Agave Drug Interactions, Uses, Effectiveness, Safety & More

Agave is a group of spiny, succulent plants native to the southwestern United States, Mexico, and Central and South America. It also grows in the Mediterranean, parts of Africa, and India. The plant forms a large rosette of thick, rigid leaves edged with curved spines, and the well-known Agave americana is sometimes called the "century plant."

Agave is most familiar today as the source of agave nectar (agave syrup), a sweetener made from the plant's sap, and as the base ingredient for tequila and mezcal. In traditional medicine, different parts of the plant have been used for digestive complaints, skin and wound care, and minor infections.

Although agave is widely consumed as food, its use as a medicine or supplement is not well studied, and most reported benefits come from traditional use or laboratory work rather than strong human trials.

Agave contains several plant compounds, including saponins, steroidal compounds (genins), flavonoids, isoflavones, coumarins, and an enzyme called a serine protease. Its sap also contains calcium oxalate crystals, oxalic acid, and acrid oils, which are thought to cause the plant's irritating effects.

The agave used for sweeteners is rich in fructans, fiber-like carbohydrates similar to inulin. These fructans are sometimes studied as prebiotics that may support beneficial gut bacteria. Saponins are being explored in the lab for possible antimicrobial and anti-inflammatory actions.

It is important to know that most of these proposed effects are based on laboratory or animal research, not on well-designed human studies, so we cannot be sure they apply to people.

Agave nectar used as a food sweetener is generally considered safe for most people in normal amounts, though it is still a sugar and should be limited if you are watching blood sugar, weight, or calories.

Using the raw plant, leaves, or sap medicinally is a different matter. The fresh sap contains irritating substances (calcium oxalate, oxalic acid, and acrid oils) that can cause skin and eye irritation and may be harmful if swallowed in larger amounts. People with kidney problems or a history of kidney stones should be especially careful because of the oxalate content.

Pregnancy and breastfeeding: There is not enough reliable safety information about medicinal agave use during pregnancy or breastfeeding, and some traditional sources suggest it may affect the uterus. To be safe, avoid medicinal use during these times. Agave nectar as an occasional sweetener in food is a separate, lower-concern matter.

Always talk with a pharmacist or doctor before using agave as a supplement, especially if you have a health condition or take regular medicines.

When used as a food sweetener, agave nectar is usually well tolerated, but because it is high in fructose it may cause gas, bloating, or stomach upset in some people, especially in large amounts.

Contact with the fresh plant sap can cause skin redness, itching, burning, blistering, and irritation of the eyes. Some people may have allergic reactions. Swallowing large amounts of raw plant material could cause stomach upset or more serious irritation.

Serious reactions are uncommon with normal food use, but stop using agave and seek medical care if you have signs of an allergic reaction such as swelling, trouble breathing, or a widespread rash.

There is no established standardized medicinal dose for agave. Most people only encounter it as agave nectar used to sweeten food and drinks, where the "dose" is simply how much sweetener you choose to use.

For any supplement product containing agave extract, follow the directions on the product label and do not exceed the recommended amount. Because the raw plant can be irritating, do not make your own preparations from fresh leaves or sap.

When in doubt, check with your pharmacist or doctor, who can help you decide whether an agave product is appropriate for you.