Following her debut album, You Signed Up for This (2021), Peters spent 2022 releasing droplet singles that did not form part of a larger project.

[5] On 5 January 2023, Peters announced "Body Better" as the lead single of a then-unreleased second album, but did not give it a release date at the time.

[6] She described it as "a song about vulnerability and quiet, forbidden fury; about heartbreak and insecurity so deeply rooted you have no idea where it begins or ends.

[15] The chorus sees her wonder if she can measure up to her ex-partner's ideals and societal beauty standards, asking "has she got a body better than mine?

"[1] The bridge of the song sees the production build up with faster-paced singing, representing "the stream of worries and fears you experience after a breakup".

[19] Uproxx's Lexi Lane admired that the emotional lyrical content did not "drag the song down" due to its "upbeat pop instrumental and a super catchy chorus".

[1] Imprint Entertainment praised Peters's musical growth and was glad to see the lead single showcase "the evolution of [her] acclaimed diary-style songwriting".

[20] Euphoria's Nmesoma Okechukwu opined that it had taken Peters a while to find her unique sound, but felt that she had found it with this song.