In a sense, cell death is a good thing, it's called Autophagy.

If autophagy doesn't occur frequently and properly you'll get cancer. 

There's a bunch of different fancy biohacks, technologies and supplements for autophagy but one of the simplest and most effect ways is habituating fasting, there's two fasting strategies

Intermittent fasting - Spending 16 hours a day NOT eating.

2-3 day fasts - Start at lunch, the 1st day is the hardest

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