Installation :
1. Extract the file into your Fallout 4 folder (default location in : Program Files\Steam\steamapps\common\Fallout 4).
2. Edit “plugins.txt” located in Yourusername\AppData\Local\Fallout4
At the end of the file add this line : Food don’t heal.esp
3. After that you will need to set the file in read only (right click to the file, properties, check read only).
That’s all.