Possible side effects of consuming ginger include gas, heartburn, upset stomach and mouth irritation as well as miscarriage if pregnant, says WebMD. Consuming ginger can reduce pain and inflammation, stimulate circulation, prevent colds caused by rhinovirus, inhibit salmonella and other bacteria, reduce gas and intestinal spasms, and prevent stomach ulcers, Everyday Health reports.
Possible risks associated with taking ginger are increased with high doses, or more than 5 grams a day. However, optimal doses of ginger are difficult to determine, as ginger supplements vary in terms of quality and active ingredients, states WebMD.
People who have diabetes, heart problems or who are pregnant should consult a doctor before taking ginger. Those with a bleeding disorder may not be able to take ginger, as ginger can increase the risk of bleeding. Studies have not shown if ginger is safe for children or women who are breast-feeding, explains WebMD.
Ginger has been found to assist digestion and saliva flow, according to WebMD, making it an option for nausea relief in those experiencing motion sickness or vertigo, postoperative patients, and some pregnant women with morning sickness, reports Everyday Health. Initial lab studies have found potential benefits in lessening swelling, lowering blood sugar and cholesterol, preventing Alzheimer's, and reducing the risk of blood clots, according to WebMD.