extract (Zingiber officinale) (root & rhizome) – equivalent to 340 mg dried ginger root. This way, you know you’re getting the right amount to ginger to prevent and treat your symptoms. GRAVOLTM Ginger products are an effective natural treatment for nausea, vomiting and upset stomach.