"Truth Is" was the second single single released by Fantasia from her debut album, Free Yourself. The song peaked at No. 21 on the Billboard Hot 100 and had great success on the U.S. R&B 100 chart, peaking at No. 2 and setting a record for the longest stay at No. 1 for a female artist on the Billboard Adult R&B Airplay chart, with 14 consecutive weeks. In 2006, Truth Is, along with "Free Yourself", won an ASCAP R&B/Hip-Hop award.
The song's distinctive piano line is sampled from "Highways of My Life" by The Isley Brothers.