Brooke began her career in 1987, working as a clinical dietitian at Saddleback Memorial Medical Center in Laguna Hills, California. In 1989, she moved to the Pacific Northwest and for 22 years served as a clinical nutrition specialist at Auburn Regional Medical Center, St. Joseph Medical Center and Tacoma General Hospital. During this time Brooke also maintained a thriving consulting business as a writer, nutrition motivational speaker and consulting nutritionist to corporations such as Boeing, REI and the FAA.