The use of pea and rice protein blends to support convalescence is justified by scientific evidence, although the evidence base is still developing. Convalescence—recovery from illness, surgery, or injury—often requires increased protein intake to prevent muscle wasting, promote tissue repair, and support immune function. Pea and rice proteins are both high-quality, plant-based sources of protein that, when combined, provide a more complete amino acid profile, including essential amino acids such as lysine (abundant in pea) and methionine (more present in rice).

Several clinical and preclinical studies show that plant-based proteins can support muscle protein synthesis similarly to animal-derived proteins when consumed in adequate amounts. For example, a 2015 study in the Journal of the International Society of Sports Nutrition found that pea protein supplementation promoted muscle thickness gains comparable to whey protein in resistance-trained individuals. While most research focuses on athletes, the underlying principle of muscle preservation and repair is directly relevant to convalescent populations.

Moreover, both pea and rice proteins are hypoallergenic and suitable for individuals with dairy or soy allergies, making them practical for patients with dietary restrictions during recovery. However, direct clinical trials using these blends specifically in convalescent settings are limited, and most recommendations are extrapolated from general protein research and knowledge of protein requirements during recovery.