Ingesting aloe vera juice is not recommended for most health conditions and may interfere with thyroid medications or supplements, according to the Mayo Clinic. Aloe vera can lower blood sugar levels and increase risk of bleeding; it should not be used without consulting a physician.
Aloe vera is a commonly used topical gel, widely regarded as safe for relieving burns, rashes and minor irritation, according to the Mayo Clinic. Due to poor regulation of supplements, the U.S. Food and Drug Administration does not recommend ingesting aloe vera juice. Ingested aloe vera juice could react poorly with any medications or supplements used to treat thyroid conditions.