The three stages of aging are young/early adulthood, late middle age and old age.
These stages and phases of aging often correspond to ages 34, 60 and age 78.
In addition, aging can also be broadly categorized into social aspects, psychological aspects and biological aspects.
Young/Early Adulthood is a stage of aging that marks the beginning of adulthood, and individuals experience various shifts in their bodies which include changes in their protein levels.
Late Middle Age is a phase of aging that is characterized by further changes in the body, which includes shifts in protein levels and an increased risk of certain health conditions.
Old age is a stage of aging that involves a significant decline in physical and cognitive functions, with individuals needing potential assistance with daily living.
Biological aging is a stage of aging that is the natural changes in the body that occur over time, which affects organs, senses and overall physical health.
Psychological aging is a stage of aging that refers to changes in your mental and emotional state, including your memory and cognitive abilities.
Social aging is a stage of aging that involves changes in your social roles, relationships as you age and retirement and shifts and family dynamics.
The age that is considered elderly medically is age 65 or older.
Elderly when in medical terms is used to describe people 65 years of age and older.
Although this definition of elderly can also be nuanced, and some people use early elderly to refer to people that are between 65 years of age and 74 years of age.
Later elderly is used to describe people over 75 years of age.
Also the concept of "frailty", which is the term used to refer to someone that has decreased physical and mental capacity is also considered when defining a person who is elderly.
If you're at least 65 you're medically considered early elderly.
If over age 65 then you can also be considered late elderly or elderly.
While health decline can vary from person to person, most health decline in people begins gradually and often starts in the 30s or 40s and then accelerates after age 60.
And although some changes such as muscle loss and slower metabolism start earlier, physical decline as well as cognitive changes are more noticeable later in life.
As you age, your skin also becomes sagging and loose and bones lose their mass and muscles also lose their strength.
Most people will begin to notice a shift in the appearance of their face around their 40s and 50s, and some notice a change in their 30s.