An herb found mainly in Thailand. Prized for its purported qualities as an aphrodisiac, butea superba is found in some newer male enhancement products. It is said to improve libido, allowing for larger erections. Some manufacturers also claim that butea superba gives men more control over their orgasms.

While there are currently no studies to show that butea superba affects sex drive, some compounds found in the plant may affect blood flow. This could account for some of the claimed aphrodisiac effects.