What is the best day to start?

You can start on any day, depending on what fits best for you. The first couple of days are critical to your success, so pick a start date that makes sense for your schedule. You might want to look for a time when you don't anticipate any family, work-related, or other social-type events that may present additional obstacles or temptations. Let your independent OPTAVIA Coach know which day you plan to start so they can provide you with support and guidance.