Aloe Vera Benefits: What Works on Skin and What to Avoid Drinking
Published on 9 September, 2026
Aloe vera is two quite different products sold under one name, and almost everything worth knowing follows from telling them apart. The clear gel from the inner leaf, applied to skin, has genuine randomized trial evidence behind it for healing burns. The yellow latex just beneath the leaf skin, taken by mouth, is a stimulant laxative with documented safety concerns.
Most people looking up aloe want the first thing, and the evidence there is genuinely good. Taking aloe internally is a separate question with a separate risk profile, and telling the two products apart is easier than it sounds.
What Aloe Vera Is
Aloe is a succulent that grows in hot, dry climates, cultivated across subtropical regions including southern Texas, New Mexico, Arizona and California. It was used in ancient Greece, Rome, Babylonia and China, historically for skin conditions.
Cut a leaf and you get two substances. The inner leaf gel is the clear, mucilaginous flesh, largely water with polysaccharides. The latex is the bitter yellow sap that seeps from just under the rind, containing anthraquinones which act as stimulant laxatives. Commercial aloe products differ enormously in how much of each they contain, and in whether the latex has been filtered out, which manufacturers call decolorizing.
| Inner leaf gel | Leaf latex | |
|---|---|---|
| What it is | Clear, mucilaginous flesh from the center of the leaf | Bitter yellow sap just beneath the leaf skin |
| Main constituents | Water and polysaccharides | Anthraquinones |
| Main use | Applied to skin | Acts as a stimulant laxative if swallowed |
| Evidence | Randomized trials support faster burn healing | Effect is well known; safety for regular use is not established |
| Risk profile | Low. Occasional burning, itching or rash | Cramping and diarrhea; whole leaf products linked to hepatitis and to tumors in animal studies |
On Skin, Where the Evidence Is Good
Topical aloe gel is where the research is strongest and the risk lowest. The National Center for Complementary and Integrative Health (NCCIH) describes topical use of aloe gel as generally well tolerated, with occasional reports of burning, itching, rash and eczema.
Burns
A 2024 systematic review and meta-analysis in the Journal of Burn Care and Research pooled nine randomized controlled trials. Compared with other topical treatments, aloe vera reduced mean wound-healing time by 3.76 days (95% confidence interval -5.69 to -1.84). The same analysis found no significant difference in pain reduction or in the risk of wound infection.
An earlier meta-analysis in Advances in Skin and Wound Care focused specifically on second-degree burns, drawing on four studies covering 133 patients and 163 wounds.
Nearly four days off healing time is a meaningful result for a cheap and widely available product. It is worth being clear about scope: these were burns being treated clinically, and serious burns need medical care rather than a plant. For a minor household burn, after cooling it under running water, aloe gel is a reasonable thing to apply.
Other skin uses
Aloe gel is used for sunburn, dry skin, minor cuts and irritation. The evidence for these is thinner than for burns, but the risk is low and the soothing effect is real enough that centuries of use is not surprising. Wounds that are deep, dirty, not healing, or showing signs of infection need a clinician rather than a leaf.
Taking Aloe by Mouth
This is where care is needed, and the distinction between the products matters most.
- Oral aloe gel appears safe in the short term. Research suggests use of up to 42 days is safe.
- Oral aloe latex causes abdominal pain, cramps and diarrhea. It works as a stimulant laxative, which is the effect, not a side effect.
- Oral aloe leaf extracts have been linked to cases of acute hepatitis, in people taking them for periods ranging from as little as three weeks to as long as five years.
- Non-decolorized whole leaf extract has been associated with gastrointestinal cancer in rats and mice in animal studies. Most animal toxicity research has used this form, which is not the type most consumers buy.
- Decolorized extract has shown some potential to damage DNA or chromosomes in a small amount of laboratory research.
Read that list as a reason to be deliberate rather than alarmed. If you want aloe for your skin, none of it applies. If you are drinking aloe juice daily as a general wellness habit, it is worth knowing that the safety evidence supports short-term use of the gel and does not support indefinite use of whole-leaf products.
Aloe is also not the tool to reach for if constipation is the problem. Stimulant laxatives are not intended for regular long-term use, and gentler, better-evidenced options exist, including soluble fiber such as psyllium husk.
How to Choose and Use It
- For skin, use pure inner leaf gel. Check the ingredients: a good product lists aloe near the top, not water followed by a long list with aloe near the bottom.
- If you use a fresh leaf, slice it and stand the cut end upright for ten minutes to let the yellow latex drain out, then rinse the gel before applying it. That drained sap is the part responsible for most of the concerns above.
- Patch test on a small area before using it widely, particularly if you have sensitive skin or react to plants in the lily family.
