A systematic review published in August 2026 pooled 12 randomized trials of daily ginger supplementation. Systolic blood pressure fell by about 5 mmHg and diastolic by about 2 mmHg on average.
The effect was larger in adults whose readings were already running high. The pooled analysis, led by Mehdi Karimi and colleagues in the Journal of Human Nutrition and Dietetics, covered doses from 230 to 3,000 mg per day.
The authors rated the certainty of the evidence as low on the GRADE scale. That means the direction of the effect looks real, but the size could still shift as better trials come in.
What the numbers actually look like
Systolic blood pressure fell by 5.03 mmHg (95% CI −8.49 to −1.57) across the trials, and diastolic by 2.03 mmHg (95% CI −3.90 to −0.15). In participants whose baseline systolic reading was above 120 mmHg, the drop was closer to 6.88 mmHg.
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Trials using at least 2,000 mg a day showed a bigger systolic reduction than lower-dose studies. For context, 2 grams is roughly a teaspoon of fresh grated ginger. A pinch tossed into a stir-fry or a tea will not add up to the amounts used in the studies.
Sore joints and post-workout pain
A double-blind trial run by researchers at the University of Georgia gave 2 grams of ginger daily for 11 days to volunteers who then performed heavy elbow-flexor exercises. Raw ginger reduced next-day muscle pain by 25 percent, and heat-treated ginger by 23 percent, compared with placebo. The results were published in the Journal of Pain.
For people with knee osteoarthritis, a 12-week trial of 1 gram of ginger powder per day found lower C-reactive protein and TNF-alpha, two markers of inflammation. Ginger is not a substitute for standard osteoarthritis care. Readers with persistent joint pain should talk to their doctor.
Digestion, nausea and the gut
Johns Hopkins Medicine points to ginger as one of the better-supported anti-inflammatory foods. According to the Johns Hopkins article, ginger appears to speed gastric emptying, ease bloating and gas, and the American College of Obstetricians and Gynecologists lists it as an acceptable non-drug remedy for pregnancy-related nausea.
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A 2024 review of clinical trials in irritable bowel syndrome and inflammatory bowel disease concluded that roughly 2,000 mg of ginger a day may help reduce inflammation, dyspepsia and gut irritation. The trials were small and heterogeneous, and the authors called for more high-quality studies before firmer guidance is possible.
How much, and who should be careful
Most of the trials used doses between 1 and 3 grams a day, well above what a single seasoned meal delivers. Whole-food ginger in normal cooking amounts is considered safe for most healthy adults.
Ginger can affect blood clotting and may interact with anticoagulants such as warfarin. People on blood-thinning drugs, pregnant readers considering it for nausea, and anyone scheduled for surgery should check with their physician before taking a ginger supplement.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.