Not really when you fast your metabolism actually increases instead of decreasing so you have an increase in metabolism when fasting.
When you short term fast your metabolism levels increase by at least 14 percent and does not decrease when you're fasting like it has been believed for awhile.
When fasting you burn off calories as well as muscle so fasting is a good way of burning off calories and losing weight.
But your metabolism should increase when fasting instead of lowering which is what my doctor told me when I asked him about fasting.
The doctor said that when I fast and skip meals that my metabolism should increase instead of lower.