Aloe Vera Juice

📜 Historical Use

Aloe is a cactus-like plant of hot, dry climates, native to subtropical regions including areas along the southern United States border. Its medicinal use is ancient and was overwhelmingly topical — for skin conditions and to promote healing — which is also where the modern evidence is strongest. Drinking it is a comparatively recent commercial development.

📊 What the Research Shows

The evidence for aloe is much stronger applied to skin than swallowed. Topically, clinical research suggests aloe gel may speed burn healing and reduce burn pain, and two small studies suggest topical gel combined with other treatments may improve acne; there is limited evidence for genital herpes, lichen planus, psoriasis, radiation-therapy skin damage and mouth sores. Taken orally, a small amount of research suggests aloe may reduce blood sugar and HbA1c in people with diabetes, and one small study found a specific oral aloe gel product modestly reduced weight and fat mass over eight weeks. Evidence is insufficient for eczema, diabetic foot ulcers, irritable bowel syndrome and ulcerative colitis. So the honest position on drinking it: promising for blood sugar, thin everywhere else.

Aloe is sold as inner-leaf gel juice, as latex, and as whole crushed leaf, and the label is the only thing that tells you which one you have — look for inner-leaf gel that has been decolorized. Short-term oral use of aloe gel has been studied up to 42 days; there is no evidence base for drinking it indefinitely, so treat it as a short course rather than a daily habit. Read the toxicity section before choosing a whole-leaf product.

Do not take aloe by mouth in pregnancy or while breastfeeding, in any form. Oral aloe latex causes abdominal pain, cramps and diarrhoea, and oral consumption of aloe leaf extracts has been linked to cases of acute hepatitis. Repeated laxative use depletes potassium, which matters if you take digoxin or a loop or thiazide diuretic. Avoid non-decolorized whole leaf extract.

⚠️ What happens if taken in excess:

Short-term oral use of aloe gel appears safe up to 42 days, which is the extent of what has been studied. The serious concerns attach to the other forms. Oral aloe latex causes abdominal pain, cramps and diarrhoea, and oral consumption of aloe leaf extracts has been linked to cases of acute hepatitis. The International Agency for Research on Cancer has classified non-decolorized whole leaf extract of aloe vera as a possible carcinogen in humans — non-decolorized meaning it has not been treated with activated carbon to remove toxic anthraquinone components — and animal studies have associated that non-decolorized extract with gastrointestinal cancer in rats and mice. There is reassurance for ordinary commercial drinks: a 2023 review of food-grade products containing no more than 10 parts per million of aloin concluded the drinkable products were not genotoxic. Taken by mouth in any form — gel, latex or whole leaf — aloe may be unsafe during pregnancy and breastfeeding.

Overuse of aloe latex may increase the risk of adverse effects from cardiac glycosides such as digoxin, which are used for some heart problems. The reason is worth understanding rather than memorising: latex acts as a stimulant laxative, laxative overuse depletes potassium, and low potassium is what makes digoxin toxicity more likely. The same logic means anyone already losing potassium — on loop or thiazide diuretics, for instance — has less margin. If you take any prescription medicine, this is worth raising with your prescriber before adding a daily aloe drink.

1. Aloe vera: A systematic review of its clinical effectiveness — Vogler BK, Ernst E Br J Gen Pract (1999)[PubMed ↗]
2. Aloe vera: a short review — Surjushe A, Vasani R, Saple DG Indian J Dermatol (NIH PMC) (2008)[NIH ↗]
3. Aloe Vera — National Center for Complementary and Integrative Health NCCIH (NIH) (2020)[NIH ↗]