The length of time in one's life where one is in optimal health.(noun)
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Use "healthspan" in a sentence
""We want to use the discoveries about calorie restriction and other related genetic or pharmacological interventions to close that 30-year gap between lifespan and 'healthspan'."
"So if researchers want to achieve big gains in lifespan and healthspan they have to go after the aging process itself."
"I can give the link to very useful site. healthspan healthspan"