Supplement analysis backed by scientific evidence · PT

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Limited evidenceHeart & metabolic

Ginseng Berry Extract

The fruit of Panax ginseng, richer in ginsenoside Re than the root. One decent crossover trial in prediabetes is encouraging, but it is the only substantial human evidence.

Evidence last reviewed: August 2026

What the science says

  • Glucose metabolism in prediabetes Limited evidence

    A randomised, double-blind, placebo-controlled crossover trial in 195 people with prediabetes found a ginseng berry saponin capsule lowered 2-hour post-load glucose by about 1.0 mmol/L and improved HOMA-IR alongside lifestyle intervention, with no effect claimed on fasting glucose as a standalone result. Each treatment period was only 4 weeks and the product was a specific Chinese patent medicine.

  • Ginseng and glycaemic control generally Limited evidence

    A systematic review and meta-analysis of ginseng trials found small reductions in fasting glucose, but the trials were short, heterogeneous in species and preparation, and mostly did not use berry extract.

  • Weight and body composition Limited evidence

    Claims that ginseng berry aids weight loss come from mouse studies of ginsenoside Re; no human trial has shown a change in body weight.

Dosage & safety

Studied doseThe prediabetes trial used a standardised ginseng berry saponin capsule for 4 weeks. Commercial extracts are usually labelled at 100–200 mg/day standardised to ginsenoside Re. No dose-ranging work exists.
SafetyReported side effects of ginseng preparations include insomnia, headache, nervousness and, occasionally, raised blood pressure. Ginseng can interact with warfarin, with diabetes medication (additive glucose lowering) and with stimulants and MAO inhibitors. Avoid in pregnancy and breastfeeding, and use cautiously in hormone-sensitive conditions. Anyone with prediabetes should treat this as an add-on to, not a replacement for, diet and exercise.

Scientific references

Where to buy

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