How much, and how to use it
The practical limit usually quoted is up to four cups of ginger tea a day. In dried ground form, the amount studied in nausea research is around one gram a day spread over small doses — practically a small amount, less than half a teaspoon. There are many practical ways to take it; choose what suits your stomach:
A practical tip from many women's experience: nausea gets worse on an empty stomach, so try small frequent sips of ginger tea rather than one large cup, and start before getting out of bed if your nausea is worst in the morning. And if the smell of ginger itself bothers you — which happens — do not force it; aversion to smells is a normal part of the first trimester.
Where caution applies
The important distinction is between ginger as food and drink, and concentrated high-dose supplements sold for other purposes. High doses may affect blood clotting, so ask your doctor if you take blood thinners, or have surgery or a scheduled caesarean coming up. Ginger can also increase heartburn in some women — already a common pregnancy complaint — so if you notice that, cut back.
Myth Ginger is a hot herb that heats the body, and may cause bleeding or miscarriage — so pregnant women must avoid it.
Fact This is one of the most commonly repeated claims without support. The idea that "hot herbs cause miscarriage" comes from an old folk classification of foods into hot and cold, not from medicine. Ginger in particular is one of the few herbs studied in pregnancy, and those studies have not shown an increased risk of miscarriage or birth defects at normal amounts. The irony is that ginger is usually recommended in pregnancy rather than forbidden, precisely because it helps with nausea.
When ginger is not enough
Ginger helps with mild to moderate nausea, but there is a line you should not push past on your own. Call your doctor if you are vomiting several times a day and cannot keep fluids down, if you have lost weight, or if you feel dizzy and dehydrated and are passing little urine. These can be signs of hyperemesis gravidarum, a medical condition that needs real treatment — not patience and not herbs. Do not feel you are "making a fuss"; asking for help here is the right move. Also ask your doctor before using concentrated ginger supplements or if you take long-term medication.