NSCF Certified Personal Trainer Practice Exam 2025 - Free Personal Trainer Practice Questions and Study Guide

L-arginine is associated with stimulating growth hormone production due to its role as a precursor in the body for the synthesis of nitric oxide, which can enhance blood flow and lead to increased hormone release. Research has shown that L-arginine supplementation, particularly when taken in larger doses, can lead to significant increases in growth hormone levels, especially when administered during exercise or physical activity.

This stimulatory effect on growth hormone secretion is particularly advantageous for individuals looking to build muscle mass, improve recovery from workouts, and enhance overall athletic performance. In contrast, while the other amino acids mentioned have their own benefits and functions within the body, they do not have a direct and significant impact on stimulating growth hormone in the same manner as L-arginine does.