consult your doctor before making any decisions about supplements.In Sports Nutrition for Endurance Athletes, nutritionist Monique Ryan notes that, "For endurance athletes they [supplements] are crucially important. Because of your training

.In Sports Nutrition for Endurance Athletes, nutritionist Monique Ryan notes that, "For endurance athletes they [supplements] are crucially important. Because of your training and the stress it imposes on your body, you may need higher amounts of vitamins

.While the average man needs 10mg of iron daily, the average woman needs almost twice as much - 18mg per day for those of childbearing age. This is why anaemia is more common in women. It's easy to improve your iron levels by taking a supplement or asking your GP

. Usually I urge people to get nutrients from food, but in this case it's easier and more effective to take a fish-oil supplement, because eating too much fish raises concerns about mercury."

."Milk is good for you, but there's a time and place for it," explains Robert Kunz, of endurance-specific sports nutrition company First Endurance. Here, we explain where and when dairy does your body good.Myth 1: Dairy helps you lose weightThe truth A clinical