Pea and rice protein blends are commonly used as plant-based protein supplements due to their complementary amino acid profiles, which together provide a more complete set of essential amino acids reminiscent of animal proteins. The structural system, primarily comprising bones, muscles, and connective tissues, depends on adequate protein intake for maintenance, repair, and growth. Scientific studies have shown that plant-based protein blends, particularly pea and rice proteins, can be effective in supporting muscle protein synthesis when consumed in sufficient quantities and combined properly. For example, research published in the Journal of the International Society of Sports Nutrition (2015) found that pea protein supplementation was as effective as whey protein in promoting muscle thickness gains during resistance training. Additionally, rice protein has been shown to support muscle recovery and growth, with a 2013 study in Nutrition Journal indicating similar outcomes to whey protein regarding muscle mass and strength improvements.

While these proteins are not specifically studied for bone health, adequate dietary protein is generally considered important for bone structure and function. However, direct evidence linking pea and rice protein blends to enhanced bone health is limited. Overall, the use of these blends to support the structural system is scientifically justified, particularly for muscle maintenance and growth, but the evidence is moderate rather than robust, especially with regard to bone and connective tissue effects.