Some species, in particular Aloe vera are used in alternative medicines and in home first aid. Both the translucent inner pulp and the resinous yellow exudate from wounding the Aloe plant are used externally to relieve skin discomforts. Systematic reviews of randomised and controlled clinical trials have provided evidence that Aloe vera has a strong medicinal effect. Other research however suggests Aloe vera can significantly slow wound healing compared to normal protocols of treatment. Today, the gel found in the leaves is used for soothing minor burns, wounds, and various skin conditions like eczema and ringworm. The use of this herbal medicine was popularized in the 1950's in many Western Countries. The gel's effect is nearly immediate, plus it also applies a layer over wounds that is said to reduce the chance of any infection.