DOI: 10.3109/10715762.2015.1028402 33
Photo-Protection: It helps repair skin damaged by UV radiation and strengthens the skins natural protective barrier
Sports Med 49(5):707718 Trexler ET, Keith DS, Schwartz TA, Ryan ED, Stoner L, Persky AM, Smith-Ryan AE (2019b) Effects of citrulline malate and beetroot juice supplementation on blood flow, energy metabolism, and performance during maximum effort leg extension exercise
The table below shows how all three compare
That is biology
Importantly, it also seems to improve granulation collagen during wound healing, meaning not only is there an acceleration of the healing itself, but that perhaps there is a likelihood of less scarring when healing (Tkalcevi, et al 2007)