Circadian rhythm
Your internal 24-hour clock that regulates sleep, hormones, digestion, and energy.
Collagen
The most abundant protein in your body — structure for skin, joints, and connective tissue.
Cortisol
Your primary stress hormone, involved in energy, alertness, and inflammation.
Definitions are general education, not medical advice. The glossary grows with the site — entries are managed under Knowledge Base in the WordPress admin.