Digestion · Immune support · Nausea relief
Ginger: grandma's spicy root for nausea, colds and heavy meals
What the research really shows for Zingiber officinale, the safe amount per day (including during pregnancy) and who should be careful with it.
By Mariana Farias, Founder & Editor of Las Recetas de mi Abuela · Updated November 4, 2026
Fact-checked against USDA FoodData Central, the NIH National Center for Complementary and Integrative Health (NCCIH), the American College of Obstetricians and Gynecologists (ACOG) and peer-reviewed studies in PubMed. Educational content — not medical advice.
Key takeaways
- Ginger's pungent compounds, gingerols and shogaols, are behind its best-documented benefit: easing nausea.
- It is one of the few natural remedies mentioned by obstetricians for morning sickness, at up to about 1 g of dried ginger a day.
- Smaller trials suggest benefits for menstrual cramps, slow digestion and blood sugar, with mixed results.
- Most adults tolerate it well; be careful with blood thinners, gallstones and large daily doses.
Grandma kept a knobby piece of ginger in the fruit bowl. A few slices went into the pot with lemon and honey when someone had a cold, a thin slice was chewed on long car trips, and a strong ginger tea appeared after heavy holiday meals. Ginger is one of the most studied culinary plants in the world — and the science agrees with grandma on at least one point: nausea.
What is ginger?
Ginger, Zingiber officinale, is a tropical perennial of the Zingiberaceae family — the same family as turmeric and cardamom. The part we use is not a root but a rhizome, an underground stem that grows horizontally and sprouts new shoots. It was domesticated so long ago in Maritime Southeast Asia that it no longer exists in the wild. Today India, China, Nigeria and Nepal are major producers, and Mexico grows ginger as well.
Fresh ginger is juicy and bright; dried ginger is hotter and more concentrated. That difference is chemistry: drying and cooking turn part of the gingerols into shogaols, which are about twice as pungent.
Active compounds
- GingerolsThe main pungent compounds of fresh ginger, especially 6-gingerol. Studied for anti-nausea, anti-inflammatory and antioxidant effects.
- ShogaolsFormed when ginger is dried or heated. More pungent than gingerols and very active in laboratory studies.
- ZingeroneCreated when ginger is cooked; gives cooked ginger its sweeter, milder spice.
- Zingiberene and other terpenesThe aromatic compounds of the essential oil, responsible for ginger's fresh, citrusy smell.
What science says about ginger
1. Nausea and morning sickness Good evidence
This is ginger's strongest use. Several clinical trials and systematic reviews show that ginger reduces nausea in early pregnancy better than placebo, and the American College of Obstetricians and Gynecologists lists ginger among the options that may help. Studies usually used about 250 mg of dried ginger four times a day — around 1 gram in total. For nausea after surgery, from chemotherapy or from motion sickness, the results are more mixed: some studies show benefits, others don't.
2. Digestion Limited human evidence
Small studies found that ginger speeds up gastric emptying — the time it takes for the stomach to pass food into the intestine — in healthy people and in people with functional dyspepsia (that heavy, too-full feeling after eating). That may explain why a cup of ginger tea after a big meal feels so good. Larger trials are still needed.
3. Menstrual cramps and joint pain Moderate evidence
Several small trials found that ginger powder taken during the first days of the period reduced menstrual pain better than placebo, and in some studies about as well as common pain relievers. For knee osteoarthritis, ginger extracts produced modest pain reductions. These studies used capsules with measured doses, not tea.
4. Blood sugar and metabolic support Mixed evidence
Meta-analyses of small trials in people with type 2 diabetes found that ginger supplements lowered fasting blood sugar and HbA1c slightly. The studies were short and varied in quality. Ginger can be part of a healthy diet, but it never replaces diabetes treatment, and it may add to the effect of glucose-lowering drugs.
5. Colds and immune support Traditional use
Ginger compounds show antioxidant, anti-inflammatory and antimicrobial activity in the lab, and hot ginger tea is a classic cold remedy across Asia and Latin America. There are no good trials showing that ginger prevents or shortens colds. What it does well is make warm fluids more pleasant when you're sick, and staying hydrated matters.
Botanical and nutrition facts
| Scientific name | Zingiber officinale Roscoe |
|---|---|
| Family | Zingiberaceae (ginger family) |
| Part used | Rhizome (underground stem), fresh or dried |
| Origin | Maritime Southeast Asia (only known in cultivation) |
| Main compounds | 6-Gingerol (fresh), 6-shogaol (dried/heated), zingerone, zingiberene |
| Flavor | Hot, peppery, citrusy, slightly sweet |
| Nutrient | Per 100 g | Per 1 tbsp sliced (6 g) |
|---|---|---|
| Energy | 80 kcal | 5 kcal |
| Carbohydrates | 17.8 g | 1.1 g |
| Dietary fiber | 2.0 g | 0.1 g |
| Sugars | 1.7 g | 0.1 g |
| Protein | 1.8 g | 0.1 g |
| Potassium | 415 mg | 25 mg |
| Magnesium | 43 mg | 2.6 mg |
| Vitamin C | 5 mg | 0.3 mg |
| Vitamin B6 | 0.16 mg | 0.01 mg |
Source: USDA FoodData Central (SR Legacy, "Ginger root, raw"). About 5 g of fresh ginger equals roughly 1 g of dried ginger. Values are rounded.
