Research[edit]Scientific evidence for the cosmetic or therapeutic effectiveness of aloe vera is limited and frequently contradictory.[4][5] Despite this, the cosmetic and alternative medicine industries regularly make claims regarding the soothing, moisturizing, and healing properties of aloe vera.[3][42]
Two 2009 reviews of clinical studies determined that all were too small and faulty to allow strong conclusions to be drawn, but concluded: "there is some preliminary evidence to suggest that oral administration of aloe vera might be effective in reducing blood glucose in diabetic patients and in lowering blood lipid levels in hyperlipidaemia. The topical application of aloe vera does not seem to prevent radiation-induced skin damage. The evidence regarding wound healing is contradictory. More and better trial data are needed to define the clinical effectiveness of this popular herbal remedy more precisely."[6][43] One of the reviews found that Aloe has not been proven to offer protection for humans from sunburn.[43]
A 2007 review of aloe vera use in burns concluded, "cumulative evidence tends to support that aloe vera might be an effective intervention used in burn wound healing for first- to second-degree burns. Further, well-designed trials with sufficient details of the contents of aloe vera products should be carried out to determine the effectiveness of aloe vera."[44] Topical application of aloe vera may also be effective for genital herpes and psoriasis.[6][45] A 2014 Cochrane review found no strong evidence for the value of topical application of aloe vera to treat or prevent phlebitis caused by intravenous infusion.[46]
Aloe vera gel is used commercially as an ingredient in yogurts, beverages, and some desserts,[47][48][49] although at certain doses, its toxic properties could be severe whether ingested or topically applied.[50] The same is true for aloe latex, which was taken orally for conditions ranging from glaucoma to multiple sclerosis until the FDA required manufacturers to discontinue its use.[51]