2. Sleep
That vitamin D found in fish oil has other benefits too. One popular option is to take it in the morning in order to improve your sleep.
Remember: vitamin D is produced primarily in response to sunlight coming into contact with the skin. This in turn indicates to the body that it is daylight and thereby helps to regulate the body clock.
In short, it should mean that you are awake when you should be awake and that you area tired and sleepy when you should be tired and sleepy! This is a tip that is often recommended by health hackers, such as the popular Dave Asprey.