How To Lower Stress Impact From Surgery?

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I have a surgery soon that I cannot opt out of, I was wondering what I could eat, drink or do to mitigate the stress it will put on my body. I will not take opiates or any of that nonsense afterwards. I was thinking green tea, carrots, raw cheese to absorb toxins, mushrooms, heavy whipping cream and liver. I use progesterone on the luteal phase of my cycle and occasionally take aspirin, but I'm not sure if aspirin would be a good idea after a surgery.