Fasting 10-16 hours can cause the body to turn its fat stores into energy, which releases ketones into the bloodstream.
This in turn encourages weight loss.
There are several forms of intermittent fasting, the most simple is 12:12; fasting for 12 hours and having a 12-hour eating window.
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The 16:8 method is fasting for 16 hours and day and having an 8-hour eating window.
On this fast, people usually finish their evening meal by 8pm and then skip breakfast the next day, not eating again until noon.
Source: Daily Express | Diet
