The duration of the effects of Belotero under the eyes can vary depending on several factors, such as the type of Belotero product used, the patient’s metabolism, and the injection technique. Belotero fillers can last between 6 and 18 months under the eyes, depending on the person’s metabolism.. In clinical studies, some patients maintained improvement in the area under the eyes for up to 10-12 months after treatment with Belotero. The longevity of the results may vary between individuals and depends on how the patient’s body metabolizes the product. Patients should also keep in mind that fillers tend to last longer in areas with less movement, such as the tear troughs, than in areas with more movement, such as the mouth. In general, the effects of Belotero fillers can be expected to last longer under the eyes than in other areas of the face.