Better! with Dr. Stephanie What’s Really Causing Women’s Hair to Thin & How To Reverse It with Alessandra Zonari PhD
Jun 16, 2025
Alessandra Zonari, Co-founder and CSO of OneSkin, specializes in stem cell biology and skin regeneration. She dives into the science of hair loss, detailing how hormonal changes and inflammation affect women differently than men. Discover groundbreaking peptides like OS1 and their potential to enhance hair follicle health. Alessandra shares practical advice on using hair care products, the benefits of red light therapy, and the importance of a healthy scalp for vibrant hair. Tune in for a blend of science and actionable insights!
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Hair Loss Happens Before We Notice
- By the time hair thinning is noticed, 50% of hair is already lost.
- Hair growth relies on a cycle with a variable anagen (growth) phase from two to seven years.
Hair Growth Cycle Explained
- Hair grows in three phases: anagen (growth), ketogen (transition), and telogen (shedding).
- Shortening the anagen phase with aging leads to thinner, shorter hair.
Recognize Normal Hair Shedding
- Normal hair shedding is about 100 hairs per day, varying by hair length.
- Notice increased shedding or stress, diet changes as possible causes requiring attention.