
What are the long-term biological effects of disrupted sleep on hair vitality?
Disrupted sleep gradually erodes hair vitality through hormonal imbalances, increased cellular stress, and impaired repair mechanisms within the follicle.

What are the less recognized physiological pathways connecting sleep quality to hair follicle regeneration?
Sleep quality influences hair follicle regeneration through circadian rhythm alignment, immune system regulation, and cellular antioxidant defense.