Why tiny amounts of vitamin B12 matter more as we age

Two micrograms is an almost unimaginably small amount. It weighs less than a tiny fragment of a grain of table salt. Yet adults need only around this amount of vitamin B12 each day, depending on the guideline used, to support ...

Teaching the immune system to fight aging

Maybe we shouldn't be surprised that so-called "zombie cells" come with a catch. In response to severe damage, when cells can't recover full function but aren't ready to die, they can become senescent, in a zombie-like state ...

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