Lusting after crisps? Unwrapping a mars bar ice cream with greed in your eyes? Licking the cream spoon and smiling with pleasure? You’re not alone, or unusual. Man is genetically coded to seek out, gorge and hoard these three fundamental building blocks for life - sugar, salt and fat. This is because they have, historically, been difficult to find, or costly to acquire/grow/nurture, or only very seasonally available. So we’re highly sensitive to their taste, their smell and their after effects…in short we’re sugar, salt and fat junkies. Happily, for 99.9% of our time on this earth, humans have had to accept their lot, and work around these cravings within local, regional, seasonal and cultural circumstances, so as to build time-honoured healthy traditional diets based on generations of trial and error. However, of the holy trinity of desire let’s not forget that in the natural world, salt and fat are usually much easier to obtain than sugar. Which is why the craving for swee...