GRAVOL^TM 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. GRAVOL^TM Ginger products are an effective natural treatment for nausea, vomiting and upset stomach.