There is currently no convincing evidence that chlorophyll supplementation reduces bad breath or body odor.
Historically, chlorophyll was thought to have a deodorizing effect on urine, feces, wounds, breath, and general body odor; however, these claims were based primarily on case reports and on uncontrolled trials that had low-quality methodology and used outdated measurement tools.[1][2] One randomized controlled trial in people with a colostomy found that chlorophyll was no more effective than placebo in reducing fecal odor.[3] Most recently, a study published in 2004 found that in patients with trimethylaminuria — a genetic disorder that results in the build-up of trimethylamine (TMA) in the body, leading to a fishy body odor — chlorophyll (as SCC) reduced urinary levels of TMA, although changes in body odor were not assessed.[4]