- For internal use, choose a decolorized, purified inner-leaf product rather than whole leaf, and treat it as a defined course rather than a permanent habit.
- Speak to your physician before taking aloe internally if you take any medication, particularly for diabetes, heart conditions or as a diuretic, and always before surgery.
Because supplements are not approved by the US Food and Drug Administration (FDA) before they are sold, the rules for making and distributing them are less strict than for drugs, and what is on the label is your main protection. Prefer manufacturers who publish third-party testing.
Who Should Take Care
- Pregnancy and breastfeeding. Avoid oral aloe, particularly latex-containing products.
- Children. Oral aloe is not appropriate. Topical gel on minor skin irritation is a different matter.
- Anyone with a bowel condition such as Crohn's disease, ulcerative colitis or obstruction should not take aloe latex.
- Anyone with kidney or liver disease, given the reports of hepatitis associated with oral leaf extracts.
- Anyone taking medication. Stimulant laxatives can affect how other drugs are absorbed and can alter potassium levels, which matters particularly alongside heart medication and diuretics.
- Before surgery. Tell your surgical team, as with any supplement.
The Short Version
Aloe gel on skin is well supported, low risk and genuinely useful, and the burn evidence is better than most people realize. Aloe taken by mouth is a different product with a different risk profile, best used briefly and deliberately, if at all. If you remember one thing, let it be that the clear gel and the yellow sap are not the same substance.
FAQs
Q: Is it safe to drink aloe vera juice every day?
A: Short-term use of oral aloe gel, up to about six weeks, appears safe. Long-term daily use is not well supported: oral aloe leaf extracts have been linked to cases of acute hepatitis, and whole leaf extract has been associated with gastrointestinal tumors in animal studies. If you drink it, choose a decolorized inner-leaf product and treat it as a defined course.
Q: Does aloe vera actually help burns heal?
A: Yes, for burns being treated clinically. A meta-analysis of nine randomized trials found aloe reduced mean healing time by about 3.8 days compared with other topical treatments. It did not significantly change pain or infection risk. Serious burns still need medical care.
Q: What is the difference between aloe gel and aloe latex?
A: Gel is the clear inner flesh of the leaf. Latex is the bitter yellow sap just under the skin, containing anthraquinones that act as stimulant laxatives. Nearly all the safety concerns with aloe relate to latex and to whole leaf products that include it.
Q: Can I use a fresh aloe leaf from my plant?
A: Yes, for skin. Slice it, stand the cut end upright for about ten minutes so the yellow latex drains away, rinse the gel, then apply. Patch test first. Do not eat fresh leaf without knowing what you are doing, since that is where the latex is.
Q: Is aloe vera good for acne or scars?
A: It is widely used and soothing, and the risk of trying it is low, but the clinical evidence for acne and scarring is much thinner than for burns. Treat it as a gentle adjunct rather than a treatment.
Q: Does aloe vera help with constipation?
A: Aloe latex works as a stimulant laxative, which is why it has that reputation. Stimulant laxatives are not meant for regular long-term use. Soluble fiber such as psyllium husk has better evidence and a better safety profile for ongoing management.
Q: Can aloe vera cause liver problems?
A: Cases of acute hepatitis have been reported in people taking oral aloe leaf extracts, over periods from three weeks to five years. This applies to oral use, not to gel applied to skin. Anyone with existing liver disease should avoid taking aloe internally.
Q: Is aloe vera safe during pregnancy?
A: Avoid oral aloe during pregnancy, particularly latex-containing or whole leaf products. Topical gel on skin is a separate question, but as with anything in pregnancy, check with the clinician managing your care.
Q: What does decolorized aloe mean?
A: It means the manufacturer has filtered out the anthraquinones from the latex, usually using charcoal. Decolorized inner-leaf products are the preferred form for anything taken by mouth.
Q: Can I put aloe vera on an open wound?
A: On a minor, clean graze it is generally fine. Deep wounds, dirty wounds, animal bites, wounds that will not stop bleeding and anything showing signs of infection need medical attention, not a home remedy.
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Sources
- National Center for Complementary and Integrative Health, National Institutes of Health. Aloe Vera. nccih.nih.gov/health/aloe-vera
- Effects of Aloe vera on Burn Injuries: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Journal of Burn Care and Research. 2024. PMID 38605441.
- Second-Degree Burns and Aloe Vera: A Meta-analysis and Systematic Review. Advances in Skin and Wound Care. 2022. PMID 36264753.
- National Center for Complementary and Integrative Health. Ayurvedic Medicine: In Depth. nccih.nih.gov/health/ayurvedic-medicine-in-depth
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