Definitions and Plain-Language Terms

Meaning-driven entries for phrases readers actually search, including age-defying, AI longevity, and the difference between biological age and biological aging.

Age-Defying Meaning

A plain-language explanation of what age-defying usually means in headlines and product copy ... and what it does not prove.

Terminology with mixed marketing usage

AI Longevity

A topic entry for the exact-match phrase AI longevity and its close variant longevity AI, separating real research use from loose product marketing.

Real research term with loose marketing usage

Biological Age vs. Biological Aging

A definition branch for one of the site's most important distinctions: biological age is an estimate, while biological aging is the process being estimated.

Terminology anchored to active measurement research
Research publication: Evidence levels are noted per entry. This content is for educational purposes and does not constitute medical advice. Data reflects current research status and is updated as the field evolves.