People with diabetes who use insulin or glucose-lowering medication should also monitor their blood sugar, since ginger may lower it further. Those taking heart or blood-pressure medicines should discuss regular high-dose ginger use with a healthcare professional.
Pregnant women can often use small amounts of ginger for nausea, but supplements or large quantities should be discussed with their doctor, particularly later in pregnancy. People with gallstones or sensitive stomach conditions may also find that ginger worsens discomfort.
This does not mean everyone with these conditions must completely avoid ginger. Small culinary amounts are often tolerated, but supplements and concentrated doses deserve more caution, especially when medications or chronic health problems are involved.
