Use castor oil nightly
Apply a brow serum with peptides or biotin
Stop overplucking or waxing
Let brows grow out for several weeks
Brush brows upward daily
Exfoliate the brow area gently once or twice a week
Eat enough protein, iron, zinc, and vitamins A, C, D, and E
Stay hydrated
Reduce stress
Avoid harsh makeup removers and rubbing
Fill in sparse areas with brow pencil or powder
Consider minoxidil only with medical guidance
See a dermatologist if thinning is sudden or severe