For me I found that I need summer levels of vitamin D, so when for September to April take 40000 IU per day. For me I took 2-3 months to get out of power saving mode. In the summer I try to be a long as I can sun without getting sunburn without sunscreen, midday.
Then I do intermittent fasting only eating dinner.
This has led me to losing 250g per day.
No, if inside it is a problem.
It called Condensation