Most people notice less puffiness and brighter under-eyes within the first two to three weeks. The deeper changes, dark circles and fine lines, build over six to eight weeks of twice-daily use. Because one tube lasts about four weeks, a single tube won't quite cover the full result window, so most people start with the 2-tube (2-month) bundle to avoid running out halfway. For the complete cycle, the 3-tube option covers all three months.