Kieran,

The only thing I can think of is if you are going to work the night shift, try to get some sunlight at some point in your day as sunlight aids in important catalyzations of key zymogens (enzyme precursors) and the synthesis of vitamin D which is almost soley received with sun exposure. Sunlight, vitamin D synthesis and calcium go hand in hand to maintain bone density and a long list of other physiological needs. I'm happy to see that you are concerned with your health and how your job can effect it. That's an admirable thing.