Aloe Vera
Use CautionAloe vera gel is mildly toxic to dogs if ingested.
Toxicity Level
3/10Why It's Dangerous
The saponins in aloe can cause vomiting and diarrhea. The outer leaf is more toxic than the inner gel.
The Science
Saponins (aloin, barbaloin)Aloe vera contains saponins and anthraquinones (aloin and barbaloin) primarily in the latex layer between the outer green rind and inner gel. These compounds have a strong laxative effect and can cause significant GI irritation. The clear inner gel contains much lower concentrations and is generally less toxic. Saponins can also cause hemolysis (red blood cell destruction) at high doses.
Sources
- •ASPCA Animal Poison Control Center
- •Journal of Veterinary Pharmacology and Therapeutics
- •Merck Veterinary Manual
Dosage & Thresholds
The outer leaf and latex layer are significantly more toxic than the inner gel. Small licks of the inner gel are unlikely to cause serious harm. Chewing or ingesting the whole leaf — especially the outer green rind — can cause vomiting, diarrhea, and lethargy. Most cases resolve within 24 hours with supportive care.