Since eating makes your body work, it can increase your temperature. So you may feel cold quicker than usual when fasting, and that’s nothing to worry about. 

Just go for exercise – preferably out in the fresh air – and drink lots of warm liquids such as unsweetened tea or hot water with a squeeze of lemon or ginger.  You can also try with warm foot baths, hot water bottles, wooly socks and a hot shower or bath. 

Make sure you're eating enough wholesome foods during your eating time such as lean proteins, green vegetables, nuts and beans.  

If you are also feeling more cold than usual during your eating window or for an extended period, make sure to check in with your doctor.