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Herbal infusions, in general, do not contain caffeine, except for tea, be it black, green or red, but their safety during pregnancy is not entirely proven.
Unlike drugs, which are investigated in depth and based on those investigations, approved or not by the relevant agency, infusions, or medicinal herbs, are not, so little is known about side effects that could cause.
In the case of some of them, such as the chamomile, there are not enough studies in humans to tip the balance one way or the other, not even the few in animals can shed light on this issue, but given its history of use over the years, it tends to be assumed to be safe. Chamomile can be useful to improve insomnia situations in pregnant women, since it promotes relaxation.
Other herbs, such as aloe vera, pennyroyal, dandelion, mugwort, calendula or ginseng, they have a high chance of being unsafe in pregnancy, so they should be avoided, since the fetus can be compromised with the arrival, via the placenta, of certain substances. In particular, pennyroyal leaves contain a monoterpene that has been linked to abortions and with toxic properties at the liver and kidney level, so that, although its amount in infusion is much lower than in essential oil, it is safer avoid its consumption during pregnancy.
If they are potentially safe infusions of ginger, thyme, anise, rooibos, or the infusion of raspberry leaves. The infusion of nettles is safe as long as only the leaves of the plant are used, and not the roots. Rooibos has a large amount of antioxidants, infused ginger can help with morning sickness during the first months of pregnancy and the infusion of raspberry leaves can help the contractions in labor are more effective, so it is recommended not take it until week 38 of pregnancy. The infusion of nettles is a great source of vitamins and minerals, including iron and potassium and vitamins A, C and K. It also has stimulating effects on the uterus, so it is recommended not to take it during the first trimester and not to take it in very high amounts. elevated during the second.
However, there are no studies that prove the safety of any of them 100%, so, in any of the cases, it would be convenient to reduce their consumption to a minimum.
As for the teas, they all contain caffeine, approximately 40-50mg per cup, depending on the infusion time. In general, the results of studies conducted in pregnant women conclude that doses greater than 200mg of caffeine per day increase the risk of miscarriage and premature delivery, so it is not recommended to exceed that dose. In addition, caffeine is processed in the liver, so in pregnancy, when it already performs other essential functions such as endocrine, it can be overloaded if higher amounts are ingested. However, caffeine is the first substance to be released in the first few seconds of infusion, so by discarding the water from the first infusion, the amount of it in the tea can be minimized. As a benefit, tea contains polyphenols that prevent cardiovascular diseases, and antioxidants that slow down cellular aging and protect against certain types of cancer.
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