Common Names: aloe
Latin Names: Aloe vera, Aloe africana, Aloe arborescens, Aloe barbadensis
- Aloe is a cactus-like plant that grows in hot, dry climates. It is cultivated in subtropical regions around the world, including the southern border areas of Texas, New Mexico, Arizona, and California.
- Historically, aloe has been used for skin conditions and was thought to improve baldness and promote wound healing.
- Aloe is used topically (applied to the skin) and orally. Topical use of aloe is promoted for acne, lichen planus (a very itchy rash on the skin or in the mouth), oral submucous fibrosis, burning mouth syndrome, burns, and radiation-induced skin toxicity. Oral use of aloe is promoted for weight loss, diabetes, hepatitis, and inflammatory bowel disease (a group of conditions caused by gut inflammation that includes Crohn’s disease and ulcerative colitis).
- In 2002, the U.S. Food and Drug Administration issued a ruling that required manufacturers to remove aloe from over-the-counter laxative products because of a lack of safety data.
How Much Do We Know?
- A number of studies have investigated the usefulness of aloe as a dietary supplement or a topical product for health purposes in people.
What Have We Learned?
- Clinical research suggests that topical application of an aloe-based gel twice daily (along with medical soap and tretinoin gel) may improve acne.
- Clinical research suggests topical application of aloe gel may speed burn healing. There also is evidence that treatment with aloe vera may reduce pain from burns.
- Research suggests topical use of aloe also may help people with herpes simplex, lichen planus, or psoriasis.
- Three trials (with a total of 236 adult participants) have evaluated the use of oral doses of aloe vera for symptoms of irritable bowel syndrome. Results from one trial showed a benefit; the other two trials showed no benefit of aloe vera over placebo.
- In a small European study, 44 adults with ulcerative colitis were randomly assigned to receive aloe vera gel or a placebo twice daily for a month. Almost half of the people treated with aloe vera responded to the treatment whereas 14 percent of those treated with placebo responded.
- Aloe vera has been studied in clinical (human) trials for diabetic foot ulcers and dental plaque, but there’s not enough scientific evidence to show whether aloe vera is helpful for these conditions. A 2009 review article examined data from a mix of laboratory, animal, and clinical trials and concluded that more research is necessary to explore aloe’s clinical effectiveness for a number of different skin conditions.
What Do We Know About Safety?
- Topical use of aloe gel is generally well tolerated. However, there have been occasional reports of burning, itching, and eczema with topical use of aloe gel. Oral use of aloe latex can cause abdominal pain and cramps. Oral consumption of aloe leaf extracts (for as little as 3 weeks and as long as 5 years) has been related to cases of acute hepatitis.
- Animal studies have noted an association between aloe vera leaf extract taken orally and gastrointestinal cancer in rats and mice; however, concerns were expressed about the differences in the product used in that study and those commonly used by consumers. Thus, more research is needed to assess the relevance to human health.
- Overuse of aloe latex may increase the risk of adverse effects from the drug digoxin, used for some heart problems.
- Aloe—both in gel and latex form—when taken by mouth may be unsafe during pregnancy and while breastfeeding.
Keep in Mind
- Take charge of your health—talk with your health care providers about any complementary health approaches you use. Together, you can make shared, well-informed decisions.
The NCCIH Clearinghouse provides information on NCCIH and complementary and integrative health approaches, including publications and searches of Federal databases of scientific and medical literature. The Clearinghouse does not provide medical advice, treatment recommendations, or referrals to practitioners.
Toll-free in the U.S.: 1-888-644-6226
tty (for deaf and hard-of-hearing callers):
Email: email@example.com (link sends e-mail)
A service of the National Library of Medicine, PubMed® contains publication information and (in most cases) brief summaries of articles from scientific and medical journals. For guidance from NCCIH on using PubMed, see How To Find Information About Complementary Health Approaches on PubMed.
National Institute of Environmental Health Sciences (NIEHS)
NIEHS supports research to understand the effects of the environment on human health and is part of NIH.
P.O. Box 12233, MD K3-16
Research Triangle Park, NC 27709-2233
Toll-free in the U.S.: 919-541-3345
Email: firstname.lastname@example.org (link sends e-mail)
Office of Dietary Supplements (ODS), National Institutes of Health (NIH)
ODS seeks to strengthen knowledge and understanding of dietary supplements by evaluating scientific information, supporting research, sharing research results, and educating the public. Its resources include publications (such as Dietary Supplements: What You Need To Know) and fact sheets on a variety of specific supplement ingredients and products (such as vitamin D and multivitamin/mineral supplements).
Email: email@example.com (link sends e-mail)
- Aloe. Natural Medicines website. Accessed at naturalmedicines.therapeuticresearch.com on October 14, 2019. [Database subscription].
- Fifi AC, Axelrod CH, Chakraborty P, et al. Herbs and spices in the treatment of functional gastrointestinal disorders: a review of clinical trials. Nutrients. 2018;10(11):E1715.
- Long V. Aloe vera in dermatology—the plant of immortality. JAMA Dermatology. 2016;152(12):1364.
- National Institute of Environmental Health Sciences. NTP Speaks About Aloe Vera. https://www.niehs.nih.gov/news/newsroom/interviews/aloevera/index.cfm. Accessed on June 24, 2020.
- National Toxicology Program. Toxicology and carcinogenesis studies of a nondecolorized whole leaf extract of Aloe barbadensis Miller in F344/N rats and B6C3F1 mice (drinking water study). August 2013.
- Norman G, Christie J, Liu Z, et al. Antiseptics for burns. Cochrane Database of Systematic Reviews. 2017(7):CD011821. Accessed at www.cochranelibrary.com on October 31, 2019.
- Quezeda SM, Briscoe J, Cross RK. Complementary and alternative medicine. Inflammatory Bowel Diseases. 2016;22(6):1523-1530.
- Rodriguez S, Dentali S, Powell D. Aloe vera. In: Coates PM, Betz JM, Blackman MR, et al., eds. Encyclopedia of Dietary Supplements. 2nd ed. New York, NY: Informa Healthcare; 2010:7-14.
This publication is not copyrighted and is in the public domain. Duplication is encouraged.
NCCIH has provided this material for your information. It is not intended to substitute for the medical expertise and advice of your health care provider(s). We encourage you to discuss any decisions about treatment or care with your health care provider. The mention of any product, service, or therapy is not an endorsement by NCCIH.