Celosia, particularly Celosia argentea, has a long history of use in traditional medicine systems across Asia and Africa. In traditional Chinese medicine, it is known as "Qing Xiang Zi" and is primarily used for its anti-inflammatory, hemostatic, and eye health properties. There are anecdotal reports and traditional practices that suggest Celosia may be used as an adjunct to cancer treatment, especially to reduce side effects such as inflammation or bleeding due to its purported cooling and hemostatic effects. However, these uses are based on folk traditions and are not specific to modern chemotherapy or radiotherapy side effects.

Scientific research on Celosia's direct effect on cancer or its ability to mitigate cancer treatment side effects is extremely limited. Some in vitro and animal studies suggest that extracts of Celosia may possess antioxidant and anti-inflammatory actions, but robust clinical studies in cancer patients are lacking. No authoritative clinical trials demonstrate that Celosia reduces side effects of cancer therapy in humans. Therefore, while traditional use exists for related symptoms, there is minimal scientific validation for its use specifically in cancer treatment support.

In summary, the use of Celosia to support cancer treatment or reduce side effects is rooted mainly in traditional practices, with little scientific evidence currently available to support these claims.