Douglas was the first nutritionist hired by an NBA team. He analyzed cellular reasons for high performance through bloodwork and provided customized nutrients to improve each athlete's cellular health, which helped lead to 7 World Championships. His current clients include 1,000s of doctors, professional athletes, and CEOs like Russell Brunson, David Meltzer, and Leading E-Commerce Coaches Jared and Alison Prince.

With his company, Optimal Health Systems, Douglas teaches clinics to be more holistic by including nutrition and exercise with therapeutic whole food supplements. His expertise is in bloodwork systems for health professionals to customize nutrients for patients' unique cellular needs. OHS specializes in easy-to-implement systems to increase patients' health faster and clinics' residual net income.