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Early puffiness fades by day 3. Slimming shows in week 2, peaks at week 6, and plateaus to month 3. Ultrasound tracks about 75 % of volume loss still present at month 9. Smokers or heavy-carb eaters may touch up every 6–8 months; others can wait closer to a year. The filler shrinks fat-cell size, not count, so weight gain can blur results.