'Load up on citrus fruit, berries and green vegetable for Vitamin C Day; boost your immune, fight off that cold and feel great!' Load of nonsense - you can't load up on Vitamin C, the body doesn't store it
Strangely either will do! But for different reasons. Beer bread is notoriously difficult to make whereas adding Vit C is simple and is almost guranteed to work, if I remember I'll knock up some beer bread to bring to Summer Camp.