Caffeinated drinks need to be limited to one cup per day “Before more information in humans becomes available, women should be cautious about using ginseng in the first three months of pregnancy and it is always advisable for pregnant women to consult their doctor before taking any herbal supplement.” They have found evidence that ginsenoside Rb1 – one of the principal active components of ginseng – can cause abnormalities in rat embryos. Their research is published today (Thursday 25 September) in Europe’s leading reproductive medicine journal Human Reproduction[1]. There are also reports it can cause embroyo death Ginseng is not as good as anyone thinks especially if used long term.