Buy online from Long Life and you're guaranteed to receive the best resveratrol supplement in the UK, but certain groups of people should avoid using the compound, or at least seek medical advice before adding it to their dietary routine. Pregnant women and those under 18 are not recommended to take resveratrol for longevity, as are individuals who have a condition that might be worsened by exposure to estrogen. The compound may act like estrogen, so those with hormone-sensitive conditions like endometriosis, ovarian cancer, uterine or breast cancer, or uterine fibroids should not consider using capsules or powdered resveratrol.