Can kale help with eye health? Does grapefruit fight fat? And is sugar substitute xylitol good for your teeth?

Are berries as good for us as they're made out to be? Can detox drinks containing charcoal rid our bodies of toxins and undo a weekend of excess? Is sweet potato a malnutrition game-changer?

Can broccoli help fight cancer? Is quinoa better than rice? And should we be adding a type of algae, spirulina, to our diets?

Can fermented milk drink kefir help keep digestive disease at bay? Is omega-3 rich oily fish a must-eat for heart health? And can wheatgrass oxygenate our blood?