Vitamins, minerals, omega 3 and 6 fatty acids, protein and probiotic bacteria are essential for all aspects of body function and they must be obtained from the diet. Hectic lifestyles, convenience eating and everyday stress combined with the fact that industrial farming may deplete the nutrient content of some everyday foods mean that obtaining sufficient amounts of essential nutrients through diet can sometimes be difficult. Selecting supplements that provide a guaranteed intake can help to maintain nutrient levels and optimise health.