She spends about $12 a day on her strategy, a price tag that includes some groceries. download the app Email address Sign up By clicking “Sign Up”, you accept our Terms of Service and Privacy Policy . NASABut it wasn't until Clark, now 56 and a recruiter, became an adult that she really became interested in optimizing her healthspan. Her aim now is to slow down the aging process, improving her overall health, plus getting stronger, slimmer, and less stressed as a result. Nicotinamide Riboside (an NAD+ boosting supplement): $26A supplement popular with longevity-seekers, it is thought to promote cellular health and boost energy.

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