Normal things that previous generations just did and now its called "BIOHACKING", nah dude its just called living how mother nature intended:

an hour of daily sunlight

8 hours of sleep

a high-protein diet

eating single ingredient foods

walking 8k+ steps

lifting heavy things

minimal screen time

daily reading and journaling

grounding in the sand to lower inflammation

sauna

People have no idea how good it feels to feel good anymore, and that's the main problem. Their baseline has been skewed to feel sick all the time.