Hair Health Guide
Understand why hair loss happens, how to slow it down, and what actually works to regrow healthier hair.
Hair Loss Causes
The root of the problem
Grounded in a decade of peer-reviewed research, STL’s Nicholas Sadgrove, PhD, has identified 'the Big Eight Strikes'—the eight interconnected biological triggers that disrupt the hair follicle's natural growth cycle.
Early Signs of Hair Loss
The anatomy of early loss
Masked by the natural shedding cycle, we identify the microscopic reduction in shaft diameter that signals the onset of progressive follicular miniaturization.
How Hair Growth Happens
The mechanics of renewal
Driven by intricate cellular signaling, we map the three distinct phases that dictate the rhythm, density, and longevity of your hair's natural regeneration cycle.
01
The engine of production
Anagen – Growth Phase
Rapid mitotic division fueled by direct blood supply. This active stage dictates the maximum length, density, and thickness of your hair.
The signal to regress
Catagen – Transition Phase
A brief interval where the follicle detaches from the dermal papilla, cutting off nutrients and shrinking the root to halt production.
02
03
The dormancy and release
Telogen – Resting & Shedding Phase
The resting stage where the old strand sheds. The follicle resets its internal biological clock before signaling the start of a new cycle.
Treatments that Actually Work
The protocols of restoration
Validated by medical consensus, we detail the effective interventions that optimize the biology, chemistry, and environment governing your hair's structural recovery.
