Ginger

EVIDENCE: MODERATE

Also sold as: Zingiber officinale, gingerol, ginger root, 6-shogaol

Ginger has human research for nausea, commonly at about 1 g daily, with smaller studies of pain and blood-sugar measures. Findings from gram-level doses do not establish the same effects from a small, undisclosed share of a blend.

Compiled by iSupplementReviews editorial team ·Updated 2026-10-06 · 4 sources

Type: Botanical rhizome (antiemetic/anti-inflammatory)
Studied dose: 1–1.5 g/day powdered root for nausea (divided); pain/glycemic trials 1–3 g/day
Best form: Dried powdered root (most trials) or standardized gingerol extract; fresh root is less concentrated
Upper limit: No established upper intake limit — >4 g/day raises heartburn/bleeding-risk cautions; pregnancy cap ~1 g/day per guidelines
Our rating: MODERATE — Several human trials — limits in size, duration, or independence

What is ginger?

Ginger is the rhizome of Zingiber officinale, used in food and supplements. Its gingerols and shogaols have anti-nausea and anti-inflammatory effects. Human reviews support some nausea uses, generally with amounts around a gram daily.

What does the research show?

Claim	Evidence	Dose studied	Verdict
Pregnancy nausea	Systematic review/meta-analysis (multiple trials)	~1 g/day	Supported
Postoperative nausea	Pooled analysis — reduced incidence ~30%	~1 g pre-op	Supported — moderate
Motion sickness	Mixed trials	1–2 g	Mixed-positive
Knee-OA/menstrual pain	Small trials	1–3 g/day	Small positive signal
Blood-sugar markers	Small trials	2–3 g/day	Weak-positive
Oral/dental benefit	No data	—	Unproven

What dose was studied?

Every positive finding sits at or near the gram mark; the smallest effective regimens are ~1 g/day of powdered root. Fifty milligrams in a blend is a trace contribution: the chemistry is real, the quantity isn’t.

Side effects

Heartburn and mouth/throat irritation at high doses. Pregnancy guidelines cap supplemental ginger ~1 g/day.

Drug interactions

Blood thinners: mild blood-thinning activity; warfarin stacking is the textbook caution.
Diabetes medications: mild glucose lowering can add to hypoglycemic drugs.
Antacids/acid suppressants: ginger increases gastric activity; not a safety issue, a comfort one.

Who should not take it

People on blood thinners without awareness; gallstone patients at high doses (it stimulates bile); pregnancy beyond guideline doses; and pre-surgery (bleeding-risk stop rules apply like everything else).

What the authorities say

MSKCC: nausea use has supporting clinical evidence. The American College of Obstetricians includes ginger among reasonable options for pregnancy nausea, one of the only botanicals with a mainstream medical-society nod.

What to know about ginger

Ginger’s human nausea evidence does not establish the same effect from a small blend amount or prove dental benefits. Compare the dose and preparation with the specific trial, and retain the blood-thinner and other safety cautions.

Frequently asked questions about Ginger

Does ginger work for nausea?

Yes. It's one of the most consistently supported uses in all of herbal medicine. A systematic review for pregnancy nausea found ginger beat placebo (and compared with B6) across trials; a combined analysis for postoperative nausea found ~1 g significantly reduced risk. It's real, dose-dependent, and cheap: the reason 'natural' nausea products all contain it.

What dose of ginger works?

The trials cluster at 1–1.5 g/day powdered root (often split into 2–4 doses). That's the minimum effective zone; a 50 mg capsule line is 5% of the studied amount.

Is ginger anti-inflammatory?

Real pharmacology, modest outcomes: gingerols and shogaols inhibit the same COX/LOX pathways as NSAIDs, just weaker. Human pain trials show small effects for knee osteoarthritis and menstrual pain at gram doses: supportive, not a treatment.

Why is ginger in a dental supplement?

No studied reason. It's a fixture of 'digestive/cleanse' template blends (it's the digestive herb of the formula, alongside the liver stack). Its nausea credentials don't transfer to teeth.

Is ginger safe?

At culinary amounts, yes; billions eat it daily. At supplement doses: heartburn is the main complaint; mild blood-thinning activity makes it a theoretical blood-thinner stack; pregnancy guidance caps it ~1 g/day; and it may mildly lower blood glucose (relevant with diabetes meds).