Considering the growing trend of endurance athletes supplementing with L-citrulline, can someone explain why its still not a staple in most road cyclists diets, despite research showing its potential to enhance performance and reduce muscle soreness? Is it simply a case of roadies being too caught up in their own hype to consider the science, or are there legitimate concerns about its efficacy that Im not aware of? Furthermore, how does L-citrullines impact on blood flow and oxygen delivery compare to more traditional methods of improving endurance, such as high-intensity interval training or altitude acclimatization?