Dosage calculator
How much ginger should I use?
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👵 Grandma's ginger, lemon and honey tea
- Wash a piece of fresh ginger about the size of your thumb's top joint (2–3 cm) and cut it into thin slices. No need to peel it.
- Simmer the slices in 300 ml of water, covered, for 10 minutes. The longer it simmers, the spicier it gets.
- Turn off the heat, wait 2 minutes and add the juice of half a lemon.
- Strain into a cup and stir in 1 teaspoon of honey. Sip it slowly while it's warm.
Precautions and contraindications
🟢 Generally safe
- Healthy adults using ginger in food or 1–3 cups of ginger tea a day.
- Pregnancy: up to about 1 g of dried ginger (≈5 g fresh) a day, as used in studies, after talking with your doctor.
🟡 Ask your doctor first
- Blood thinners or antiplatelet drugs (warfarin, clopidogrel): ginger may affect clotting in some people.
- Diabetes medication: ginger may lower blood sugar slightly — monitor your levels.
- Gallstones: ginger stimulates bile flow; ask your doctor before using it as a remedy.
- Planned surgery: stop ginger supplements about 2 weeks before.
- Heartburn: large amounts can cause reflux, gas or a burning mouth.
🔴 Avoid
- More than about 4 g of dried ginger (≈20 g fresh) a day from all sources.
- High-dose ginger supplements in late pregnancy or with a history of miscarriage or bleeding, unless your doctor approves.
- Undiluted ginger essential oil on the skin or by mouth.
Frequently asked questions
Is ginger safe during pregnancy?
In studies of morning sickness, pregnant women took up to about 1 gram of dried ginger a day, divided into several doses, without clear safety problems, and obstetricians mention ginger as an option. Talk to your doctor before using it, especially if you have a history of bleeding or miscarriage.
How much ginger can I take per day?
For most adults, up to about 4 grams of dried ginger a day, or roughly 20 grams of fresh ginger, is commonly cited as an upper limit. A cup of ginger tea made with 5 grams of fresh ginger is well below that.
Does ginger help with colds?
There is no good evidence that ginger prevents or cures colds. Hot ginger tea with lemon and honey can soothe your throat and help you drink more fluids, which is useful when you are sick.
Is fresh or dried ginger better?
Both work. Dried ginger is more concentrated and contains more shogaols, so it is hotter; about 1 gram of dried ginger equals roughly 5 grams of fresh. Most nausea studies used dried ginger powder in capsules.
Can ginger interact with medications?
Ginger may affect blood clotting and blood sugar, so people taking blood thinners or diabetes medication should talk to their doctor before using large amounts or supplements.
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Perfect pairing
Ginger + turmeric
They are botanical cousins, and together they make grandma's golden milk. Learn the one ingredient that multiplies turmeric absorption — and why turmeric supplements are not as harmless as they look.
Read the turmeric guide →Keep reading
More ingredients from grandma's kitchen
CloveSyzygium aromaticum
LemonCitrus limon
Ceylon cinnamonCinnamomum verum
ChamomileMatricaria chamomilla
TurmericCurcuma longa
GarlicAllium sativum
OreganoOriganum vulgare
RosemarySalvia rosmarinus
Bay leafLaurus nobilis
PeppermintMentha × piperita
HibiscusHibiscus sabdariffa
Aloe veraAloe barbadensis
Chia seedsSalvia hispanica
Star aniseIllicium verum
ValerianValeriana officinalis
Apple cider vinegarMalus domestica
FlaxseedLinum usitatissimum
EucalyptusEucalyptus globulus
Raw honeyApis mellifera
Sources
- U.S. Department of Agriculture. FoodData Central — Ginger root, raw. fdc.nal.usda.gov
- NIH National Center for Complementary and Integrative Health (NCCIH). Ginger. nccih.nih.gov
- American College of Obstetricians and Gynecologists. Practice Bulletin No. 189: Nausea and Vomiting of Pregnancy (2018).
- PubMed — systematic reviews of ginger for nausea and vomiting of pregnancy. pubmed.ncbi.nlm.nih.gov
- PubMed — ginger and primary dysmenorrhea. pubmed.ncbi.nlm.nih.gov
- PubMed — meta-analyses of ginger and glycemic control. pubmed.ncbi.nlm.nih.gov
⚕️ This guide is for educational purposes and does not replace the advice of a doctor, obstetrician or pharmacist. Read our full medical disclaimer.