The recommended dose ranges widely from 500 mg to 9 g/day dried root or equivalent; however, as there are wide variations in the gingerol concentrations in commercial ginger supplements (Schwertner et al 2006) the effective dosage will depend on the preparation and the indication for use.
• Dried root: 1-3 g daily in divided doses or 1-2 g taken as a single dose for nausea and vomiting.
• Infusion: 4-6 slices of fresh ginger steeped in boiling water for 30 minutes. ADVERSE REACTIONS
Gastric irritation, heartburn and bloating have been reported in clinical trials (Arfeen et al 1995). Contact dermatitis of the fingertips has also been reported (Seetharam & Pasricha 1987) with topical use. Ginger 515
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