Customer reviews for Usana products are positive on Amazon.com, with an overwhelming majority giving the products five stars, as of 2015. Customers claim Usana products help them feel more energetic and less stressed and that the vitamins are a good supplement to a diet lacking nutrition.
One Amazon.com customer raves that after taking Usana Essentials for three months he has maximized his energy levels and no longer feels tired after workouts. Another customer notes that Usana vitamins don’t cause gastrointestinal pain like other vitamins. Additionally, a buyer states that he no longer needs an energy drink to get through the day. When taking Usana vitamins, he has no more fatigue, doesn’t require naps and looks forward to exercising.