Stop overplucking or waxing
Let brows grow for 6 to 12 weeks
Trim only the longest hairs
Exfoliate the brow area gently once or twice a week
Apply castor oil or a brow serum nightly
Use a peptide or peptide-rich eyebrow growth serum
Eat enough protein, iron, zinc, and biotin
Stay hydrated
Reduce stress and get enough sleep
Avoid harsh makeup removal and rubbing
Fill in sparse areas with eyebrow pencil or powder
Brush brows upward daily with a clean spoolie
See a dermatologist if thinning is sudden or severe