Where Beauty Meets Biology.

Advanced hair, scalp, and skin wellness through personalized care, evidence-informed treatments, and restorative experiences.

Explore Hair + Scalp + Skin.
Meet our team. 
Our Story

Notch + Mill is a science-backed head spa and trichology-focused salon in St. Charles, Missouri, created for guests who want a more thoughtful, advanced approach to hair, scalp, and salon care. We combine restorative head spa rituals, advanced scalp care, trichology education, and customized salon services in one intentionally designed space.

Our approach is rooted in science, guided by experience, and shaped by a careful selection of products, ingredients, and technologies that support the health of the hair and scalp. From scalp treatments and head spa experiences to cutting, color, styling, and advanced hair-loss support, our team brings the same level of care, education, and attention to every service.

Serving St. Charles and the greater St. Louis area, Notch + Mill is where beauty, scalp health, and science come together.

Bridging Beauty & Biology.

A Community of Confidence

Testimonials

I went and received a scalp treatment. I have some hair loss from having autoimmune diseases and heard great things about this service with helping rejuvenate your scalp. Kim was fantastic.

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Kaitlin

Wildwood, MO

Absolutely amazing! Kim was so welcoming and caring. She is so knowledgeable and helpful with my scalp treatment! Excited to get my scalp healthy!

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Melissa

St. Louis, MO

I cannot say enough amazing things about Kim and the experience I had at Notch & Mill. I had a scalp treatment done and WOW.

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Cassidy

St. Charles, MO

I highly recommend the scalp treatment! I went in for the sole purpose of relaxation and got so much more out of it.

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Tara

Columbia, MO

I just completed a scalp treatment, this having been my second one i have had done and once again so impressed.

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Cheyenne

Ladue, MO

Every visit is designed with care and intention — here’s what our guests have shared about their experience at Notch + Mill.