Dietary adherence refers to a person's ability or willingness to follow a specific diet, whether it be for medical reasons, weight loss goals, or personal preference. This can include following a particular food plan, avoiding certain foods, or taking supplements as recommended by a healthcare provider or nutritionist. Adherence is important because it helps ensure that the desired outcomes of the diet are achieved, such as improved health or weight loss. Non-adherence can lead to suboptimal results and may even be harmful if certain foods or supplements are not followed properly.