Gloria Hunniford and Chris Bavin discover if coconut oil really has the incredible health benefits that have led to it becoming so fashionable. As the truth is revealed, a devotee realises the oil has a surprising dark side.As three generations of the same family share their food habits to see which has the best diet, do teenagers really eat as badly as some headlines suggest?And after reports suddenly declared we should eat less protein as we get older, the team explores how much is needed to keep us fit and healthy into old age.