- boosted resting metabolism
- increased insulin sensitivity
- ideal hormonal balance
- diminished systemic inflammation
- enhanced immune system
- maximized cellular longevity and all-around superhuman health
Initial cold adaptation — the formation of new brown fat — can start within days, and be detected within a week or so.
Higher level cold adaption — boosted immune system, increased insulin sensitivity — become pronounced within a number of weeks.
Highest levels of cold adaptation — reduced systemic inflammation, boosted resting metabolism, rebalanced hormones — may take months.
Since cold thermogenesis can amplify, and also be enhanced by, diet and exercise, those will factor in as well to how cold-adapted one may become.