Skin barrier
The outermost layer of skin that keeps moisture in and irritants out.
Archives Knowledge Base
A–Z health, radiance and performance terms explained.
Progressive overload
Gradually increasing training demand — weight, reps, or difficulty — over time.
Deload
A planned easier training week that lets your body recover and adapt.
Cortisol
Your primary stress hormone, involved in energy, alertness, and inflammation.
Collagen
The most abundant protein in your body — structure for skin, joints, and connective tissue.
Circadian rhythm
Your internal 24-hour clock that regulates sleep, hormones, digestion, and energy.