The dragon blood tree is not dangerous to humans. Its distinctive red resin, known as “dragon’s blood,” has been used in traditional medicine for centuries, and toxicity studies consistently show it is well tolerated even at high doses. The tree does pose a real risk to cats and dogs, though, so pet owners should pay attention.
The Resin Is Safe for Humans
The red sap that gives the dragon blood tree its name contains flavonoids, chalcones, sterols, and terpenoids. In formal toxicity testing, a methanol extract of the resin from Dracaena cinnabari (the iconic species from Socotra Island) caused no deaths, no toxic signs, and no organ damage in animals given doses up to 2,000 mg per kilogram of body weight. That’s an enormous dose relative to anything a person would encounter. The extract was classified in the lowest toxicity category.
In a 28-day study where the resin extract was given daily at doses up to 1,500 mg/kg, researchers found no changes in body weight, food consumption, blood chemistry, or tissue samples from the liver, kidneys, heart, spleen, or lungs. A related species used in Chinese medicine, Dracaena cochinchinensis, showed similar results: rabbits given 3 g/kg daily for 90 days had no liver or kidney damage and no changes in blood cell counts.
Clinical studies involving hundreds of human patients have reinforced this safety profile. Across trials treating conditions ranging from angina to gastrointestinal bleeding to ulcerative colitis, researchers repeatedly noted no adverse reactions or toxic side effects. While these studies used the resin in controlled medical contexts, they confirm that dragon’s blood resin is not inherently toxic to people.
Toxic to Cats and Dogs
Dracaena species are toxic to both cats and dogs. The ASPCA lists the toxic compound as saponins, which are naturally occurring chemicals found throughout the plant. If a pet chews on the leaves or bark, symptoms can include vomiting (sometimes with blood), loss of appetite, drooling, and depression. Cats may also develop dilated pupils.
These symptoms are typically not life-threatening, but they can be distressing. If you keep any Dracaena species as a houseplant or have one in your yard, keeping it out of reach of pets is the simplest precaution. The common houseplant varieties sold under the Dracaena name (like the corn plant or lucky bamboo) carry the same saponin risk as their dramatic-looking wild cousins.
Physical Risks From Falling Branches
Like many large, mature trees, dragon blood trees can drop branches. This phenomenon, sometimes called “summer branch drop,” affects species across at least 19 genera and involves seemingly healthy limbs breaking off during hot, calm afternoons or after heavy rain following a dry spell. Branches up to a meter in diameter can fall without warning, and there is no reliable way to spot a limb that’s about to fail. The wood at the break point often looks perfectly sound.
Older, overmature trees are more prone to this than younger ones. Breaks typically happen one to four meters from where the branch attaches to the trunk, on long limbs that extend to or past the edge of the canopy. This is not a risk unique to dragon blood trees, but anyone spending time beneath a large specimen in hot weather should be aware of it.
What About the Berries?
Dragon blood trees produce small, fleshy berries that turn orange-red when ripe. There is limited formal research specifically on the fruit’s toxicity in humans, and they are not commonly eaten. The available toxicity studies focus on the resin, which is the part of the tree that has been used medicinally and commercially for thousands of years. If you encounter the berries, there’s no strong evidence they’re harmful, but there’s also no established tradition of eating them as food.
Skin Contact and Allergic Reactions
The resin has been applied directly to skin as a wound treatment in traditional medicine across multiple cultures, from the Arabian Peninsula to the Canary Islands. No widespread reports of contact dermatitis or allergic reactions appear in the literature. That said, any plant resin can cause irritation in sensitive individuals, so testing a small area first is reasonable if you’re handling the raw sap.