Aloe (often called aloe vera) produces two substances, gel, and latex, which are used for medicines. Aloe gel is the clear, jelly-like substance found in the inner part of the aloe plant leaf. Aloe latex comes from just under the plant’s skin and is yellow in color. Some aloe products are made from the whole crushed leaf, so they contain both gel and latex. The aloe that is mentioned in the Bible is an unrelated fragrant wood used as incense.
Aloe medications can be taken by mouth or applied to the skin. Aloe gel is taken by mouth for osteoarthritis, bowel diseases including ulcerative colitis, fever, itching and inflammation, and as a general tonic. It is also used for stomach ulcers, diabetes, asthma, and for treating some side effects of radiation treatment.
But most people use aloe gel topically, as a remedy for skin conditions including burns, sunburn, frostbite, psoriasis, and cold sores. Some people also use aloe gel to help surgical wounds and bedsores heal faster. There is some science supporting these uses. Some chemicals in aloe gel seem to be able to increase circulation in the tiny blood vessels in the skin, as well as kill bacteria. Together, these effects suggest that aloe gel might be effective in speeding wound healing. But it’s too early to come to that conclusion. Evidence is contradictory. One study suggests that aloe gel may actually delay wound healing.