Aloe is a cactus-like plant that grows in hot, dry climates. In the United States, aloe is grown in Florida, Texas, and Arizona. Aloe 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.

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Aloe medications can be taken by mouth or applied to the skin. People take aloe gel by mouth for weight loss, diabetes, hepatitis, inflammatory bowel diseases, osteoarthritis, stomach ulcers, asthma, radiation-related skin sores, fever, itching and inflammation, and as a general tonic. A chemical in aloe called acemannan is taken by mouth for HIV/AIDS. Aloe extract is used for high cholesterol.

Aloe latex is taken by mouth mainly as a laxative for constipation. It is also used for seizures, asthma, colds, bleeding, lack of a menstrual period, swelling of the colon (colitis), depression, diabetes, eye conditions that cause blindness (glaucoma), multiple sclerosis, hemorrhoids, varicose veins, joint inflammation, osteoarthritis, and vision problems. Fresh aloe leaves are taken by mouth for cancer.

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