Does ginger help with diabetes? What the research does and doesn't show

A 2026 systematic review pooling 41 randomized trials found that, on average, people taking ginger had lower fasting blood sugar, insulin and HbA1c than people taking a placebo, with bigger differences in trials of people who already had a metabolic condition. The trials used a wide range of doses and lengths, and none of them tested ginger as a replacement for a diabetes medication.

What the evidence doesn't support

It doesn't support ginger as a treatment for diabetes, or as a substitute for a prescribed medication, blood-sugar monitoring or a diagnosed care plan — no trial pooled below tested ginger against a medication or in place of one. It doesn't support one specific milligram amount as "the" effective dose: both reviews below pooled trials that used a wide range of doses and durations, and neither breaks the result down by exact amount. And an average HbA1c drop across dozens of pooled trials isn't the same as a guarantee for any one person; individual results in the underlying trials varied.

What the trials found

A 2026 systematic review pooled 41 randomized controlled trials testing ginger supplementation against cardiovascular-disease and metabolic biomarkers. On average, fasting blood sugar fell about 12.8 mg/dL, insulin fell about 1.3 microU/mL, HOMA-IR (a marker of insulin resistance) fell about 0.51, and HbA1c fell about 0.68 percentage points, in ginger groups compared with placebo groups. The same pooled analysis found triglycerides and LDL fell and HDL rose, along with a small drop in systolic blood pressure. The trials it pooled varied widely in dose and length, and the review's own summary doesn't break the results out by which dose produced which effect — it reports the average across all of them. Effects were larger, on average, in trials of people who already had a metabolic condition than in trials of generally healthy volunteers.

A separate, earlier systematic review and meta-analysis pooled 14 randomized trials (473 people total) specifically in overweight and obese adults. It found ginger supplementation was linked to significantly lower fasting glucose and a lower HOMA-IR score than placebo, alongside a small drop in body weight and waist-to-hip ratio. That same review found no significant effect on insulin, triglycerides or LDL cholesterol — not every marker moved, even in the trials that did find a benefit for blood sugar.

Neither review reports ginger being tested against, or as an addition to, a diabetes medication such as metformin. Both are pooled analyses of trials that differed in population, dose and duration, which is why the size of the average effect can't be read as what any one dose would do for any one person.

Review	Trials pooled	Population	Key finding
2026 systematic review	41 RCTs	Mixed, larger effects with existing metabolic conditions	Lower fasting glucose, insulin, HOMA-IR and HbA1c on average vs. placebo
2019 meta-analysis	14 RCTs, n=473	Overweight and obese adults	Lower fasting glucose and HOMA-IR; no significant change in insulin, triglycerides or LDL

Questions people ask

Is ginger root good for diabetes?

Two pooled reviews of randomized trials found average improvements in fasting blood sugar, insulin resistance and HbA1c in people taking ginger versus placebo. That's evidence of an average biomarker effect across many small trials — it isn't evidence that ginger treats diabetes or replaces a prescribed medication or monitoring plan.

Does ginger root lower blood sugar?

In the pooled trial data above, fasting blood sugar was lower on average in ginger groups than placebo groups. The trials used a wide range of doses and lengths, so this doesn't translate into one specific amount that's been shown to lower blood sugar by a predictable amount.

What dose of ginger is used for blood sugar?

Neither review reports one dose as "the" effective amount — they pooled trials using a wide range of doses and durations and reported an average across all of them. See how much ginger should you take a day for the doses individual trials have used for other outcomes.

When to talk to a doctor

Diabetes is a diagnosed medical condition that, for most people, requires monitoring and medication. Nothing in the research above tested ginger as a replacement for either, and a change in average biomarkers across pooled trials is not a substitute for a doctor's guidance on blood sugar. Anyone with diabetes or prediabetes should talk to a doctor before adding a supplement, especially alongside a blood-sugar-lowering medication.

Related reading: ginger benefits: what the research does and doesn't show, does ginger help with obesity, and how much ginger should you take a day.