by Dr. Noel Peterson, ND, DAAPM Carl’s x-rays showed he had early-stage, grade 1 or 2 knee osteoarthritis (KOA). He was a 42-year-old accountant who relished his time spent outdoors. He loved his daily walks, skiing, and biking. He kept his fitness up by working … Learn More » “Knee Osteoarthritis: Timing is Everything”