Supplement
Aloe Vera
Three substances share this name, and the grade follows which one you actually bought.
Aloe vera is a succulent whose leaf holds three different products: the clear inner gel (soothing, mostly water and polysaccharides), the bitter yellow latex just under the rind (a stimulant laxative), and whole-leaf extracts that blend both. We grade Aloe Vera C- on evidence and C- for worth-it at about $10-20 per month.
Evidence
Worth it
Typical cost: $10-20/month
What it does
Aloe vera is a succulent whose leaf holds three different products: the clear inner gel (soothing, mostly water and polysaccharides), the bitter yellow latex just under the rind (a stimulant laxative), and whole-leaf extracts that blend both. It is used topically for burns and skin, and orally for digestion and blood sugar, including in Barbara O'Neill's teaching.
What the research says
Topical gel may speed burn healing, on low-quality trial data
Evidence: emerging. A meta-analysis of four trials (Maenthaisong 2007) found burns treated with aloe healed about 9 days faster than controls, and a psoriasis trial (Syed 1996) found an aloe extract cream cleared plaques better than placebo. The trials are small and old, blinding and product standardization are weak, and sunburn, the most common use, has the least support. Suggestive, never confirmed at modern standards.
Oral aloe for blood sugar: small pooled effects in low-quality trials
Evidence: weak. Meta-analyses of aloe juice and gel preparations in prediabetes and type 2 diabetes find fasting glucose reductions, from trials with high bias risk and wildly different preparations (gel, juice, whole leaf), so the pooled number cannot be attached to any product a reader can buy.
Aloe latex is a potent laxative that regulators removed from the laxative monograph
Evidence: moderate. The bitter yellow latex under the leaf rind contains aloin, a stimulant anthraquinone. In 2002 the FDA removed aloe from the over-the-counter laxative monograph for lack of adequate safety data. A two-year National Toxicology Program study then found whole-leaf aloe extract caused large-intestine cancers in rats, and IARC classifies whole-leaf extract as possibly carcinogenic to humans (Group 2B). 'Aloe' on a label can mean gel, latex, or whole leaf, and the risk profile follows which one it is.
Aloe's file is three files. The gel's topical wound data are old, small, and suggestive. The oral metabolic data are low-quality and preparation-scrambled. The latex's data include a regulatory removal and a carcinogenicity classification. Nothing here is strong in either direction except the safety record of the oral non-gel forms, which is strong in the wrong direction. C- for the ingredient as a whole, with the route and form splits doing the honest work inside the record.
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This grade for Aloe Vera rests on the record above. When a new result changes that record, the grade changes with it, and the Thursday email is where the change lands first: the week's longevity and biohacking news, in plain English, linked back to the reasoning on this page.
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Is it worth it?
Evidence (C-) sits below the leaderboard floor, so the worth-it grade is capped at C+ however inexpensive it is; the derived value lands at C-. About $15 a month across common forms. Derived from the October 2026 worth-it model.
Typical cost
$10-20/month
Common form, not a brand recommendation
Dosage context established
Topical gel is applied as needed; the burn trials used fresh gel or standardized creams several times daily. Oral products in the diabetes trials ranged across juices and capsules with no common standard. There is no established oral dose for any purpose, and no oral dose is recommended here for the latex or whole-leaf forms at all. Oral gel products labeled 'decolorized' have had most aloin removed, the only oral form with a tolerable safety file.
Worth-it leaderboard
Aloe Vera sits outside the worth-it top 20.
Aloe Vera sits outside the current top 20 on the gated leaderboard. The leaders below clear an evidence floor of B- before price counts at all, so cheap alone never earns a rank.
See the full worth-it leaderboard →
When the evidence moves a grade, this ranking moves with it. Thursday is where you hear it first.
Safety notes
Form is destiny. Gel on skin: rarely, contact irritation. Oral latex or whole-leaf products: cramping and diarrhea at laxative doses; chronic use depletes potassium, which can potentiate digoxin and interact with diuretics; kidney injury has been reported; and the rat carcinogenicity finding for whole-leaf extract is unresolved for humans, which is an argument for avoiding that form, not for panic about gel. Blood-sugar-lowering effects can add to diabetes medication. Do not use oral aloe in pregnancy (uterine stimulation is reported for the latex).
Longevity Lab Report
Aloe Vera news. Graded when it happens.
The grade on this page stays free. The email carries the news on aloe vera: expert moves, dose changes, and what is working, in plain English every Thursday.
Changelog
Last updated 2026-10-23
- 2026-10-23|Graded from the burn and psoriasis topical trials, the diabetes meta-analyses, and the regulatory record for aloe latex and whole-leaf extract (FDA 2002 monograph removal; NTP carcinogenicity findings; IARC Group 2B). The record's central lesson is printed in the whatItDoes: three different substances share this name, and every claim and risk attaches to a specific one.
- 2026-10-23|Listed under recovery, matching this record's graded topical burn-healing evidence.