Sleep 7-8 hours every night
Sleep is non-negotiable for your immune system, skin repair, and hair growth. An overview of systematic reviews found that 7-8 hours per day is the duration most favorably associated with health. Sleep deprivation suppresses immune cell proliferation, increases inflammatory markers (IL-6, CRP, TNF-α), and makes you more vulnerable to respiratory infections. Your body does most of its collagen synthesis and cellular repair during deep sleep. If you're investing in wellness shots but sleeping 5 hours, you're undermining the very processes those nutrients support.
Research
Itani, O., et al. — Sleep Medicine Reviews (2020)
7-8 hours sleep per day is most favorably associated with health outcomes in adults.
Besedovsky, L., Lange, T., & Born, J. — Pflügers Archiv - European Journal of Physiology (2012)
Sleep plays an indispensable role in immune health, mediating immune response efficiency and inflammation regulation.